RFM Examples: Nadir Brightness Temperature

Nadir Brightness Temperature
RFM Examples		19AUG24

Description

Off-Nadir viewing Brightness Temperature through the US Std Atmosphere.

*FLG section: NAD flag: downward viewing through a plane parallel atmosphere;; BBT flag: output the brightness temperature spectrum; SFC flag: (mandatory with nadir-viewing) surface is in the line-of-sight
*ATM section: CO2 concentration in the old US Std Atmosphere (330 ppmv) is modified to more recent value of 410 ppmv.
*SEC section: The value 1.015 corresponds to sec(10°), i.e., viewing 10° away from the vertical.
*SFC section: Specifies the surface temperature and emissivity, although in fact the values here (288.2 K is the same as the temperature at the base of the atmosphere in ../atm/usa.atm) are the values that would have been assumed in the absence of any *SFC section.

Driver Table

*HDR 19AUG24 RFM Example: nadir brightness temperature *FLG NAD BBT SFC *SPC 1220 1230 0.1 *GAS CH4 CO2 H2O N2O *ATM ../atm/usa.atm CO2=410 *SEC 1.015 *HIT ../hit/hitran_2016.bin *SFC TEMSFC=288.20 EMSSFC=1.0 *END

Output Files

Output Spectrum

[plot.py]