* x.rx - x 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
*
fixed 8100 
*
* 2nd line: creation date
* format:  yyyy ddd or yyyy mm dd (0 is valid for all for intial set-up)
*
2007 09 03
*
* 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 0.92
*
* 4th line polarizations available
*
* one of both of lcp and rcp
*
rcp
*
* 5th line: DPFU (degrees/Jansky) for polarizations in previous line in order
*
0.095608
*  
*
* 6th line: gain curve (only one) for ALL polarizations in 4th line
* TYPE FORM COEFFICENTS ...
*
* FORM = POLY only for now
* TYPE - ELEV and ALTAZ only for now
* COEFFICENTS - variable number of number values
*
* maximum coefficents 10
*
ELEV POLY 0.64185929 0.01333665 -0.00012415947
*
* 7th and following lines: tcal versus frequency
*     Format: POL FREQ TCAL
*     where:
*            POL    polarization rcp or lcp
*            FREQ   frequency (MHz)
*            TCAL   degrees K
*
*     MAXIMUM ENTRIES 100, group by polarization
*                          then sorted by increasing freq
*
*rcp 8211.0   20.9
rcp 8212.0 26.5914
rcp 8222.0 27.6103
rcp 8252.0 25.7410
rcp 8312.0 26.7451
rcp 8400.0 26.7491
rcp 8422.0 28.4522
rcp 8502.0 32.9338
rcp 8552.0 27.1787
rcp 8572.0 25.7118
*rcp 8200.0 17.0
*rcp 8600.0 21.4
*
*tcal table ends with end_tcal_table record
*
end_tcal_table
*
* Trec - receiver temperature, degrees K
*
* if value is zero, no opacity corrections are used
*
0.0
*52.4900
*
* Spillover table
*
* format:
* elevation temperature
* where:
*  elevation is angular degrees above horizon
*  temperature is Kelvin degrees of spillover noise
*
*spillover table ends with end_spillover_table record
*
end_spillover_table