LIA 7.3 - Changes since LIA 7.2a

• FP Processing using the FP_PROC procedure
• In LIA 7.2a ground measurements of FP transmission and resolution were used to fully calibrate the observed signal from photocurrent (Amperes) to Flux units (Watts/cm^2/micron). LIA 7.3, however, uses LWS calibration observations of Mars to perform the throughput correction. The throughput is defined to be the product of the FP transmission and the FP resolution element as a function of wavelength for both the short and long wavelength FPs. New internal routine fp_fix used here.
• FP data suffer from a component of straylight mixed in with the detector dark currents. FP_PROC by default subtracts the minimum dark current as determined from a series of dedicated measurements. The true dark current and straylight component lies somewhere between this standard value and the dark current as measured during the actual observation itself. At present it is not possible to know in advance what this 'true' value is. To facilitate this task, FP_PROC now has the option of allowing the user to display full grating scan data (AOT LWS01) on top of the FP data for the source in question. Of course this assumes that the user observed his/her source with the grating as well as the FP.
• Command line keyword /drift included so as to allow the responsivity drift correction for L03 non-raster AOTs. New internal routine called fix_resp_drift used to correct the lspd data.
• LIA version displayed on all widgets and also written to the output lsan header.
• New calibration file: lctp.fits - Contains the coefficients for performing the FP throughput corrections

 
• Other LIA routines:
• LIA version number displayed on widgets for all GUI or plot based routines (i.e. INSPECT_ABS, INSPECT_DRIFT, INSPECT_IPD, INSPECT_RASTER, INSPECT_RSRF and INSPECT_SPD).
• The command line keyword /hardcopy introduced to INSPECT_ABS, INSPECT_DRIFT, INSPECT_IPD and INSPECT_RASTER to allow PostScript plot file generation.
• The CALC_ERRORS routine, used for estimating the uncertainty in grating spectra, now displays the LIA version on the screen. Bug fix to ensure only closed flashes are used to estimate the uncertainty in the absolute correction factor.
• In SHORT_AAL the LIA version is written into the output lsan header. Bug fix to ensure that the lsca file is only opened when the photometric flag is not set and the AOT is L01.

• Extended functionality of the /update keyword in IA_DARK. If you now want to improve the DC subtraction for, say, 1 detector, you do not have to do the job all over again also for the rest of the detectors.