1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
#include "observationinfo.h"
#include <casacore/measures/Measures/MDirection.h>
#include <casacore/measures/Measures/MCDirection.h>
#include <casacore/measures/Measures/MEpoch.h>
#include <casacore/measures/Measures/MPosition.h>
#include <casacore/measures/Measures/MCPosition.h>
#include <casacore/measures/TableMeasures/ScalarMeasColumn.h>
#include <casacore/tables/Tables/TableRecord.h>
#include <aocommon/io/serialostream.h>
#include <aocommon/io/serialistream.h>
#include "../structures/msselection.h"
namespace wsclean {
void ObservationInfo::Serialize(aocommon::SerialOStream& stream) const {
stream.Double(phaseCentreRA)
.Double(phaseCentreDec)
.String(telescopeName)
.String(observer)
.String(fieldName);
}
void ObservationInfo::Unserialize(aocommon::SerialIStream& stream) {
stream.Double(phaseCentreRA)
.Double(phaseCentreDec)
.String(telescopeName)
.String(observer)
.String(fieldName);
}
ObservationInfo ReadObservationInfo(casacore::MeasurementSet& ms,
size_t fieldId) {
ObservationInfo obsInfo;
casacore::MSAntenna aTable = ms.antenna();
size_t antennaCount = aTable.nrow();
if (antennaCount == 0) throw std::runtime_error("No antennae in set");
casacore::MPosition::ScalarColumn antPosColumn(
aTable, aTable.columnName(casacore::MSAntennaEnums::POSITION));
casacore::MPosition ant1Pos = antPosColumn(0);
size_t fieldRow =
(fieldId == schaapcommon::reordering::MSSelection::kAllFields) ? 0
: fieldId;
casacore::MEpoch::ScalarColumn timeColumn(
ms, ms.columnName(casacore::MSMainEnums::TIME));
casacore::MSField fTable(ms.field());
casacore::MDirection::ScalarColumn phaseDirColumn(
fTable, fTable.columnName(casacore::MSFieldEnums::PHASE_DIR));
casacore::MDirection phaseDir = phaseDirColumn(fieldRow);
casacore::MEpoch curtime = timeColumn(0);
casacore::MeasFrame frame(ant1Pos, curtime);
casacore::MDirection::Ref j2000Ref(casacore::MDirection::J2000, frame);
casacore::MDirection j2000 =
casacore::MDirection::Convert(phaseDir, j2000Ref)();
casacore::Vector<casacore::Double> j2000Val = j2000.getValue().get();
obsInfo.phaseCentreRA = j2000Val[0];
obsInfo.phaseCentreDec = j2000Val[1];
if (fTable.keywordSet().isDefined("WSCLEAN_DL") ||
fTable.keywordSet().isDefined("WSCLEAN_DM")) {
throw std::runtime_error(
"This measurement was processed with chgcentre to have a shifted phase "
"centre. \n"
"This kind of shifting has been directly implemented in wsclean. "
"Because of this,\n"
"the chgcentre approach is no longer supported. Use chgcentre to undo "
"the shift\n"
"and use wsclean's -shift parameter.\n");
}
casacore::MSObservation oTable = ms.observation();
size_t obsCount = oTable.nrow();
if (obsCount == 0) throw std::runtime_error("No observations in set");
casacore::ScalarColumn<casacore::String> telescopeNameColumn(
oTable, oTable.columnName(casacore::MSObservation::TELESCOPE_NAME));
casacore::ScalarColumn<casacore::String> observerColumn(
oTable, oTable.columnName(casacore::MSObservation::OBSERVER));
obsInfo.telescopeName = telescopeNameColumn(0);
obsInfo.observer = observerColumn(0);
casacore::ScalarColumn<casacore::String> fieldNameColumn(
fTable, fTable.columnName(casacore::MSField::NAME));
obsInfo.fieldName = fieldNameColumn(fieldRow);
return obsInfo;
}
} // namespace wsclean
|
