Previous: UV_TRACKS /TABLE
[ASTRO\]UV_TRACKS ... /WEIGHT Mode [JyPerK Bandwidth] /TABLE [Name
[/FRAME Size]] [/HOUR_ANGLE Hmin [Hmax]] [/HORIZON Elmin] [/INTEGRATION
t] [/STATIONS ALL|list]
In the output UV table, the weight is by default constant, equal to 1.
This can be modified using the /WEIGHT Mode option. Mode can be UNIFORM
(constant weight), AIRMASS (weight proportional to airmass^-2, i.e. to
sin(elevation)^2) or FULL.
With the option /WEIGHT FULL the weights are computed from the system
temperature, derived from the frequency and receiver temperature. This
option requires two additional arguments to specify the antenna gain
(conversion from Jy to K, about 30 for ALMA below 350 GHz, between 22
and 35, depending on the frequency for NOEMA) and the channel width (in
MHz). The frequency is derived from variable FREQUENCY. If FREQUENCY is
equal to FREQ_SIG, the image frequency defined by FREQ_IMA and sideband
gain ration (GAIN_IMAGE) are also used as in the ATM command. Else,
GAIN_IMAGE is set to zero.