Task #11550: H5parm: store weights in single precision, fix underflow

CEP/DP3/DPPP/src/SolTab.cc

@@ -125,12 +125,15 @@ namespace LOFAR {
     }
 
     // Add weights
+    // Do not use half float data type because typical weights range can be 1.e-14
+    /*
     hid_t halffloat = H5Tcopy(H5T_IEEE_F32BE);
     H5Tset_fields(halffloat, 15, 10, 5, 0, 10);
     H5Tset_size(halffloat, 2);
     H5Tset_ebias(halffloat, 15);
     H5Tlock(halffloat);
-    H5::DataSet weightset = createDataSet("weight", H5::DataType(halffloat),
+    */
+    H5::DataSet weightset = createDataSet("weight", H5::PredType::IEEE_F32LE,
                                           dataspace);
 
     // If weights are empty, write ones everywhere