* trc.rxg - C 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 one or two fixed value * frequencies in MHz * range 3900.0 4410.0 *fixed 4200.00 * 2nd line: creation date * format: yyyy ddd or yyyy mm dd (0 is valid for all for intial set-up) * 2010 03 22 * 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 rcp * * 5th line: DPFU (degrees/Jansky) for polarizations in previous line in order * KB comment: is equal to Ae/2760, where Ae is the effective aperture [m^2] *0.1400 0.1312 modified by kb on march 6, 2007 0.1400 0.1400 * * 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 * KB comment: ALTAZ means a function of the (zenith angle/distance in degrees) * COEFFICENTS - variable number of number values * opacity_corrected - optional final field, if present it indicates that * the curve is opacity corrected * * maximum coefficents 10 * *ALTAZ POLY 1.0 -1.0825e-4 -8.377e-7 -5.491e-8 * The above is equivalent to: ELEV POLY 0.943443 1.59335E-3 -1.56634E-5 5.491E-8 * * 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 * * lcp 4880 3.7 lcp 4890 3.7 lcp 4900 3.8 lcp 4910 4. lcp 4920 4.1 lcp 4930 4.2 lcp 4940 4.4 lcp 4950 4.6 lcp 4960 4.75 lcp 4970 4.8 lcp 4980 4.9 lcp 4990 5. lcp 5000 5.05 lcp 5010 5.05 lcp 5020 5. lcp 5030 5. lcp 5040 4.95 lcp 5050 4.9 lcp 5060 4.85 lcp 5070 4.8 lcp 5080 4.75 lcp 5090 4.7 lcp 5100 4.7 rcp 4880 2.7 rcp 4890 2.8 rcp 4900 2.9 rcp 4910 3. rcp 4920 3.1 rcp 4930 3.2 rcp 4940 3.3 rcp 4950 3.4 rcp 4960 3.45 rcp 4970 3.5 rcp 4980 3.5 rcp 4990 3.45 rcp 5000 3.4 rcp 5010 3.35 rcp 5020 3.3 rcp 5030 3.25 rcp 5040 3.25 rcp 5050 3.25 rcp 5060 3.25 rcp 5070 3.25 rcp 5080 3.25 rcp 5090 3.25 rcp 5100 3.25 end_tcal_table * * Trec: receiver temperature * 0.0 * * 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