* k.rxg - k band receiver parameter definition * * first line: LO values and ranges, format: * type frequencies * if type is range, the two values: lower and upper frequencies * if type is fixed, then the fixed value * frequencies in MHz * range 85000 88000 *fixed 85650 * * 2nd line: creation date * format: yyyy ddd or yyyy mm dd (0 is valid for all for intial set-up) * 2011 10 04 * * 3rd line: FWHM beamwidthm format: * model value * * if type is frequncy, then fwhm=value*1.22*c/(freq*diameter) * value is 1.0 if omitted * if type is constant, then fwhm=value (degrees) * frequency 1.0 * * 4th line polarizations available * * one of both of lcp and rcp * lcp * * 5th line: DPFU (degrees/Jansky) for polarizations in previous line in order * 0.055 * * 6th line: gain curve (only one) for ALL polarizations in 4th line * TYPE FORM COEFFICENTS ... [opacity_corrected] * * FORM = POLY only for now * TYPE - ELEV and ALTAZ only for now * COEFFICENTS - variable number of number values * opacity_corrected - optional final field, if present it indicates that * the curve is opacity corrected * * maximum coefficents 10 * ELEV POLY 0.27 0.0324 -0.00036 opacity_corrected * * 7th and following lines: tcal versus frequency * Format: POL FREQ TCAL * where: * POL polarization rcp or lcp * FREQ frequency (MHz) * TCAL degrees K * * ends with a line containing end_tcal_table * * MAXIMUM ENTRIES 400, group by polarization * then sorted by increasing freq * In mm we do Tcabin -Tcold = 292K - 14K = 278 aprox. lcp 86100 277.4 lcp 90000 277.4 end_tcal_table * * Trec: receiver temperature * 40.0 * * Spill over table * * 9th and following lines: Spillover versus frequency * Format: Elevation Tspill * where: * POL polarization rcp or lcp * FREQ frequency (MHz) * TCAL degrees K * * ends with a line containing end_spillover_table * * MAXIMUM ENTRIES 20 end_spillover_table