[159] | 1 | #include <iostream> |
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| 2 | #include <string> |
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| 3 | #include <string.h> |
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| 4 | #include <wcsunits.h> |
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| 5 | #define WCSLIB_GETWCSTAB // define this so that we don't try and redefine |
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| 6 | // wtbarr (this is a problem when using gcc v.4+ |
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| 7 | #include <fitsio.h> |
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[160] | 8 | #include <longnam.h> |
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[159] | 9 | #include <math.h> |
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| 10 | #include <duchamp.hh> |
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| 11 | #include <Cubes/cubes.hh> |
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| 12 | |
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| 13 | int FitsHeader::readHeaderInfo(string fname, Param &par) |
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| 14 | { |
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[161] | 15 | /** |
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| 16 | * FitsHeader::readHeaderInfo |
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| 17 | * A simple front-end function to the three header access |
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| 18 | * functions defined below. |
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| 19 | * |
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| 20 | */ |
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[159] | 21 | |
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[161] | 22 | int returnValue = SUCCESS; |
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| 23 | |
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[192] | 24 | if(this->readBUNIT(fname)==FAILURE) returnValue=FAILURE; |
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[159] | 25 | |
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[192] | 26 | if(this->readBLANKinfo(fname, par)==FAILURE) returnValue=FAILURE; |
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[159] | 27 | |
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[192] | 28 | if(this->readBeamInfo(fname, par)==FAILURE) returnValue=FAILURE; |
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[159] | 29 | |
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[161] | 30 | return returnValue; |
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[159] | 31 | } |
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| 32 | |
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| 33 | |
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| 34 | ////////////////////////////////////////////////// |
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| 35 | |
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[192] | 36 | int FitsHeader::readBUNIT(string fname) |
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[159] | 37 | { |
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| 38 | /** |
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[192] | 39 | * FitsHeader::readBUNIT(string fname) |
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[159] | 40 | * Read the BUNIT header keyword, to store the units |
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| 41 | * of brightness (flux). |
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| 42 | */ |
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| 43 | fitsfile *fptr; |
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[160] | 44 | char *comment = new char[FLEN_COMMENT]; |
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| 45 | char *unit = new char[FLEN_VALUE]; |
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[159] | 46 | int returnStatus = 0, status = 0; |
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[161] | 47 | |
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| 48 | // Open the FITS file |
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[159] | 49 | status = 0; |
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| 50 | if( fits_open_file(&fptr,fname.c_str(),READONLY,&status) ){ |
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| 51 | fits_report_error(stderr, status); |
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| 52 | return FAILURE; |
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| 53 | } |
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[161] | 54 | |
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| 55 | // Read the BUNIT keyword, and translate to standard unit format if needs be |
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[159] | 56 | fits_read_key(fptr, TSTRING, "BUNIT", unit, comment, &returnStatus); |
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| 57 | if (returnStatus){ |
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[192] | 58 | duchampWarning("readBUNIT","Error reading BUNIT keyword: "); |
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[159] | 59 | fits_report_error(stderr, returnStatus); |
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| 60 | } |
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| 61 | else{ |
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| 62 | wcsutrn(0,unit); |
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| 63 | this->fluxUnits = unit; |
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| 64 | } |
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[161] | 65 | |
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| 66 | // Close the FITS file |
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[159] | 67 | status = 0; |
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| 68 | fits_close_file(fptr, &status); |
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| 69 | if (status){ |
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[192] | 70 | duchampWarning("readBUNIT","Error closing file: "); |
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[159] | 71 | fits_report_error(stderr, status); |
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| 72 | } |
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| 73 | |
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| 74 | delete [] comment, unit; |
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| 75 | |
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| 76 | return returnStatus; |
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| 77 | } |
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| 78 | |
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| 79 | ////////////////////////////////////////////////// |
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| 80 | |
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[192] | 81 | int FitsHeader::readBLANKinfo(string fname, Param &par) |
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[159] | 82 | { |
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| 83 | /** |
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[192] | 84 | * FitsHeader::readBLANKinfo(string fname, Param &par) |
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[159] | 85 | * Reading in the Blank pixel value keywords. |
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| 86 | * If the BLANK keyword is in the header, use that and store the relevant |
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[172] | 87 | * values. Also copy them into the parameter set. |
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[159] | 88 | * If not, use the default value (either the default from param.cc or |
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| 89 | * from the param file) and assume simple values for the keywords |
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| 90 | * --> the scale keyword is the same as the blank value, |
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| 91 | * the blank keyword (which is an int) is 1 and |
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| 92 | * the bzero (offset) is 0. |
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| 93 | */ |
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| 94 | int returnStatus = 0, status = 0; |
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[161] | 95 | if(par.getFlagBlankPix()){ // Only do this if we want the blank pix value |
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| 96 | |
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[160] | 97 | fitsfile *fptr; |
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| 98 | char *comment = new char[FLEN_COMMENT]; |
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| 99 | int blank; |
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| 100 | float bscale, bzero; |
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[161] | 101 | |
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| 102 | // Open the FITS file. |
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[160] | 103 | if( fits_open_file(&fptr,fname.c_str(),READONLY,&status) ){ |
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| 104 | fits_report_error(stderr, status); |
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| 105 | return FAILURE; |
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| 106 | } |
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[161] | 107 | |
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| 108 | // Read the BLANK keyword. |
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| 109 | // If this isn't present, then report the error, and set to |
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| 110 | // the nominal values given in Param |
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| 111 | // If it is, read the other two necessary keywords, and then set |
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| 112 | // the values accordingly. |
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[160] | 113 | if(fits_read_key(fptr, TINT, "BLANK", &blank, comment, &returnStatus)){ |
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[192] | 114 | duchampWarning("readBLANKinfo","Error reading BLANK keyword: "); |
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[160] | 115 | fits_report_error(stderr, returnStatus); |
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| 116 | std::stringstream errmsg; |
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| 117 | errmsg << "Using default BLANK value (" |
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| 118 | << par.getBlankPixVal() << ").\n"; |
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[192] | 119 | duchampWarning("readBLANKinfo", errmsg.str()); |
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[172] | 120 | this->blankKeyword = 1; |
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| 121 | this->bscaleKeyword = par.getBlankPixVal(); |
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| 122 | this->bzeroKeyword = 0; |
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| 123 | par.setBlankKeyword(1); |
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| 124 | par.setBzeroKeyword(0); |
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[160] | 125 | par.setFlagUsingBlank(true); |
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| 126 | } |
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| 127 | else{ |
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| 128 | status = 0; |
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| 129 | fits_read_key(fptr, TFLOAT, "BZERO", &bzero, comment, &status); |
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| 130 | status = 0; |
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| 131 | fits_read_key(fptr, TFLOAT, "BSCALE", &bscale, NULL, &status); |
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[172] | 132 | this->blankKeyword = blank; |
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| 133 | this->bscaleKeyword = bscale; |
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| 134 | this->bzeroKeyword = bzero; |
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| 135 | par.setBlankKeyword(blank); |
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| 136 | par.setBscaleKeyword(bscale); |
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| 137 | par.setBzeroKeyword(bzero); |
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| 138 | par.setBlankPixVal( blank*bscale + bzero ); |
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[160] | 139 | } |
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[159] | 140 | |
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[161] | 141 | // Close the FITS file. |
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[160] | 142 | status = 0; |
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| 143 | fits_close_file(fptr, &status); |
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| 144 | if (status){ |
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[192] | 145 | duchampWarning("readBLANKinfo","Error closing file: "); |
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[160] | 146 | fits_report_error(stderr, status); |
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| 147 | } |
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| 148 | |
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| 149 | delete [] comment; |
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| 150 | |
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[159] | 151 | } |
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[160] | 152 | |
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[159] | 153 | return returnStatus; |
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| 154 | |
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| 155 | } |
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| 156 | |
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| 157 | ////////////////////////////////////////////////// |
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| 158 | |
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[192] | 159 | int FitsHeader::readBeamInfo(string fname, Param &par) |
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[159] | 160 | { |
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| 161 | /** |
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[192] | 162 | * FitsHeader::readBeamInfo(string fname, Param &par) |
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[159] | 163 | * Reading in the beam parameters from the header. |
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| 164 | * Use these, plus the basic WCS parameters to calculate the size of |
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[172] | 165 | * the beam in pixels. Copy the beam size into the parameter set. |
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| 166 | * If information not present in FITS header, use the parameter |
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| 167 | * set to define the beam size. |
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[159] | 168 | */ |
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| 169 | char *comment = new char[80]; |
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[181] | 170 | string keyword[4]={"BMAJ","BMIN","CDELT1","CDELT2"}; |
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[159] | 171 | float bmaj,bmin,cdelt1,cdelt2; |
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[181] | 172 | int status[6]; |
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[159] | 173 | fitsfile *fptr; |
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[161] | 174 | |
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[181] | 175 | for(int i=0;i<6;i++) status[i] = 0; |
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| 176 | |
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[161] | 177 | // Open the FITS file |
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[181] | 178 | if( fits_open_file(&fptr,fname.c_str(),READONLY,&status[0]) ){ |
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| 179 | fits_report_error(stderr, status[0]); |
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[159] | 180 | return FAILURE; |
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| 181 | } |
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[161] | 182 | |
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| 183 | // Read the Keywords -- first look for BMAJ. If it is present, read the |
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| 184 | // others, and calculate the beam size. |
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| 185 | // If it is not, give warning and set beam size to nominal value. |
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[181] | 186 | fits_read_key(fptr, TFLOAT, (char *)keyword[0].c_str(), &bmaj, |
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| 187 | comment, &status[1]); |
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| 188 | fits_read_key(fptr, TFLOAT, (char *)keyword[1].c_str(), &bmin, |
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| 189 | comment, &status[2]); |
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| 190 | fits_read_key(fptr, TFLOAT, (char *)keyword[2].c_str(), &cdelt1, |
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| 191 | comment, &status[3]); |
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| 192 | fits_read_key(fptr, TFLOAT, (char *)keyword[3].c_str(), &cdelt2, |
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| 193 | comment, &status[4]); |
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| 194 | |
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| 195 | if(status[1]||status[2]||status[3]||status[4]){ // error |
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| 196 | stringstream errmsg; |
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| 197 | errmsg << "Header keywords not present: "; |
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| 198 | for(int i=0;i<4;i++) if(status[i+1]) errmsg<<keyword[i]<<" "; |
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| 199 | errmsg << "\nUsing parameter beamSize to determine size of beam.\n"; |
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[192] | 200 | duchampWarning("readBeamInfo",errmsg.str()); |
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[181] | 201 | this->setBeamSize(par.getBeamSize()); |
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| 202 | par.setFlagUsingBeam(true); |
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| 203 | } |
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| 204 | else{ // all keywords present |
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[159] | 205 | this->setBeamSize( M_PI * (bmaj/2.) * (bmin/2.) / fabs(cdelt1*cdelt2) ); |
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| 206 | this->setBmajKeyword(bmaj); |
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| 207 | this->setBminKeyword(bmin); |
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[172] | 208 | par.setBeamSize(this->beamSize); |
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[159] | 209 | } |
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[181] | 210 | |
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[161] | 211 | // Close the FITS file. |
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[181] | 212 | fits_close_file(fptr, &status[5]); |
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| 213 | if (status[5]){ |
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[192] | 214 | duchampWarning("readBeamInfo","Error closing file: "); |
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[181] | 215 | fits_report_error(stderr, status[5]); |
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[159] | 216 | } |
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| 217 | |
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| 218 | delete [] comment; |
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| 219 | |
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[181] | 220 | int returnStatus = status[0]; |
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| 221 | for(int i=1;i<6;i++) if(status[i]>returnStatus) returnStatus=status[i]; |
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| 222 | |
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[159] | 223 | return returnStatus; |
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| 224 | } |
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