http://www.stsci.edu/hst/observatory/apertures/siaf.html

<pre>
<b>ACS Aperture File:</b>

Aperture        Reference point             Scales                  Angles              Reference point
name             V2          V3          X           Y         X-axis      Y-axis        X           Y  
                   [arcsec]              [arcsec/pixel]           [degrees]                [pixels] 

JWFM          257.2192    250.1481    0.049475    0.049892     91.9174    177.5981   2072.0000    -26.0000
JWFCFIX       257.6963    238.9052    0.049407    0.049692     91.9988    177.5426   2072.0000    200.0000
JWFC          257.6963    238.9052    0.049407    0.049692     91.9988    177.5426   2072.0000    200.0000
JWFC1FIX      259.5150    198.3120    0.049143    0.048924     92.2965    177.3209   2072.0000   1024.0000
JWFC1         259.5150    198.3120    0.049143    0.048924     92.2965    177.3209   2072.0000   1024.0000
JWFC1IRMP     209.6997    200.4714    0.048222    0.048619     92.6772    176.8871   1048.0000   1024.0000
JWFC1MRMP     310.2168    196.4303    0.049930    0.049193     91.9625    177.7609   3096.0000   1024.0000
JWFC1SMFL     310.2168    196.4303    0.049930    0.049193     91.9625    177.7609   3096.0000   1024.0000
JWFC1P0U      310.3110    196.2260    0.050226    0.049480     91.9588    177.7434   3096.0000   1024.0000
JWFC1P60U     310.2260    196.1540    0.050227    0.049485     91.9542    177.7552   3096.0000   1024.0000
JWFC1P120U    310.2080    196.0970    0.050218    0.049484     91.9614    177.7494   3096.0000   1024.0000
JWFC1P0V      310.4110    195.9770    0.050343    0.049586     91.9786    177.7718   3096.0000   1024.0000
JWFC1P60V     310.2990    195.9370    0.050309    0.049561     91.9779    177.7743   3096.0000   1024.0000
JWFC1P120V    310.2750    195.8590    0.050349    0.049588     91.9715    177.7777   3096.0000   1024.0000
JWFC2FIX      254.9970    301.9390    0.049706    0.050608     91.4469    177.6839   2072.0000   1024.0000
JWFC2         254.9970    301.9390    0.049706    0.050608     91.4469    177.6839   2072.0000   1024.0000
JWFCENTER     259.2753    251.4433    0.049472    0.049832     91.7957    177.4400   2115.0000   2029.0000
JWFC2MRMP     204.5896    303.3164    0.048759    0.050276     91.6913    177.3780   1048.0000   1024.0000
JWFC2ORMP     306.3066    300.7376    0.050512    0.050885     91.2427    177.9902   3096.0000   1024.0000
JWFC2SMFL     204.5896    303.3164    0.048759    0.050276     91.6913    177.3780   1048.0000   1024.0000
JWFC2P0U      204.5060    303.7490    0.049046    0.050571     91.6744    177.3578   1048.0000   1024.0000
JWFC2P60U     204.4440    303.6640    0.049053    0.050580     91.6672    177.3604   1048.0000   1024.0000
JWFC2P120U    204.4320    303.6080    0.049045    0.050578     91.6745    177.3513   1048.0000   1024.0000
JWFC2P0V      204.4680    303.6590    0.049149    0.050695     91.6760    177.3644   1048.0000   1024.0000
JWFC2P60V     204.3770    303.5940    0.049107    0.050662     91.6731    177.3697   1048.0000   1024.0000
JWFC2P120V    204.3590    303.5190    0.049161    0.050701     91.6673    177.3704   1048.0000   1024.0000
JHRM          207.1050    471.4880    0.028686    0.024809    -83.9450      0.3504    531.0000    512.0000
JHRCFIX       207.1050    471.4880    0.028686    0.024809    -83.9450      0.3504    531.0000    512.0000
JHRC          207.1050    471.4880    0.028686    0.024809    -83.9450      0.3504    531.0000    512.0000
JHRCACQ       205.8363    470.1864    0.028664    0.024775    -83.9273      0.3147    575.2000    454.1000
JHRCCOR18     205.8350    470.1870    0.028663    0.024792    -83.9336      0.3281    569.4000    461.8000
JHRCCOR30     208.6700    478.1027    0.028753    0.024960    -83.9968      0.3895    471.9000    791.8000
JHRCOCC08     209.6673    478.1732    0.028766    0.024985    -84.0109      0.4428    443.0000    791.2000
JHRCPR        214.6720    470.7627    0.028735    0.024829    -83.9840      0.4956    741.0000    512.0000
JHRCP0U       207.0790    471.4160    0.028597    0.024744    -84.5744     -0.2950    531.0000    512.0000
JHRCP60U      207.1230    471.5100    0.028587    0.024750    -84.5726     -0.2785    531.0000    512.0000
JHRCP120U     207.1110    471.5380    0.028574    0.024745    -84.5461     -0.3089    531.0000    512.0000
JHRCP0V       206.9870    471.5540    0.028222    0.024432    -83.9627      0.3604    531.0000    512.0000
JHRCP60V      207.0510    471.6350    0.028230    0.024415    -83.9418      0.3603    531.0000    512.0000
JHRCP120V     207.0420    471.7040    0.028249    0.024452    -83.9395      0.4098    531.0000    512.0000
JSBM          207.1050    471.4880    0.034150    0.029535    -83.9450      0.3504    512.0000    512.0000
JSBCFIX       207.1050    471.4880    0.034150    0.029535    -83.9450      0.3504    512.0000    512.0000
JSBC          207.1050    471.4880    0.034150    0.029535    -83.9450      0.3504    512.0000    512.0000
JSBCPR        200.7234    471.4590    0.034084    0.029503    -83.8909      0.2202    432.0000    512.0000
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