[3] | 1 | #include <iostream> |
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| 2 | #include <wcs.h> |
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| 3 | #include <Utils/utils.hh> |
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| 4 | |
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| 5 | double pixelToVelocity(wcsprm *wcs, double &x, double &y, double &z) |
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| 6 | { |
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[22] | 7 | /** |
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| 8 | * pixelToVelocity(wcsprm *wcs, double &x, double &y, double &z) |
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| 9 | * Uses wcs to convert the three-dimensional pixel position (x,y,z) |
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| 10 | * to world coordinates. |
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| 11 | * Returns the velocity. |
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| 12 | */ |
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| 13 | |
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[3] | 14 | int *stat = new int[1]; |
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| 15 | double *pixcrd = new double[3]; |
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| 16 | double *imgcrd = new double[3]; |
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| 17 | double *world = new double[3]; |
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| 18 | double *phi = new double[1]; |
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| 19 | double *theta = new double[1]; |
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| 20 | pixcrd[0] = x; |
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| 21 | pixcrd[1] = y; |
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| 22 | pixcrd[2] = z; |
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| 23 | if(int flag=wcsp2s(wcs, 1, 3, pixcrd, imgcrd, phi, theta, world, stat)>0){ |
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[22] | 24 | std::cerr<<"WCS Error in pixelToVelocity(): Code = "<<flag<<": "<<wcs_errmsg[flag]<<std::endl; |
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| 25 | std::cerr<<" stat value is "<<stat[0]<<std::endl; |
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[3] | 26 | } |
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[22] | 27 | |
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| 28 | double vel = setVel_kms(wcs, world[2]); |
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| 29 | |
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[3] | 30 | delete [] stat; |
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| 31 | delete [] pixcrd; |
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| 32 | delete [] imgcrd; |
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| 33 | delete [] world; |
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| 34 | delete [] phi; |
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| 35 | delete [] theta; |
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| 36 | |
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| 37 | return vel; |
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| 38 | } |
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| 39 | |
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| 40 | |
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| 41 | int pixToWCSSingle(wcsprm *wcs, const double *pix, double *world) |
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| 42 | { |
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[22] | 43 | /** |
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| 44 | * pixToWCSSingle(wcsprm *wcs, const double *pix, double *world) |
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| 45 | * Uses wcs to convert the three-dimensional pixel position referenced by pix |
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| 46 | * to world coordinates, which are placed in the array world[]. |
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| 47 | * Assumes that pix only has one point with an x,y,and z pixel positions. |
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| 48 | * Offsets these pixel values by 1 to account for the C arrays being indexed to 0. |
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| 49 | */ |
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| 50 | |
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[3] | 51 | int nelem=3,npts=1,flag; |
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[22] | 52 | |
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| 53 | double *newpix = new double[nelem*npts]; |
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| 54 | for(int i=0;i<nelem*npts;i++) newpix[i] = pix[i] + 1.; |
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| 55 | // correct from 0-indexed to 1-indexed pixel array |
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| 56 | |
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[3] | 57 | int *stat = new int[npts]; |
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| 58 | double *imgcrd = new double[nelem*npts]; |
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| 59 | double *phi = new double[npts]; |
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| 60 | double *theta = new double[npts]; |
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[22] | 61 | if(flag=wcsp2s(wcs, npts, nelem, newpix, imgcrd, phi, theta, world, stat)>0){ |
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[3] | 62 | std::cerr << "WCS Error in pixToWCSSingle(): Code = " <<flag<<": "<<wcs_errmsg[flag]<<std::endl; |
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| 63 | std::cerr << " stat value is " << stat[0] << std::endl; |
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| 64 | } |
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| 65 | delete [] stat; |
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| 66 | delete [] imgcrd; |
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| 67 | delete [] phi; |
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| 68 | delete [] theta; |
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| 69 | return flag; |
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| 70 | } |
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| 71 | |
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| 72 | int wcsToPixSingle(wcsprm *wcs, const double *world, double *pix) |
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| 73 | { |
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[22] | 74 | /** |
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| 75 | * wcsToPixSingle(wcsprm *wcs, const double *world, double *pix) |
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| 76 | * Uses wcs to convert the three-dimensional world coordinate position referenced by world |
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| 77 | * to pixel coordinates, which are placed in the array pix[]. |
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| 78 | * Assumes that world only has one point (three values eg. RA, Dec, Velocity) |
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| 79 | * Offsets the pixel values by 1 to account for the C arrays being indexed to 0. |
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| 80 | */ |
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| 81 | |
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[3] | 82 | int nelem=3,npts=1,flag; |
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| 83 | int *stat = new int[npts]; |
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| 84 | double *imgcrd = new double[nelem*npts]; |
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| 85 | double *phi = new double[npts]; |
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| 86 | double *theta = new double[npts]; |
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| 87 | if(flag=wcss2p(wcs, npts, nelem, world, phi, theta, imgcrd, pix, stat)>0){ |
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| 88 | std::cerr << "WCS Error in wcsToPixSingle(): Code = " <<flag<<": "<<wcs_errmsg[flag]<<std::endl; |
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| 89 | std::cerr << " stat value is " << stat[0] << std::endl; |
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| 90 | } |
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[22] | 91 | |
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| 92 | for(int i=0;i<nelem;i++) pix[i] -= 1.; // correct from 1-indexed to 0-indexed pixel array |
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| 93 | |
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[3] | 94 | delete [] stat; |
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| 95 | delete [] imgcrd; |
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| 96 | delete [] phi; |
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| 97 | delete [] theta; |
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| 98 | return flag; |
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| 99 | } |
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| 100 | |
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[22] | 101 | int pixToWCSMulti(wcsprm *wcs, const double *pix, double *world, const int npts) |
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| 102 | { |
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| 103 | /** |
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| 104 | * pixToWCSSingle(wcsprm *wcs, const double *pix, double *world) |
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| 105 | * Uses wcs to convert the three-dimensional pixel positions referenced by pix |
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| 106 | * to world coordinates, which are placed in the array world[]. |
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| 107 | * pix is assumed to hold the positions of npts points. |
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| 108 | * Offsets these pixel values by 1 to account for the C arrays being indexed to 0. |
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| 109 | */ |
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| 110 | |
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| 111 | int nelem=3,flag; |
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| 112 | |
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| 113 | double *newpix = new double[nelem*npts]; |
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| 114 | for(int i=0;i<nelem*npts;i++) newpix[i] = pix[i] + 1.; |
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| 115 | // correct from 0-indexed to 1-indexed pixel array |
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| 116 | |
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| 117 | int *stat = new int[npts]; |
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| 118 | double *imgcrd = new double[nelem*npts]; |
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| 119 | double *phi = new double[npts]; |
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| 120 | double *theta = new double[npts]; |
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| 121 | if(flag=wcsp2s(wcs, npts, nelem, newpix, imgcrd, phi, theta, world, stat)>0){ |
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| 122 | std::cerr << "WCS Error in pixToWCSSingle(): Code = " <<flag<<": "<<wcs_errmsg[flag]<<std::endl; |
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| 123 | std::cerr << " stat value is " << stat[0] << std::endl; |
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| 124 | } |
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| 125 | delete [] stat; |
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| 126 | delete [] imgcrd; |
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| 127 | delete [] phi; |
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| 128 | delete [] theta; |
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| 129 | return flag; |
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| 130 | } |
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| 131 | |
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| 132 | int wcsToPixMulti(wcsprm *wcs, const double *world, double *pix, const int npts) |
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| 133 | { |
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| 134 | /** |
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| 135 | * wcsToPixSingle(wcsprm *wcs, const double *world, double *pix) |
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| 136 | * Uses wcs to convert the three-dimensional world coordinate position referenced by world |
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| 137 | * to pixel coordinates, which are placed in the array pix[]. |
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| 138 | * world is assumed to hold the positions of npts points. |
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| 139 | * Offsets the pixel values by 1 to account for the C arrays being indexed to 0. |
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| 140 | */ |
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| 141 | int nelem=3,flag; |
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| 142 | int *stat = new int[npts]; |
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| 143 | double *imgcrd = new double[nelem*npts]; |
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| 144 | double *phi = new double[npts]; |
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| 145 | double *theta = new double[npts]; |
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| 146 | if(flag=wcss2p(wcs, npts, nelem, world, phi, theta, imgcrd, pix, stat)>0){ |
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| 147 | std::cerr << "WCS Error in wcsToPixSingle(): Code = " <<flag<<": "<<wcs_errmsg[flag]<<std::endl; |
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| 148 | std::cerr << " stat value is " << stat[0] << std::endl; |
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| 149 | } |
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| 150 | |
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| 151 | for(int i=0;i<nelem;i++) pix[i] -= 1.; // correct from 1-indexed to 0-indexed pixel array |
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| 152 | |
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| 153 | delete [] stat; |
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| 154 | delete [] imgcrd; |
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| 155 | delete [] phi; |
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| 156 | delete [] theta; |
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| 157 | return flag; |
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| 158 | } |
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| 159 | |
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[3] | 160 | float setVel_kms(wcsprm *wcs, const double coord) |
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| 161 | { |
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[22] | 162 | /** |
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| 163 | * setVel_kms(wcsprm *wcs, const double coord) |
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| 164 | * Convert the wcs coordinate given by coord to a velocity in km/s. |
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| 165 | * Does this by checking the ztype parameter in wcs to see if it is FREQ or otherwise, |
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| 166 | * and converts accordingly. |
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| 167 | */ |
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| 168 | |
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[3] | 169 | string ztype = wcs->ctype[2]; |
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| 170 | if(ztype!="FREQ") { |
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| 171 | return coord/1000.; |
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| 172 | } |
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| 173 | else{ |
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| 174 | return C_kms * (wcs->restfrq*wcs->restfrq - coord*coord) / (wcs->restfrq*wcs->restfrq + coord*coord); |
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| 175 | } |
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| 176 | } |
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| 177 | |
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| 178 | double velToCoord(wcsprm *wcs, const float velocity) |
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| 179 | { |
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[22] | 180 | /** |
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| 181 | * velToCoord(wcsprm *wcs, const double coord) |
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| 182 | * Convert the velocity given to the appropriate world coordinate for wcs. |
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| 183 | * Does this by checking the ztype parameter in wcs to see if it is FREQ or otherwise, |
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| 184 | * and converts accordingly. |
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| 185 | */ |
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| 186 | |
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[3] | 187 | string ztype = wcs->ctype[2]; |
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| 188 | if(ztype!="FREQ") |
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| 189 | return velocity * 1000.; |
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| 190 | else |
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| 191 | return wcs->restfrq * (1. - velocity/C_kms) / (1. + velocity/C_kms); |
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| 192 | |
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| 193 | } |
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