L2SS-2277: Fix XST swap in gRPC

README.md

@@ -150,6 +150,7 @@ Next change the version in the following places:
    through [https://git.astron.nl/lofar2.0/tango/-/tags](Deploy Tags)
 
 # Release Notes
+* 0.48.1 Fix exposing correct triangle of XSTs in gRPC service
 * 0.48.0 Add Antennafield to gRPC server
 * 0.47.2 Fix ZMQ hostname to subscribe to in gRPC server
 * 0.47.1 Move GrafanaAPIV3 RPC interface to Opah repo

tangostationcontrol/VERSION

-0.47.2
+0.48.1

tangostationcontrol/rpc/statistics.py

@@ -206,7 +206,7 @@ class Statistics(statistics_pb2_grpc.StatisticsServicer, LastStatisticsMessagesM
             )
             for antenna1 in range(nr_antennas)
             for antenna2 in range(nr_antennas)
-            if antenna1 <= antenna2
+            if antenna2 <= antenna1
         ]
 
         frequency_band = self._message_to_frequency_band(xst_message)

tests/rpc/test_statistics.py

@@ -176,19 +176,27 @@ class TestStatistics(base.TestCase):
             xst_message["integration_interval"], reply.result.integration_interval, 6
         )
 
-        # verify all data is there
+        # verify all baselines are there
         self.assertEqual(
             set(
                 [
                     (a, b)
                     for a in range(N_pn * A_pn)
                     for b in range(N_pn * A_pn)
-                    if a <= b
+                    if b <= a
                 ]
             ),
             set([(b.antenna1, b.antenna2) for b in reply.result.baselines]),
         )
 
+        # verify all baselines actually have data (and do not take data from
+        # the wrong half of the matrix that is filled with zeroes)
+        for b in reply.result.baselines:
+            self.assertNotEqual(0.0, b.xx.power_db, msg=f"{b}")
+            self.assertNotEqual(0.0, b.xy.power_db, msg=f"{b}")
+            self.assertNotEqual(0.0, b.yx.power_db, msg=f"{b}")
+            self.assertNotEqual(0.0, b.yy.power_db, msg=f"{b}")
+
         # verify data matches input
         xst_data = (
             numpy.array(xst_message["xst_data_real"])