1 | //
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2 | // C++ Implementation: STCalibration
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3 | //
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4 | // Description:
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5 | //
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6 | //
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7 | // Author: Takeshi Nakazato <takeshi.nakazato@nao.ac.jp> (C) 2012
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8 | //
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9 | // Copyright: See COPYING file that comes with this distribution
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10 | //
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11 | //
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12 |
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13 | #include "STCalibration.h"
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14 | #include "STCalSkyTable.h"
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15 | #include "RowAccumulator.h"
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16 | #include "STIdxIter.h"
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17 |
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18 | using namespace casa;
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19 |
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20 | namespace asap {
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21 | STCalibration::STCalibration(CountedPtr<Scantable> &s, const String target_column)
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22 | : scantable_(s),
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23 | target_column_(target_column)
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24 | {
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25 | }
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26 |
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27 | void STCalibration::calibrate()
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28 | {
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29 | STSelector selOrg = scantable_->getSelection();
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30 | setupSelector(selOrg);
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31 | scantable_->setSelection(sel_);
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32 |
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33 | fillCalTable();
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34 |
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35 | scantable_->setSelection(selOrg);
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36 | }
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37 |
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38 | void STCalibration::fillCalTable()
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39 | {
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40 | RowAccumulator acc(W_TINT);
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41 |
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42 | vector<string> cols(3);
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43 | cols[0] = "IFNO";
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44 | cols[1] = "POLNO";
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45 | cols[2] = "BEAMNO";
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46 | STIdxIter2 iter(scantable_, cols);
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47 |
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48 | ROScalarColumn<Double> *tcol = new ROScalarColumn<Double>(scantable_->table(), "TIME");
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49 | Vector<Double> timeSec = tcol->getColumn() * 86400.0;
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50 | tcol->attach(scantable_->table(), "INTERVAL");
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51 | Vector<Double> intervalSec = tcol->getColumn();
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52 | delete tcol;
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53 | ROScalarColumn<Float> *ecol = new ROScalarColumn<Float>(scantable_->table(), "ELEVATION");
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54 | Vector<Float> elevation = ecol->getColumn();
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55 | delete ecol;
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56 |
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57 | ROArrayColumn<Float> specCol(scantable_->table(), target_column_);
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58 | ROArrayColumn<uChar> flagCol(scantable_->table(), "FLAGTRA");
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59 | ROScalarColumn<uInt> freqidCol(scantable_->table(), "FREQ_ID");
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60 |
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61 | // dummy Tsys: the following process doesn't need Tsys but RowAccumulator
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62 | // requires to set it with spectral data
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63 | Vector<Float> tsys(1, 1.0);
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64 |
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65 | Double timeCen = 0.0;
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66 | Float elCen = 0.0;
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67 | uInt count = 0;
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68 |
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69 | while(!iter.pastEnd()) {
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70 | Vector<uInt> rows = iter.getRows(SHARE);
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71 | Record current = iter.currentValue();
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72 | //os_ << "current=" << current << LogIO::POST;
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73 | uInt len = rows.nelements();
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74 | if (len == 0) {
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75 | iter.next();
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76 | continue;
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77 | }
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78 | else if (len == 1) {
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79 | uInt irow = rows[0];
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80 | appenddata(0, 0, current.asuInt("BEAMNO"), current.asuInt("IFNO"), current.asuInt("POLNO"),
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81 | freqidCol(irow), timeSec[irow], elevation[irow], specCol(irow),
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82 | flagCol(irow));
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83 | iter.next();
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84 | continue;
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85 | }
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86 |
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87 | uInt nchan = scantable_->nchan(scantable_->getIF(rows[0]));
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88 | Vector<uChar> flag(nchan);
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89 | Vector<Bool> bflag(nchan);
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90 | Vector<Float> spec(nchan);
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91 |
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92 | Vector<Double> timeSep(len);
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93 | for (uInt i = 0; i < len-1; i++) {
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94 | timeSep[i] = timeSec[rows[i+1]] - timeSec[rows[i]] ;
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95 | }
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96 | Double tMedian = median(timeSep(IPosition(1,0), IPosition(1,len-2)));
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97 | timeSep[len-1] = tMedian * 10000.0 ; // any large value
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98 |
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99 | uInt irow ;
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100 | uInt jrow ;
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101 | for (uInt i = 0; i < len; i++) {
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102 | //os_ << "start row " << rows[i] << LogIO::POST;
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103 | irow = rows[i];
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104 | jrow = (i < len-1) ? rows[i+1] : rows[i];
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105 | // accumulate data
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106 | flagCol.get(irow, flag);
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107 | convertArray(bflag, flag);
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108 | specCol.get(irow, spec);
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109 | if ( !allEQ(bflag,True) )
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110 | acc.add( spec, !bflag, tsys, intervalSec[irow], timeSec[irow] ) ;
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111 | timeCen += timeSec[irow];
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112 | elCen += elevation[irow];
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113 | count++;
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114 |
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115 | // check time gap
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116 | double gap = 2.0 * timeSep[i] / (intervalSec[jrow] + intervalSec[irow]);
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117 | if ( gap > 1.1 ) {
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118 | if ( acc.state() ) {
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119 | acc.replaceNaN() ;
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120 | // const Vector<Bool> &msk = acc.getMask();
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121 | // convertArray(flag, !msk);
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122 | // for (uInt k = 0; k < nchan; ++k) {
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123 | // uChar userFlag = 1 << 7;
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124 | // if (msk[k]==True) userFlag = 0 << 7;
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125 | // flag(k) = userFlag;
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126 | // }
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127 | timeCen /= (Double)count * 86400.0; // sec->day
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128 | elCen /= (Float)count;
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129 | const Vector<Bool> &mask = acc.getMask();
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130 | Vector<uChar> flag(mask.shape(), (uChar)0);
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131 | const uChar userFlag = 1 << 7;
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132 | for (uInt k = 0; k < flag.nelements(); ++k) {
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133 | if (mask[k] == True)
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134 | flag[k] = userFlag;
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135 | }
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136 | appenddata(0, 0, current.asuInt("BEAMNO"), current.asuInt("IFNO"),
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137 | current.asuInt("POLNO"),
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138 | freqidCol(irow), timeCen, elCen,
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139 | acc.getSpectrum(), flag);
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140 | }
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141 | acc.reset() ;
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142 | timeCen = 0.0;
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143 | elCen = 0.0;
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144 | count = 0;
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145 | }
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146 | }
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147 |
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148 | iter.next() ;
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149 | //os_ << "end " << current << LogIO::POST;
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150 | }
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151 | }
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152 |
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153 | }
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