[2917] | 1 | #include <vector> |
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| 2 | |
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| 3 | #include <casa/Arrays/Vector.h> |
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| 4 | #include <casa/BasicSL/String.h> |
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| 5 | #include <casa/Utilities/CountedPtr.h> |
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| 6 | |
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| 7 | #include "Scantable.h" |
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| 8 | #include "STTcal.h" |
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| 9 | #include "STIdxIter.h" |
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| 10 | #include "STSelector.h" |
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| 11 | |
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| 12 | using namespace casa; |
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| 13 | using namespace asap; |
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| 14 | |
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| 15 | namespace { |
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| 16 | // Interpolation Helper |
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| 17 | class TcalData |
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| 18 | { |
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| 19 | public: |
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| 20 | TcalData(CountedPtr<Scantable> s) |
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| 21 | : table_(s) |
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| 22 | {} |
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| 23 | ~TcalData() {} |
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| 24 | const String method_name() const {return "getTcalFromTime";} |
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| 25 | uInt nrow() const {return table_->nrow();} |
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| 26 | Vector<Float> GetEntry(int idx) const |
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| 27 | { |
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| 28 | String time; |
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| 29 | uInt tcalid = table_->getTcalId(idx); |
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| 30 | Vector<Float> return_value; |
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| 31 | table_->tcal().getEntry(time, return_value, tcalid); |
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| 32 | return return_value; |
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| 33 | } |
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| 34 | private: |
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| 35 | CountedPtr<Scantable> table_; |
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| 36 | }; |
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| 37 | |
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| 38 | class TsysData |
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| 39 | { |
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| 40 | public: |
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| 41 | TsysData(CountedPtr<Scantable> s) |
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| 42 | : tsyscolumn_(s->table(), "TSYS") |
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| 43 | {} |
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| 44 | ~TsysData() {} |
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| 45 | const String method_name() const {return "getTsysFromTime";} |
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| 46 | uInt nrow() const {return tsyscolumn_.nrow();} |
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[2919] | 47 | Vector<Float> GetEntry(int idx) const {return tsyscolumn_(idx);} |
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[2917] | 48 | private: |
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| 49 | ROArrayColumn<Float> tsyscolumn_; |
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| 50 | }; |
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| 51 | |
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| 52 | class SpectralData |
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| 53 | { |
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| 54 | public: |
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| 55 | SpectralData(Matrix<Float> s) |
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| 56 | : data_(s) |
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| 57 | {} |
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| 58 | ~SpectralData() {} |
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| 59 | const String method_name() const {return "getSpectraFromTime";} |
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| 60 | uInt nrow() const {return data_.ncolumn();} |
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[2919] | 61 | Vector<Float> GetEntry(int idx) const {return data_.column(idx);} |
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[2917] | 62 | private: |
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| 63 | Matrix<Float> data_; |
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| 64 | }; |
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| 65 | |
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| 66 | |
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| 67 | vector<int> getRowIdFromTime(double reftime, const Vector<Double> &t) |
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| 68 | { |
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| 69 | // double reft = reftime ; |
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| 70 | double dtmin = 1.0e100 ; |
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| 71 | double dtmax = -1.0e100 ; |
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| 72 | // vector<double> dt ; |
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| 73 | int just_before = -1 ; |
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| 74 | int just_after = -1 ; |
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| 75 | Vector<Double> dt = t - reftime ; |
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| 76 | for ( unsigned int i = 0 ; i < dt.size() ; i++ ) { |
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| 77 | if ( dt[i] > 0.0 ) { |
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| 78 | // after reftime |
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| 79 | if ( dt[i] < dtmin ) { |
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| 80 | just_after = i ; |
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| 81 | dtmin = dt[i] ; |
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| 82 | } |
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| 83 | } |
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| 84 | else if ( dt[i] < 0.0 ) { |
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| 85 | // before reftime |
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| 86 | if ( dt[i] > dtmax ) { |
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| 87 | just_before = i ; |
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| 88 | dtmax = dt[i] ; |
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| 89 | } |
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| 90 | } |
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| 91 | else { |
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| 92 | // just a reftime |
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| 93 | just_before = i ; |
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| 94 | just_after = i ; |
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| 95 | dtmax = 0 ; |
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| 96 | dtmin = 0 ; |
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| 97 | break ; |
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| 98 | } |
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| 99 | } |
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| 100 | |
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| 101 | vector<int> v(2) ; |
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| 102 | v[0] = just_before ; |
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| 103 | v[1] = just_after ; |
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| 104 | |
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| 105 | return v ; |
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| 106 | } |
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| 107 | |
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| 108 | template<class T> |
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| 109 | class SimpleInterpolationHelper |
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| 110 | { |
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| 111 | public: |
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| 112 | static Vector<Float> GetFromTime(double reftime, |
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| 113 | const Vector<Double> &timeVec, |
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| 114 | const vector<int> &idx, |
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| 115 | const T &data, |
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| 116 | const string mode) |
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| 117 | { |
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| 118 | Vector<Float> return_value; |
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| 119 | LogIO os_; |
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| 120 | LogIO os( LogOrigin( "STMath", data.method_name(), WHERE ) ) ; |
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| 121 | if ( data.nrow() == 0 ) { |
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| 122 | os << LogIO::SEVERE << "No row in the input scantable. Return empty tcal." << LogIO::POST ; |
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| 123 | } |
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| 124 | else if ( data.nrow() == 1 ) { |
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| 125 | return_value = data.GetEntry(0); |
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| 126 | } |
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| 127 | else { |
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| 128 | if ( mode == "before" ) { |
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| 129 | int id = -1 ; |
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| 130 | if ( idx[0] != -1 ) { |
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| 131 | id = idx[0] ; |
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| 132 | } |
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| 133 | else if ( idx[1] != -1 ) { |
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| 134 | os << LogIO::WARN << "Failed to find a scan before reftime. return a spectrum just after the reftime." << LogIO::POST ; |
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| 135 | id = idx[1] ; |
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| 136 | } |
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| 137 | |
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| 138 | return_value = data.GetEntry(id); |
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| 139 | } |
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| 140 | else if ( mode == "after" ) { |
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| 141 | int id = -1 ; |
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| 142 | if ( idx[1] != -1 ) { |
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| 143 | id = idx[1] ; |
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| 144 | } |
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| 145 | else if ( idx[0] != -1 ) { |
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| 146 | os << LogIO::WARN << "Failed to find a scan after reftime. return a spectrum just before the reftime." << LogIO::POST ; |
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| 147 | id = idx[1] ; |
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| 148 | } |
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| 149 | |
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| 150 | return_value = data.GetEntry(id); |
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| 151 | } |
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| 152 | else if ( mode == "nearest" ) { |
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| 153 | int id = -1 ; |
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| 154 | if ( idx[0] == -1 ) { |
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| 155 | id = idx[1] ; |
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| 156 | } |
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| 157 | else if ( idx[1] == -1 ) { |
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| 158 | id = idx[0] ; |
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| 159 | } |
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| 160 | else if ( idx[0] == idx[1] ) { |
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| 161 | id = idx[0] ; |
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| 162 | } |
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| 163 | else { |
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| 164 | double t0 = timeVec[idx[0]] ; |
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| 165 | double t1 = timeVec[idx[1]] ; |
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| 166 | if ( abs( t0 - reftime ) > abs( t1 - reftime ) ) { |
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| 167 | id = idx[1] ; |
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| 168 | } |
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| 169 | else { |
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| 170 | id = idx[0] ; |
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| 171 | } |
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| 172 | } |
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| 173 | return_value = data.GetEntry(id); |
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| 174 | } |
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| 175 | else if ( mode == "linear" ) { |
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| 176 | if ( idx[0] == -1 ) { |
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| 177 | // use after |
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| 178 | os << LogIO::WARN << "Failed to interpolate. return a spectrum just after the reftime." << LogIO::POST ; |
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| 179 | int id = idx[1] ; |
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| 180 | return_value = data.GetEntry(id); |
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| 181 | } |
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| 182 | else if ( idx[1] == -1 ) { |
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| 183 | // use before |
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| 184 | os << LogIO::WARN << "Failed to interpolate. return a spectrum just before the reftime." << LogIO::POST ; |
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| 185 | int id = idx[0] ; |
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| 186 | return_value = data.GetEntry(id); |
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| 187 | } |
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| 188 | else if ( idx[0] == idx[1] ) { |
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| 189 | // use before |
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| 190 | //os << "No need to interporate." << LogIO::POST ; |
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| 191 | int id = idx[0] ; |
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| 192 | return_value = data.GetEntry(id); |
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| 193 | } |
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| 194 | else { |
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| 195 | // do interpolation |
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| 196 | |
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| 197 | double t0 = timeVec[idx[0]] ; |
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| 198 | double t1 = timeVec[idx[1]] ; |
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| 199 | Vector<Float> value0 = data.GetEntry(idx[0]); |
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| 200 | Vector<Float> value1 = data.GetEntry(idx[1]); |
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| 201 | double tfactor = (reftime - t0) / (t1 - t0) ; |
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| 202 | for ( unsigned int i = 0 ; i < value0.size() ; i++ ) { |
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| 203 | value1[i] = ( value1[i] - value0[i] ) * tfactor + value0[i] ; |
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| 204 | } |
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| 205 | return_value = value1; |
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| 206 | } |
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| 207 | } |
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| 208 | else { |
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| 209 | os << LogIO::SEVERE << "Unknown mode" << LogIO::POST ; |
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| 210 | } |
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| 211 | } |
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| 212 | return return_value ; |
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| 213 | } |
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| 214 | }; |
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| 215 | |
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[2919] | 216 | // Calibration Helper |
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| 217 | class CalibrationHelper |
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| 218 | { |
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| 219 | public: |
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| 220 | static void CalibrateALMA( CountedPtr<Scantable>& out, |
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| 221 | const CountedPtr<Scantable>& on, |
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| 222 | const CountedPtr<Scantable>& off, |
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| 223 | const Vector<uInt>& rows ) |
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| 224 | { |
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| 225 | // 2012/05/22 TN |
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| 226 | // Assume that out has empty SPECTRA column |
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| 227 | |
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| 228 | // if rows is empty, just return |
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| 229 | if ( rows.nelements() == 0 ) |
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| 230 | return ; |
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| 231 | |
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| 232 | ROArrayColumn<Float> in_spectra_column(on->table(), "SPECTRA"); |
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| 233 | ROArrayColumn<Float> in_tsys_column(on->table(), "TSYS"); |
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| 234 | ROArrayColumn<uChar> in_flagtra_column(on->table(), "FLAGTRA"); |
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| 235 | ArrayColumn<Float> out_spectra_column(out->table(), "SPECTRA"); |
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| 236 | ArrayColumn<uChar> out_flagtra_column(out->table(), "FLAGTRA"); |
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| 237 | |
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| 238 | Vector<Double> timeVec = GetScalarColumn<Double>(off->table(), "TIME"); |
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| 239 | Vector<Double> refTimeVec = GetScalarColumn<Double>(on->table(), "TIME"); |
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| 240 | SpectralData offspectra(Matrix<Float>(GetArrayColumn<Float>(off->table(), "SPECTRA"))); |
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| 241 | unsigned int spsize = on->nchan( on->getIF(rows[0]) ) ; |
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| 242 | vector<int> ids( 2 ) ; |
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| 243 | for ( int irow = 0 ; irow < rows.nelements() ; irow++ ) { |
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| 244 | uInt row = rows[irow]; |
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| 245 | double reftime = refTimeVec[row]; |
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| 246 | ids = getRowIdFromTime( reftime, timeVec ) ; |
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| 247 | Vector<Float> spoff = SimpleInterpolationHelper<SpectralData>::GetFromTime(reftime, timeVec, ids, offspectra, "linear"); |
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| 248 | Vector<Float> spec = in_spectra_column(row); |
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| 249 | Vector<Float> tsys = in_tsys_column(row); |
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| 250 | Vector<uChar> flag = in_flagtra_column(row); |
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| 251 | // ALMA Calibration |
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| 252 | // |
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| 253 | // Ta* = Tsys * ( ON - OFF ) / OFF |
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| 254 | // |
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| 255 | // 2010/01/07 Takeshi Nakazato |
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| 256 | unsigned int tsyssize = tsys.nelements() ; |
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| 257 | for ( unsigned int j = 0 ; j < spsize ; j++ ) { |
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| 258 | if ( spoff[j] == 0.0 ) { |
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| 259 | spec[j] = 0.0 ; |
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| 260 | flag[j] = (uChar)True; |
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| 261 | } |
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| 262 | else { |
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| 263 | spec[j] = ( spec[j] - spoff[j] ) / spoff[j] ; |
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| 264 | } |
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| 265 | spec[j] *= (tsyssize == spsize) ? tsys[j] : tsys[0]; |
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| 266 | } |
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| 267 | out_spectra_column.put(row, spec); |
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| 268 | out_flagtra_column.put(row, flag); |
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| 269 | } |
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| 270 | } |
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| 271 | static void CalibrateChopperWheel( CountedPtr<Scantable> &out, |
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| 272 | const CountedPtr<Scantable>& on, |
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| 273 | const CountedPtr<Scantable>& off, |
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| 274 | const CountedPtr<Scantable>& sky, |
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| 275 | const CountedPtr<Scantable>& hot, |
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| 276 | const CountedPtr<Scantable>& cold, |
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| 277 | const Vector<uInt> &rows ) |
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| 278 | { |
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| 279 | // 2012/05/22 TN |
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| 280 | // Assume that out has empty SPECTRA column |
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| 281 | |
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| 282 | // if rows is empty, just return |
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| 283 | if ( rows.nelements() == 0 ) |
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| 284 | return ; |
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| 285 | |
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| 286 | string antenna_name = out->getAntennaName(); |
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| 287 | ROArrayColumn<Float> in_spectra_column(on->table(), "SPECTRA"); |
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| 288 | ROArrayColumn<uChar> in_flagtra_column(on->table(), "FLAGTRA"); |
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| 289 | ArrayColumn<Float> out_spectra_column(out->table(), "SPECTRA"); |
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| 290 | ArrayColumn<uChar> out_flagtra_column(out->table(), "FLAGTRA"); |
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| 291 | ArrayColumn<Float> out_tsys_column(out->table(), "TSYS"); |
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| 292 | |
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| 293 | Vector<Double> timeOff = GetScalarColumn<Double>(off->table(), "TIME"); |
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| 294 | Vector<Double> timeSky = GetScalarColumn<Double>(sky->table(), "TIME"); |
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| 295 | Vector<Double> timeHot = GetScalarColumn<Double>(hot->table(), "TIME"); |
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| 296 | Vector<Double> timeOn = GetScalarColumn<Double>(on->table(), "TIME"); |
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| 297 | SpectralData offspectra(Matrix<Float>(GetArrayColumn<Float>(off->table(), "SPECTRA"))); |
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| 298 | SpectralData skyspectra(Matrix<Float>(GetArrayColumn<Float>(sky->table(), "SPECTRA"))); |
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| 299 | SpectralData hotspectra(Matrix<Float>(GetArrayColumn<Float>(hot->table(), "SPECTRA"))); |
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| 300 | TcalData tcaldata(sky); |
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| 301 | TsysData tsysdata(sky); |
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| 302 | unsigned int spsize = on->nchan( on->getIF(rows[0]) ) ; |
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| 303 | vector<int> ids( 2 ) ; |
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| 304 | for ( int irow = 0 ; irow < rows.nelements() ; irow++ ) { |
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| 305 | uInt row = rows[irow]; |
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| 306 | double reftime = timeOn[row]; |
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| 307 | ids = getRowIdFromTime( reftime, timeOff ) ; |
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| 308 | Vector<Float> spoff = SimpleInterpolationHelper<SpectralData>::GetFromTime(reftime, timeOff, ids, offspectra, "linear"); |
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| 309 | ids = getRowIdFromTime( reftime, timeSky ) ; |
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| 310 | Vector<Float> spsky = SimpleInterpolationHelper<SpectralData>::GetFromTime(reftime, timeSky, ids, skyspectra, "linear"); |
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| 311 | Vector<Float> tcal = SimpleInterpolationHelper<TcalData>::GetFromTime(reftime, timeSky, ids, tcaldata, "linear"); |
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| 312 | Vector<Float> tsys = SimpleInterpolationHelper<TsysData>::GetFromTime(reftime, timeSky, ids, tsysdata, "linear"); |
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| 313 | ids = getRowIdFromTime( reftime, timeHot ) ; |
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| 314 | Vector<Float> sphot = SimpleInterpolationHelper<SpectralData>::GetFromTime(reftime, timeHot, ids, hotspectra, "linear"); |
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| 315 | Vector<Float> spec = in_spectra_column(row); |
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| 316 | Vector<uChar> flag = in_flagtra_column(row); |
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| 317 | if ( antenna_name.find( "APEX" ) != String::npos ) { |
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| 318 | // using gain array |
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| 319 | for ( unsigned int j = 0 ; j < tcal.size() ; j++ ) { |
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| 320 | if ( spoff[j] == 0.0 || (sphot[j]-spsky[j]) == 0.0 ) { |
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| 321 | spec[j] = 0.0 ; |
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| 322 | flag[j] = (uChar)True; |
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| 323 | } |
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| 324 | else { |
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| 325 | spec[j] = ( ( spec[j] - spoff[j] ) / spoff[j] ) |
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| 326 | * ( spsky[j] / ( sphot[j] - spsky[j] ) ) * tcal[j] ; |
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| 327 | } |
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| 328 | } |
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| 329 | } |
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| 330 | else { |
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| 331 | // Chopper-Wheel calibration (Ulich & Haas 1976) |
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| 332 | for ( unsigned int j = 0 ; j < tcal.size() ; j++ ) { |
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| 333 | if ( (sphot[j]-spsky[j]) == 0.0 ) { |
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| 334 | spec[j] = 0.0 ; |
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| 335 | flag[j] = (uChar)True; |
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| 336 | } |
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| 337 | else { |
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| 338 | spec[j] = ( spec[j] - spoff[j] ) / ( sphot[j] - spsky[j] ) * tcal[j] ; |
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| 339 | } |
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| 340 | } |
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| 341 | } |
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| 342 | out_spectra_column.put(row, spec); |
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| 343 | out_flagtra_column.put(row, flag); |
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| 344 | out_tsys_column.put(row, tsys); |
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| 345 | } |
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| 346 | } |
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| 347 | static void GetSelector(STSelector &sel, const vector<string> &names, const Record &values) |
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| 348 | { |
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| 349 | stringstream ss ; |
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| 350 | ss << "SELECT FROM $1 WHERE "; |
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| 351 | string separator = ""; |
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| 352 | for (vector<string>::const_iterator i = names.begin(); i != names.end(); ++i) { |
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| 353 | ss << separator << *i << "=="; |
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| 354 | switch (values.dataType(*i)) { |
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| 355 | case TpUInt: |
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| 356 | ss << values.asuInt(*i); |
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| 357 | break; |
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| 358 | case TpInt: |
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| 359 | ss << values.asInt(*i); |
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| 360 | break; |
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| 361 | case TpFloat: |
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| 362 | ss << values.asFloat(*i); |
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| 363 | break; |
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| 364 | case TpDouble: |
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| 365 | ss << values.asDouble(*i); |
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| 366 | break; |
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| 367 | case TpComplex: |
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| 368 | ss << values.asComplex(*i); |
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| 369 | break; |
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| 370 | case TpString: |
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| 371 | ss << values.asString(*i); |
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| 372 | break; |
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| 373 | default: |
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| 374 | break; |
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| 375 | } |
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| 376 | separator = "&&"; |
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| 377 | } |
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| 378 | sel.setTaQL(ss.str()); |
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| 379 | } |
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| 380 | private: |
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| 381 | template<class T> |
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| 382 | static Vector<T> GetScalarColumn(const Table &table, const String &name) |
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| 383 | { |
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| 384 | ROScalarColumn<T> column(table, name); |
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| 385 | return column.getColumn(); |
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| 386 | } |
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| 387 | template<class T> |
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| 388 | static Array<T> GetArrayColumn(const Table &table, const String &name) |
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| 389 | { |
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| 390 | ROArrayColumn<T> column(table, name); |
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| 391 | return column.getColumn(); |
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| 392 | } |
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| 393 | }; |
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[2917] | 394 | |
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[2919] | 395 | class AlmaCalibrator |
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| 396 | { |
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| 397 | public: |
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| 398 | AlmaCalibrator(CountedPtr<Scantable> &out, |
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| 399 | const CountedPtr<Scantable> &on, |
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| 400 | const CountedPtr<Scantable> &off) |
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| 401 | : target_(out), |
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| 402 | selector_(), |
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| 403 | on_(on), |
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| 404 | off_(off) |
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| 405 | {} |
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| 406 | ~AlmaCalibrator() {} |
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| 407 | CountedPtr<Scantable> target() const {return target_;} |
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| 408 | void Process(const vector<string> &cols, const Record &values, const Vector<uInt> &rows) { |
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| 409 | CalibrationHelper::GetSelector(selector_, cols, values); |
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| 410 | off_->setSelection(selector_); |
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| 411 | CalibrationHelper::CalibrateALMA(target_, on_, off_, rows); |
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| 412 | off_->unsetSelection(); |
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| 413 | } |
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| 414 | private: |
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| 415 | CountedPtr<Scantable> target_; |
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| 416 | STSelector selector_; |
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| 417 | const CountedPtr<Scantable> on_; |
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| 418 | const CountedPtr<Scantable> off_; |
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| 419 | }; |
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| 420 | |
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| 421 | class ChopperWheelCalibrator |
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| 422 | { |
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| 423 | public: |
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| 424 | ChopperWheelCalibrator(CountedPtr<Scantable> &out, |
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| 425 | const CountedPtr<Scantable> &on, |
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| 426 | const CountedPtr<Scantable> &sky, |
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| 427 | const CountedPtr<Scantable> &off, |
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| 428 | const CountedPtr<Scantable> &hot, |
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| 429 | const CountedPtr<Scantable> &cold) |
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| 430 | : target_(out), |
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| 431 | selector_(), |
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| 432 | on_(on), |
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| 433 | off_(off), |
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| 434 | sky_(sky), |
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| 435 | hot_(hot), |
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| 436 | cold_(cold) |
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| 437 | {} |
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| 438 | ~ChopperWheelCalibrator() {} |
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| 439 | CountedPtr<Scantable> target() const {return target_;} |
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| 440 | void Process(const vector<string> &cols, const Record &values, const Vector<uInt> &rows) { |
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| 441 | CalibrationHelper::GetSelector(selector_, cols, values); |
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| 442 | off_->setSelection(selector_); |
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| 443 | sky_->setSelection(selector_); |
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| 444 | hot_->setSelection(selector_); |
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| 445 | CalibrationHelper::CalibrateChopperWheel(target_, on_, off_, sky_, hot_, cold_, rows); |
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| 446 | off_->unsetSelection(); |
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| 447 | sky_->unsetSelection(); |
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| 448 | hot_->unsetSelection(); |
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| 449 | } |
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| 450 | private: |
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| 451 | CountedPtr<Scantable> target_; |
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| 452 | STSelector selector_; |
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| 453 | const CountedPtr<Scantable> on_; |
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| 454 | const CountedPtr<Scantable> off_; |
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| 455 | const CountedPtr<Scantable> sky_; |
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| 456 | const CountedPtr<Scantable> hot_; |
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| 457 | const CountedPtr<Scantable> cold_; |
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| 458 | }; |
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| 459 | |
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[2917] | 460 | } // anonymous namespace |
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