diff --git a/ldvspec/fixtures/fixture_16122022.json b/ldvspec/fixtures/fixture_16122022.json
index b2ddab9d75f105c206969de6ee88ed74548a64e2..9089497f437d4d5b0bc4f76c457a136798b2561c 100644
--- a/ldvspec/fixtures/fixture_16122022.json
+++ b/ldvspec/fixtures/fixture_16122022.json
@@ -12,11 +12,9 @@
       "activity": "Raw Observation",
       "surl": "srm://srm.grid.sara.nl:8443/pnfs/grid.sara.nl/data/lofar/ops/projects/lc0_012/86574/L86574_SAP000_SB139_uv.MS_bc088c70.tar",
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-      "additional_meta": {
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-        "dysco_compression": false,
-        "instrument_filter": "110-190 MHz"
-      }
+      "antenna_set": "HBA Dual Inner",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
     }
   },
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@@ -32,11 +30,9 @@
       "activity": "Raw Observation",
       "surl": "srm://srm.grid.sara.nl:8443/pnfs/grid.sara.nl/data/lofar/ops/projects/lc0_012/86577/L86577_SAP000_SB321_uv.MS_7ecfdb5a.tar",
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-        "dysco_compression": false,
-        "instrument_filter": "110-190 MHz"
-      }
+      "antenna_set": "HBA Dual Inner",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
     }
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@@ -52,11 +48,9 @@
       "activity": "Raw Observation",
       "surl": "srm://srm.grid.sara.nl:8443/pnfs/grid.sara.nl/data/lofar/ops/projects/lc0_012/86577/L86577_SAP000_SB315_uv.MS_6cc4b1dd.tar",
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-      }
+      "antenna_set": "HBA Dual Inner",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
     }
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@@ -72,11 +66,9 @@
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-        "dysco_compression": false,
-        "instrument_filter": "110-190 MHz"
-      }
+      "antenna_set": "HBA Dual Inner",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
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@@ -92,11 +84,9 @@
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-        "instrument_filter": "110-190 MHz"
-      }
+      "antenna_set": "HBA Dual Inner",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
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@@ -112,11 +102,9 @@
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-      "additional_meta": {
-        "antenna_set": "HBA Dual Inner",
-        "dysco_compression": false,
-        "instrument_filter": "110-190 MHz"
-      }
+      "antenna_set": "HBA Dual Inner",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
     }
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@@ -132,11 +120,9 @@
       "activity": "Raw Observation",
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-      }
+      "antenna_set": "HBA Dual Inner",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
     }
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@@ -152,11 +138,9 @@
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-      }
+      "antenna_set": "HBA Dual Inner",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
     }
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@@ -172,11 +156,9 @@
       "activity": "Raw Observation",
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-        "dysco_compression": false,
-        "instrument_filter": "110-190 MHz"
-      }
+      "antenna_set": "HBA Dual Inner",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
     }
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@@ -192,11 +174,9 @@
       "activity": "Raw Observation",
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+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
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@@ -212,11 +192,9 @@
       "activity": "Raw Observation",
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-      }
+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
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@@ -232,11 +210,9 @@
       "activity": "Raw Observation",
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-        "dysco_compression": false,
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-      }
+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
     }
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@@ -252,11 +228,9 @@
       "activity": "Raw Observation",
       "surl": "srm://srm.grid.sara.nl:8443/pnfs/grid.sara.nl/data/lofar/ops/projects/ips/58991/L58991_SAP002_B003_S0_P000_bf.raw_d6b65ea5.tar",
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-      }
+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
     }
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@@ -272,11 +246,9 @@
       "activity": "Raw Observation",
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-      }
+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
     }
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@@ -292,11 +264,9 @@
       "activity": "Raw Observation",
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-      }
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+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
     }
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@@ -312,11 +282,9 @@
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-      }
+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
     }
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@@ -332,11 +300,9 @@
       "activity": "Raw Observation",
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+      "antenna_set": "LBA Outer",
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+      "instrument_filter": "10-90 MHz"
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@@ -352,11 +318,9 @@
       "activity": "Raw Observation",
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-      }
+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
     }
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@@ -372,11 +336,9 @@
       "activity": "Raw Observation",
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-      }
+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
     }
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@@ -392,11 +354,9 @@
       "activity": "Raw Observation",
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-      }
+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
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@@ -412,11 +372,9 @@
       "activity": "Raw Observation",
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-      }
+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
+      "instrument_filter": "10-90 MHz"
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@@ -432,11 +390,9 @@
       "activity": "Raw Observation",
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+      "antenna_set": "HBA Dual",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
     }
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@@ -452,11 +408,9 @@
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-      }
+      "antenna_set": "HBA Dual",
+      "dysco_compression": false,
+      "instrument_filter": "110-190 MHz"
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@@ -472,11 +426,9 @@
       "activity": "Raw Observation",
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@@ -512,11 +462,9 @@
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+      "antenna_set": "LBA Outer",
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+      "instrument_filter": "10-90 MHz"
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       "activity": "Raw Observation",
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-      }
+      "antenna_set": "LBA Outer",
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@@ -552,11 +498,9 @@
       "activity": "Raw Observation",
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-      }
+      "antenna_set": "LBA Outer",
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+      "instrument_filter": "10-90 MHz"
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       "activity": "Raw Observation",
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+      "antenna_set": "LBA Outer",
+      "dysco_compression": false,
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       "activity": "Raw Observation",
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@@ -5720,9 +5108,7 @@
       "activity": "Pulsar Pipeline",
       "surl": "srm://lta-head.lofar.psnc.pl:8443/lofar/ops/projects/ddt5_003/455796/L455796_summaryCV_e32fe58d.tar",
       "filesize": 684257280,
-      "additional_meta": {
-        "dysco_compression": false
-      }
+      "dysco_compression": false
     }
   },
   {
@@ -5738,9 +5124,7 @@
       "activity": "Pulsar Pipeline",
       "surl": "srm://lta-head.lofar.psnc.pl:8443/lofar/ops/projects/lt5_003/625510/L625510_summaryCV_63abdace.tar",
       "filesize": 1318287360,
-      "additional_meta": {
-        "dysco_compression": false
-      }
+      "dysco_compression": false
     }
   },
   {
@@ -5756,9 +5140,7 @@
       "activity": "Pulsar Pipeline",
       "surl": "srm://lta-head.lofar.psnc.pl:8443/lofar/ops/projects/lt5_004/447284/L447284_summaryCS_34e5822f.tar",
       "filesize": 30787379200,
-      "additional_meta": {
-        "dysco_compression": false
-      }
+      "dysco_compression": false
     }
   },
   {
@@ -5774,9 +5156,7 @@
       "activity": "Pulsar Pipeline",
       "surl": "srm://lta-head.lofar.psnc.pl:8443/lofar/ops/projects/lt5_004/447296/L447296_summaryIS_3f065b2a.tar",
       "filesize": 438046720,
-      "additional_meta": {
-        "dysco_compression": false
-      }
+      "dysco_compression": false
     }
   },
   {
diff --git a/ldvspec/lofardata/migrations/0015_alter_dataproduct_dysco_compression.py b/ldvspec/lofardata/migrations/0015_alter_dataproduct_dysco_compression.py
new file mode 100644
index 0000000000000000000000000000000000000000..916dee755ef5ccdd025528b2b0882105238e5c52
--- /dev/null
+++ b/ldvspec/lofardata/migrations/0015_alter_dataproduct_dysco_compression.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.1.5 on 2023-01-13 09:43
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('lofardata', '0014_auto_20230111_1059'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='dataproduct',
+            name='dysco_compression',
+            field=models.BooleanField(blank=True, default=False, null=True),
+        ),
+    ]
diff --git a/ldvspec/lofardata/models.py b/ldvspec/lofardata/models.py
index 3d1e3a48ada6b59bab6714c12e21a937fd665a61..9b034adb1861da373055c6692e7053b7fc425369 100644
--- a/ldvspec/lofardata/models.py
+++ b/ldvspec/lofardata/models.py
@@ -19,7 +19,7 @@ class DataProduct(models.Model):
     filesize = models.PositiveBigIntegerField()
     antenna_set = models.CharField(max_length=50, blank=True, null=True, default="")
     instrument_filter = models.CharField(max_length=50, blank=True, null=True, default="")
-    dysco_compression = models.BooleanField(default=False)
+    dysco_compression = models.BooleanField(blank=True, null=True, default=False)
 
     @staticmethod
     def insert_dataproduct(
diff --git a/ldvspec/lofardata/tests/test_data_filter.py b/ldvspec/lofardata/tests/test_data_filter.py
index d3e3523d48634ef667792040d2905ab34f7774e2..19a0369384b414704ee17e309d0f64b6ea39bb2e 100644
--- a/ldvspec/lofardata/tests/test_data_filter.py
+++ b/ldvspec/lofardata/tests/test_data_filter.py
@@ -62,3 +62,5 @@ class TestDataFilter(rtest.APITestCase):
         self.assertEqual('observation', response.data['results'][0]['activity'])
 
         self.assertIn('activity_type', self.get_current_query_parameters())
+
+
diff --git a/ldvspec/lofardata/tests/test_dataproductinfo.py b/ldvspec/lofardata/tests/test_dataproductinfo.py
index 7f2d39a8f5a6bded103cc3daf5db8ca2b52c36fb..0a2460f25e853976ce4431303082c5e87c0e99c1 100644
--- a/ldvspec/lofardata/tests/test_dataproductinfo.py
+++ b/ldvspec/lofardata/tests/test_dataproductinfo.py
@@ -1,86 +1,131 @@
 import unittest
 
 from lofardata.models import DataProduct
-from lofardata.views import retrieve_general_dataproduct_information
-
-test_object_value_one = dict(obs_id='12345', oid_source='SAS', dataproduct_source='lofar',
-                             dataproduct_type='observation',
-                             project='LT10_10',
-                             location='lta-head.lofar.psnc.pl',
-                             activity='secret stuff',
-                             surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_nice.tar',
-                             filesize=40,
-                             antenna_set='HBA Dual Inner',
-                             instrument_filter='110-190 MHz',
-                             dysco_compression=True)
-
-test_object_value_two = dict(obs_id='123789', oid_source='SAS', dataproduct_source='lofar',
-                             dataproduct_type='observation',
-                             project='LT10_10',
-                             location='lta-head.lofar.psnc.pl',
-                             activity='secret stuff',
-                             surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_very_nice.tar',
-                             filesize=40,
-                             antenna_set='HBA Dual Inner',
-                             instrument_filter='110-190 MHz',
-                             dysco_compression=True)
-
-test_object_value_three = dict(obs_id='123789', oid_source='SAS', dataproduct_source='lofar',
-                               dataproduct_type='observation',
-                               project='LT10_10_Classified',
-                               location='lta-head.lofar.psnc.pl',
-                               activity='secret stuff',
-                               surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_not_nice.tar',
-                               filesize=40,
-                               antenna_set='HBA Dual Inner',
-                               instrument_filter='110-190 MHz',
-                               dysco_compression=False)
-
-test_object_value_four = dict(obs_id='1337', oid_source='SAS', dataproduct_source='lofar',
-                               dataproduct_type='observation',
-                               project='LT10_10_Classified',
-                               location='lta-head.lofar.psnc.pl',
-                               activity='secret stuff',
-                               surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_not_very_nice.tar',
-                               filesize=40,
-                               antenna_set='HBA Dual Inner',
-                               instrument_filter='110-190 MHz',
-                               dysco_compression=False)
-
-test_object_value_five = dict(obs_id='3773', oid_source='SAS', dataproduct_source='lofar',
-                               dataproduct_type='observation',
-                               project='LT10_10_Classified',
-                               location='lta-head.lofar.psnc.pl',
-                               activity='secret stuff',
-                               surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_not_very_super_nice.tar',
-                               filesize=40,
-                               antenna_set=None,
-                               instrument_filter='110-190 MHz',
-                               dysco_compression=False)
-
-test_object_value_six = dict(obs_id='0987', oid_source='SAS', dataproduct_source='lofar',
-                               dataproduct_type='observation',
-                               project='LT10_10_Classified',
-                               location='lta-head.lofar.psnc.pl',
-                               activity='secret stuff',
-                               surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_very_super_nice.tar',
-                               filesize=40,
-                               antenna_set='',
-                               instrument_filter='',
-                               dysco_compression=False)
+from lofardata.view_helpers.dataproductinfo import retrieve_combined_information
+
+test_objects = [dict(obs_id='12345', oid_source='SAS', dataproduct_source='lofar',
+                     dataproduct_type='observation',
+                     project='LT10_10',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_nice.tar',
+                     filesize=40,
+                     antenna_set='HBA Dual Inner',
+                     instrument_filter='110-190 MHz',
+                     dysco_compression=True),
+
+                dict(obs_id='123789', oid_source='SAS', dataproduct_source='lofar',
+                     dataproduct_type='observation',
+                     project='LT10_10',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_very_nice.tar',
+                     filesize=40,
+                     antenna_set='HBA Dual Inner',
+                     instrument_filter='110-190 MHz',
+                     dysco_compression=True),
+
+                dict(obs_id='123789', oid_source='SAS', dataproduct_source='lofar',
+                     dataproduct_type='observation',
+                     project='LT10_10_Classified',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_not_nice.tar',
+                     filesize=40,
+                     antenna_set='HBA Dual Inner',
+                     instrument_filter='110-190 MHz',
+                     dysco_compression=False),
+
+                dict(obs_id='1337', oid_source='SAS', dataproduct_source='lofar',
+                     dataproduct_type='observation',
+                     project='LT10_10_Classified',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_not_very_nice.tar',
+                     filesize=40,
+                     antenna_set='HBA Dual Inner',
+                     instrument_filter='110-190 MHz',
+                     dysco_compression=False),
+
+                dict(obs_id='3773', oid_source='SAS', dataproduct_source='lofar',
+                     dataproduct_type='observation',
+                     project='LT10_10_Classified',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_not_very_super_nice.tar',
+                     filesize=40,
+                     antenna_set=None,
+                     instrument_filter='110-190 MHz',
+                     dysco_compression=False),
+
+                dict(obs_id='0987', oid_source='SAS', dataproduct_source='lofar',
+                     dataproduct_type='observation',
+                     project='LT10_10_Classified',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_very_super_nice.tar',
+                     filesize=40,
+                     antenna_set='',
+                     instrument_filter='',
+                     dysco_compression=False),
+
+                dict(obs_id='2626', oid_source='SAS', dataproduct_source='lofar',
+                     dataproduct_type='observation',
+                     project='LT10_10_Classified',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_beautiful.tar',
+                     filesize=40,
+                     antenna_set='',
+                     instrument_filter='',
+                     dysco_compression=None),
+
+                dict(obs_id='2627', oid_source='SAS', dataproduct_source='lofar',
+                     dataproduct_type='observation',
+                     project='LT10_10_Classified',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_not_beautiful.tar',
+                     filesize=40,
+                     antenna_set='',
+                     instrument_filter='',
+                     dysco_compression=None),
+
+                dict(obs_id='2627', oid_source='SAS', dataproduct_source='apertif',
+                     dataproduct_type='observation',
+                     project='LT10_10_Classified',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_very_beautiful.tar',
+                     filesize=40,
+                     antenna_set='',
+                     instrument_filter='',
+                     dysco_compression=True),
+
+                dict(obs_id='2627', oid_source='SAS', dataproduct_source='ska',
+                     dataproduct_type='observation',
+                     project='LT10_10_Classified',
+                     location='lta-head.lofar.psnc.pl',
+                     activity='secret stuff',
+                     surl='srm://lta-head.lofar.psnc.pl:4884/subfolder/some_not_so_beautiful.tar',
+                     filesize=40,
+                     antenna_set='',
+                     instrument_filter='',
+                     dysco_compression=False)]
+
 
 class RetrieveDataProductInformation(unittest.TestCase):
 
     def setUp(self):
-        DataProduct.objects.create(**test_object_value_one)
-        DataProduct.objects.create(**test_object_value_two)
-        DataProduct.objects.create(**test_object_value_three)
-        DataProduct.objects.create(**test_object_value_four)
-        DataProduct.objects.create(**test_object_value_five)
-        DataProduct.objects.create(**test_object_value_six)
+        for test_object in test_objects:
+            DataProduct.objects.create(**test_object)
+
+    def test_setup_correct(self):
+        number_of_dataproducts = DataProduct.objects.count()
+        self.assertEqual(number_of_dataproducts, len(test_objects))
 
     def test_single_database_entry(self):
-        actual = retrieve_general_dataproduct_information('12345')
+        actual = retrieve_combined_information('12345')
         self.assertEqual(actual['dataproduct_source'], ['lofar'])
         self.assertEqual(actual['dataproduct_type'], ['observation'])
         self.assertEqual(actual['project'], ['LT10_10'])
@@ -89,25 +134,33 @@ class RetrieveDataProductInformation(unittest.TestCase):
         self.assertEqual(actual['instrument_filter'], ['110-190 MHz'])
 
     def test_combined_database_entries(self):
-        actual = retrieve_general_dataproduct_information('123789')
+        actual = retrieve_combined_information('123789')
         self.assertEqual(actual['project'], ['LT10_10', 'LT10_10_Classified'])
 
     def test_single_with_none_value(self):
-        actual = retrieve_general_dataproduct_information('3773')
+        actual = retrieve_combined_information('3773')
         self.assertEqual(actual['antenna_set'], [])
 
     def test_single_with_default_values(self):
-        actual = retrieve_general_dataproduct_information('0987')
+        actual = retrieve_combined_information('0987')
         self.assertEqual(actual['antenna_set'], [])
 
     def test_dysco_compression_true_and_false(self):
-        actual = retrieve_general_dataproduct_information('123789')
+        actual = retrieve_combined_information('123789')
         self.assertEqual(actual['dysco_compression'], [0.5])
 
     def test_dysco_compression_true(self):
-        actual = retrieve_general_dataproduct_information('12345')
+        actual = retrieve_combined_information('12345')
         self.assertEqual(actual['dysco_compression'], [1])
 
     def test_dysco_compression_false(self):
-        actual = retrieve_general_dataproduct_information('1337')
+        actual = retrieve_combined_information('1337')
         self.assertEqual(actual['dysco_compression'], [0])
+
+    def test_dysco_compression_only_none(self):
+        actual = retrieve_combined_information('2626')
+        self.assertEqual(actual['dysco_compression'], [0])
+
+    def test_dysco_compression_partly_none(self):
+        actual = retrieve_combined_information('2627')
+        self.assertEqual(actual['dysco_compression'], [0.3333333333333333])
diff --git a/ldvspec/lofardata/tests/test_util_funcs.py b/ldvspec/lofardata/tests/test_inputs_processor.py
similarity index 80%
rename from ldvspec/lofardata/tests/test_util_funcs.py
rename to ldvspec/lofardata/tests/test_inputs_processor.py
index 959115a3ef47ead7fab38f1882a2558aa9ef4844..4101905cf51b048c6c68991dc57ba8bc42891aca 100644
--- a/ldvspec/lofardata/tests/test_util_funcs.py
+++ b/ldvspec/lofardata/tests/test_inputs_processor.py
@@ -1,32 +1,6 @@
 import unittest
-import random
 
-from lofardata.tasks import split_entries_to_batches
-from lofardata.views import compute_size_of_inputs, compute_inputs_histogram, format_size
-
-
-class SplitEntries(unittest.TestCase):
-    def test_no_splitting(self):
-        res = split_entries_to_batches([*range(10)], 0)
-        self.assertListEqual(res, [[*range(10)]])
-
-    def test_splitting_empty_array(self):
-        res = split_entries_to_batches([], 2)
-        self.assertListEqual(res, [])
-
-    def test_splitting_bs1(self):
-        res = split_entries_to_batches([*range(10)], 1)
-        self.assertEqual(len(res), 10)
-        # TODO: check contents
-
-    def test_splitting_exact_match(self):
-        res = split_entries_to_batches([*range(9)], 3)
-        self.assertEqual(len(res), 3)
-
-    def test_splitting_with_left_over(self):
-        res = split_entries_to_batches([*range(10)], 3)
-        self.assertEqual(len(res), 4)
-        self.assertEqual(len(res[-1]), 1)
+from lofardata.view_helpers.inputs_processor import compute_inputs_histogram, compute_size_of_inputs
 
 
 class ComputeInputSizes(unittest.TestCase):
@@ -94,7 +68,8 @@ class ComputeInputsHistogram(unittest.TestCase):
         self.assertEqual(1000000000000000000, max_size)
         self.assertEqual(5, biggest_bucket)
         self.assertListEqual([5, 0, 0, 0, 0, 1], counts)  # TODO: if this is the case, adapt it to logarithmic scale
-        self.assertListEqual(['1.000B', '148.030PB', '296.059PB', '444.089PB', '592.119PB', '740.149PB', '888.178PB'], bins)
+        self.assertListEqual(['1.000B', '148.030PB', '296.059PB', '444.089PB', '592.119PB', '740.149PB', '888.178PB'],
+                             bins)
 
     def test_two_ranges(self):
         test_data = {"surls": [{"size": 97873920, "surl": "test"},
@@ -119,5 +94,5 @@ class ComputeInputsHistogram(unittest.TestCase):
         self.assertEqual(97873920, min_size)
         self.assertEqual(97884160, max_size)
         self.assertEqual(8, biggest_bucket)
-        self.assertListEqual([8,7], counts)  # TODO: if this is the case, adapt it to logarithmic scale
+        self.assertListEqual([8, 7], counts)  # TODO: if this is the case, adapt it to logarithmic scale
         self.assertListEqual(['93.340MB', '93.345MB', '93.350MB'], bins)
diff --git a/ldvspec/lofardata/tests/test_split_entries.py b/ldvspec/lofardata/tests/test_split_entries.py
new file mode 100644
index 0000000000000000000000000000000000000000..300db5501e26386839423b9a0815a59877615d29
--- /dev/null
+++ b/ldvspec/lofardata/tests/test_split_entries.py
@@ -0,0 +1,27 @@
+import unittest
+
+from lofardata.tasks import split_entries_to_batches
+
+
+class SplitEntries(unittest.TestCase):
+    def test_no_splitting(self):
+        res = split_entries_to_batches([*range(10)], 0)
+        self.assertListEqual(res, [[*range(10)]])
+
+    def test_splitting_empty_array(self):
+        res = split_entries_to_batches([], 2)
+        self.assertListEqual(res, [])
+
+    def test_splitting_bs1(self):
+        res = split_entries_to_batches([*range(10)], 1)
+        self.assertEqual(len(res), 10)
+        # TODO: check contents
+
+    def test_splitting_exact_match(self):
+        res = split_entries_to_batches([*range(9)], 3)
+        self.assertEqual(len(res), 3)
+
+    def test_splitting_with_left_over(self):
+        res = split_entries_to_batches([*range(10)], 3)
+        self.assertEqual(len(res), 4)
+        self.assertEqual(len(res[-1]), 1)
diff --git a/ldvspec/lofardata/view_helpers/__init__.py b/ldvspec/lofardata/view_helpers/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/ldvspec/lofardata/view_helpers/dataproductinfo.py b/ldvspec/lofardata/view_helpers/dataproductinfo.py
new file mode 100644
index 0000000000000000000000000000000000000000..5e68f025b1a71fa0183888f01251c3c056038d7b
--- /dev/null
+++ b/ldvspec/lofardata/view_helpers/dataproductinfo.py
@@ -0,0 +1,41 @@
+from lofardata.models import DataProduct
+
+
+def retrieve_combined_information(sas_id):
+    # Per SAS ID, the retrieved data products should have these unique values
+    data_products = DataProduct.objects.filter(obs_id=sas_id).values('dataproduct_source',
+                                                                     'dataproduct_type',
+                                                                     'project',
+                                                                     'location',
+                                                                     'activity',
+                                                                     'antenna_set',
+                                                                     'instrument_filter',
+                                                                     'dysco_compression').distinct()
+    combined_data_products_on_key = combine_dataproducts_on_key(data_products)
+
+    dysco_compressions = combined_data_products_on_key['dysco_compression']
+    if len(dysco_compressions) == 0:  # the dysco_compression is unknown i.e. None
+        combined_data_products_on_key['dysco_compression'] = [0]
+    else:
+        true_count = len([dysco_compression for dysco_compression in dysco_compressions if dysco_compression])
+        dysco_compression_true_percentage = true_count / len(combined_data_products_on_key['dysco_compression'])
+        # put in a list for template convenience
+        combined_data_products_on_key['dysco_compression'] = [dysco_compression_true_percentage]
+
+    return combined_data_products_on_key
+
+
+def combine_dataproducts_on_key(data_products):
+    combined_data_products = {}
+    for data_product in data_products:
+        combined_data_products = fill_unique_nested_dict(data_product, combined_data_products)
+    return combined_data_products
+
+
+def fill_unique_nested_dict(data_product, combined_data_products_on_key):
+    for key, value in data_product.items():
+        if combined_data_products_on_key.get(key) and value not in combined_data_products_on_key.get(key):
+            combined_data_products_on_key[key].append(value)
+        else:
+            combined_data_products_on_key[key] = [value] if value is not None and value != '' else []
+    return combined_data_products_on_key
diff --git a/ldvspec/lofardata/view_helpers/filters_preprocessor.py b/ldvspec/lofardata/view_helpers/filters_preprocessor.py
new file mode 100644
index 0000000000000000000000000000000000000000..c28bcf63b18dc66d1d5346349551c420be8f97e9
--- /dev/null
+++ b/ldvspec/lofardata/view_helpers/filters_preprocessor.py
@@ -0,0 +1,20 @@
+from lofardata.models import DataProductFilter, DataFilterType, DataProduct
+
+
+def preprocess(specification):
+    dataproduct_filters = DataProductFilter.objects.all()
+    for dataproduct_filter in dataproduct_filters:
+        if (
+                specification is not None
+                and specification.filters
+                and dataproduct_filter.field in specification.filters
+        ):
+            dataproduct_filter.default = specification.filters[dataproduct_filter.field]
+        else:
+            dataproduct_filter.default = ""
+
+        if dataproduct_filter.filter_type == DataFilterType.DROPDOWN:
+            dataproduct_filter.choices = DataProduct.objects.distinct(
+                dataproduct_filter.field
+            ).values_list(dataproduct_filter.field)
+    return dataproduct_filters
diff --git a/ldvspec/lofardata/view_helpers/inputs_processor.py b/ldvspec/lofardata/view_helpers/inputs_processor.py
new file mode 100644
index 0000000000000000000000000000000000000000..d8d9f6b953c2d7a4dbd4350bf6d0c9d506d25fb9
--- /dev/null
+++ b/ldvspec/lofardata/view_helpers/inputs_processor.py
@@ -0,0 +1,60 @@
+from typing import Tuple
+
+import numpy
+
+
+def compute_size_of_inputs(inputs: dict) -> Tuple[int, int, int]:
+    total_size = 0
+    number_of_files = 0
+
+    if isinstance(inputs, dict) and "size" in inputs:
+        number_of_files = 1
+        total_size = inputs["size"]
+    elif (
+            isinstance(inputs, dict)
+            or isinstance(inputs, list)
+            or isinstance(inputs, tuple)
+    ):
+        values = inputs
+        if isinstance(inputs, dict):
+            values = inputs.values()
+        for value in values:
+            item_total, item_count, _ = compute_size_of_inputs(value)
+            total_size += item_total
+            number_of_files += item_count
+
+    average_file_size = total_size / number_of_files if number_of_files else 0
+
+    return total_size, number_of_files, average_file_size
+
+
+def compute_inputs_histogram(inputs):
+    # create sizes array
+    if isinstance(inputs, dict):
+        inputs = inputs.values()
+    inputs_sizes = []
+    for entry in inputs:
+        for item in entry:
+            inputs_sizes.append(item['size'])
+    inputs_sizes = numpy.array(inputs_sizes)
+
+    # define histogram values
+    min_size = inputs_sizes.min()
+    max_size = inputs_sizes.max()
+
+    n_distinct_sizes = numpy.unique(inputs_sizes).__len__()
+    n_bins = min(n_distinct_sizes, 100)
+    counts, buckets = numpy.histogram(inputs_sizes, bins=n_bins, range=(min_size, max_size))
+    formatted_bins = [format_size(bucket) % bucket for bucket in buckets]
+
+    return min_size, max_size, n_bins, counts.tolist(), counts.max(), formatted_bins
+
+
+def format_size(num, suffix="B"):
+    if num == 0:
+        return "-"
+    for unit in ["", "K", "M", "G", "T", "P", "E", "Z"]:
+        if abs(num) < 1024.0:
+            return f"{num:3.3f}{unit}{suffix}"
+        num /= 1024.0
+    return f"{num:.1f}Yi{suffix}"
diff --git a/ldvspec/lofardata/views.py b/ldvspec/lofardata/views.py
index a2e78b68d056bb6600b4b28afcb6ff00da980e5f..cdb895968428e5c5c5ddf50ed530ad1a8336da64 100644
--- a/ldvspec/lofardata/views.py
+++ b/ldvspec/lofardata/views.py
@@ -1,17 +1,13 @@
-import logging
 import time
-from typing import Tuple
-import numpy
 
 from django.contrib.auth.models import User
 from django.core.exceptions import ObjectDoesNotExist
 from django.http import HttpResponseRedirect
 from django.shortcuts import redirect, render
-from django.urls import reverse
-from django.views.generic import CreateView, DeleteView, DetailView, UpdateView, TemplateView
+from django.views.generic import DeleteView, DetailView, UpdateView, TemplateView
 from django.views.generic.list import ListView
 from django_filters import rest_framework as filters
-from rest_framework import generics, status, viewsets
+from rest_framework import generics, viewsets
 from rest_framework.decorators import action
 from rest_framework.response import Response
 from rest_framework.reverse import reverse_lazy
@@ -20,7 +16,6 @@ from rest_framework.schemas.openapi import AutoSchema
 from .forms import WorkSpecificationForm
 from .models import (
     ATDBProcessingSite,
-    DataFilterType,
     DataProduct,
     DataProductFilter,
     WorkSpecification,
@@ -32,63 +27,7 @@ from .serializers import (
     WorkSpecificationSerializer,
 )
 from .tasks import insert_task_into_atdb
-
-
-def compute_size_of_inputs(inputs: dict) -> Tuple[int, int, int]:
-    total_size = 0
-    number_of_files = 0
-
-    if isinstance(inputs, dict) and "size" in inputs:
-        number_of_files = 1
-        total_size = inputs["size"]
-    elif (
-            isinstance(inputs, dict)
-            or isinstance(inputs, list)
-            or isinstance(inputs, tuple)
-    ):
-        values = inputs
-        if isinstance(inputs, dict):
-            values = inputs.values()
-        for value in values:
-            item_total, item_count, _ = compute_size_of_inputs(value)
-            total_size += item_total
-            number_of_files += item_count
-
-    average_file_size = total_size / number_of_files if number_of_files else 0
-
-    return total_size, number_of_files, average_file_size
-
-
-def compute_inputs_histogram(inputs):
-    # create sizes array
-    if isinstance(inputs, dict):
-        inputs = inputs.values()
-    inputs_sizes = []
-    for entry in inputs:
-        for item in entry:
-            inputs_sizes.append(item['size'])
-    inputs_sizes = numpy.array(inputs_sizes)
-
-    # define histogram values
-    min_size = inputs_sizes.min()
-    max_size = inputs_sizes.max()
-
-    n_distinct_sizes = numpy.unique(inputs_sizes).__len__()
-    n_bins = min(n_distinct_sizes, 100)
-    counts, buckets = numpy.histogram(inputs_sizes, bins=n_bins, range=(min_size, max_size))
-    formatted_bins = [format_size(bucket) % bucket for bucket in buckets]
-
-    return min_size, max_size, n_bins, counts.tolist(), counts.max(), formatted_bins
-
-
-def format_size(num, suffix="B"):
-    if num == 0:
-        return "-"
-    for unit in ["", "K", "M", "G", "T", "P", "E", "Z"]:
-        if abs(num) < 1024.0:
-            return f"{num:3.3f}{unit}{suffix}"
-        num /= 1024.0
-    return f"{num:.1f}Yi{suffix}"
+from .view_helpers import inputs_processor, dataproductinfo, filters_preprocessor
 
 
 class DynamicFilterSet(filters.FilterSet):
@@ -126,62 +65,6 @@ def api(request):
     return render(request, "lofardata/api.html", {"atdb_hosts": atdb_hosts})
 
 
-def preprocess_filters_specification_view(specification):
-    dataproduct_filters = DataProductFilter.objects.all()
-    for dataproduct_filter in dataproduct_filters:
-        if (
-                specification is not None
-                and specification.filters
-                and dataproduct_filter.field in specification.filters
-        ):
-            dataproduct_filter.default = specification.filters[dataproduct_filter.field]
-        else:
-            dataproduct_filter.default = ""
-
-        if dataproduct_filter.filter_type == DataFilterType.DROPDOWN:
-            dataproduct_filter.choices = DataProduct.objects.distinct(
-                dataproduct_filter.field
-            ).values_list(dataproduct_filter.field)
-    return dataproduct_filters
-
-
-def retrieve_general_dataproduct_information(sas_id):
-    # Per SAS ID, the retrieved data products should have these unique values
-    data_products = DataProduct.objects.filter(obs_id=sas_id).values('dataproduct_source',
-                                                                     'dataproduct_type',
-                                                                     'project',
-                                                                     'location',
-                                                                     'activity',
-                                                                     'antenna_set',
-                                                                     'instrument_filter',
-                                                                     'dysco_compression').distinct()
-    combined_data_products_on_key = combine_dataproducts_on_key(data_products, {})
-
-    dysco_compressions = combined_data_products_on_key['dysco_compression']
-    true_count = len([dysco_compression for dysco_compression in dysco_compressions if dysco_compression])
-    dysco_compression_true_percentage = true_count / len(combined_data_products_on_key['dysco_compression'])
-    # put in a list for template convenience
-    combined_data_products_on_key['dysco_compression'] = [dysco_compression_true_percentage]
-    return combined_data_products_on_key
-
-
-def combine_dataproducts_on_key(data_products, combined_data_products):
-    for data_product in data_products:
-        combined_data_products = fill_unique_nested_dict(data_product, combined_data_products)
-    return combined_data_products
-
-
-def fill_unique_nested_dict(data_product, combined_data_products_on_key):
-    for key, value in data_product.items():
-        if combined_data_products_on_key.get(key) and \
-                value not in combined_data_products_on_key.get(key) and \
-                value is not None and value != '':
-            combined_data_products_on_key[key].append(value)
-        else:
-            combined_data_products_on_key[key] = [value] if value is not None and value != '' else []
-    return combined_data_products_on_key
-
-
 class Specifications(ListView):
     serializer_class = WorkSpecificationSerializer
     template_name = "lofardata/index.html"
@@ -214,7 +97,7 @@ class WorkSpecificationCreateUpdateView(UpdateView):
             specification = WorkSpecification.objects.get(pk=context["object"].pk)
         except ObjectDoesNotExist:
             specification = None
-        context["filters"] = preprocess_filters_specification_view(specification)
+        context["filters"] = filters_preprocessor.preprocess(specification)
         context["processing_sites"] = list(ATDBProcessingSite.objects.values("name", "url"))
 
         return context
@@ -258,13 +141,13 @@ class WorkSpecificationDetailView(DetailView):
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         specification = WorkSpecification.objects.get(pk=context["object"].pk)
-        context["filters"] = preprocess_filters_specification_view(specification)
-        total_input_size, number_of_files, average_file_size = compute_size_of_inputs(
+        context["filters"] = filters_preprocessor.preprocess(specification)
+        total_input_size, number_of_files, average_file_size = inputs_processor.compute_size_of_inputs(
             specification.inputs
         )
         context["number_of_files"] = number_of_files
-        context["total_input_size"] = format_size(total_input_size)
-        context["size_per_task"] = format_size(
+        context["total_input_size"] = inputs_processor.format_size(total_input_size)
+        context["size_per_task"] = inputs_processor.format_size(
             average_file_size * specification.batch_size
             if specification.batch_size > 0
             else total_input_size
@@ -296,10 +179,11 @@ class WorkSpecificationDatasetSizeInfoView(DetailView):
         context = super().get_context_data(**kwargs)
         specification = WorkSpecification.objects.get(pk=context["object"].pk)
 
-        min_size, max_size, n_bins, counts, biggest_bucket, bins = compute_inputs_histogram(specification.inputs)
+        min_size, max_size, n_bins, counts, biggest_bucket, bins = inputs_processor.compute_inputs_histogram(
+            specification.inputs)
 
-        context["min_size"] = format_size(min_size)
-        context["max_size"] = format_size(max_size)
+        context["min_size"] = inputs_processor.format_size(min_size)
+        context["max_size"] = inputs_processor.format_size(max_size)
         context["biggest_bucket"] = biggest_bucket
         context["n_bins"] = n_bins
         context["counts"] = counts
@@ -321,7 +205,7 @@ class DataProductViewPerSasID(TemplateView):
 
         sas_id = specification.filters['obs_id']
         context["sas_id"] = sas_id
-        context["dataproduct_info"] = retrieve_general_dataproduct_information(sas_id)
+        context["dataproduct_info"] = dataproductinfo.retrieve_combined_information(sas_id)
         return context