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== grasp_save_ota == |
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This is a special version of grasp_save which creates FITS files with a bit more than the minimal contents generated by grasp_save. For a specific application, it may be necessary to augment the FITS files with other tools later, or generate an enhanced version of grasp_save. In the latter case, grasp_save_ota can serve as an example. The following table summarizes some of the differences: |
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||'''Feature'''||grasp_save?||grasp_save_ota?|| |
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||Basic FITS support||yes||yes|| |
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||Keep or subtract pedestal values ("-3" option)||yes||yes|| |
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||Automatically generate MEF when multiple amplifiers?||yes||yes|| |
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||Request pixels on a specific network interface ("-i" option)||no||yes|| |
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||Sequentially save up to 8 OTA cell rows ("-r" option)||no||yes|| |
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||WCS Keywords ("-w" option)||no||yes|| |
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Another way to determine if you need grasp_save_ota (or parts of it, incorporated into a grasp_save customized for your detector) is to look at the keywords you want to end up with in the file. |
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Source of some of the FITS keywords: |
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||'''Keywords'''||'''Source'''|| |
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||SIMPLE, BITPIX, NAXIS*, BZERO, BSCALE, [N]EXTEND, XTENSION, EXTNAME||grasp_save basic keywords|| |
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||CONTROLR='STARGRASP', CON*||supplied to grasp_save by controller|| |
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||PONTIME||supplied to grasp_save by controller|| |
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||DETTEM||supplied to grasp_save by controller (only meaningful if hw exists.)|| |
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||CELLMODE||supplied to grasp_save by controller (only meaningful for OTAs)|| |
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||CLV_*, ADC_*, DAC_*||supplied to grasp_save by controller (describes all timing and volts.)|| |
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||TSP_*||supplied to grasp_save_ota by controller (internal controller time stamping)|| |
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||IMAGESWV, DATE, FILENAME, DARKTIME||grasp_save_ota (should also be done by grasp_save, but it isn't right now)|| |
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||CCDSUM, DETSIZE, DATASEC, BIASSEC, DETSEC, LTV*, LTM*, ATV*, ATM*||grasp_save_ota, Iraf-style region sections|| |
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||IMNAXIS*, IMTM*, IMNPIX*, CNAXIS*, CNPIX*, CCDBIN*, PRESCAN*, OVRSCAN*||grasp_save_ota, Vista-style regions|| |
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||CELLGAP*, FPPOS||grasp_save_ota, OTA-specific keywords|| |
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||WCSNAME*, CTYPE*, CUNIT*, CRVAL*, CRPIX*, CDELT*, CD?_?||grasp_save_ota -w|| |
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||MJD-OBS, EXPTIME, SHUTSTAT, SHUT*||fsnap_[shutter] postprocessor|| |
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||INSTRUME, CMMTOBS, OBSTYPE, EXPREQ, ...||fsnap_[instrument] postprocessor|| |
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||ORIGIN, TELESCOP, AIRMASS, RA/DEC, etc. ||fsnap_[telescope] postprocessor (e.g., fsnap_gpc_otis)|| |
