OBST>WRASTER <ref_long> /DEFAULT /TIME_LM <T_on> <T_off> /WFRQ <wobble frequency> /SUBSCAN <n repeats> <f: ON First> /MAPSIZE <lon> <res_lon> <lat> <res_lat> <obs_sys> /NOOFFSET
Beam switching for line observations. The parameters describe the total beam throw. The whole procedure can be begun with an ON-source measurement first. The observation has to be started with a START command. If parameters are entered as current values, they remain active until the verb is entered again, unless the /DEFAULT adverb is used to transfer the parameters into the default values.
WRASTER will produce a spectral-line point-raster map according to the rules of MAPSIZE.
The WOBBLE command must have been executed prior to this. (example: WOB /W_POS -60 120)
Integration time in sec. These parameters can be
different for ON-position measurements and OFF (REF)
measurements. If only the first parameter is given in the input line,
the reference time is calculated to be <T_on
SQRT(<n_ons_per_off>).
NOTE: the observation does not finish exactly at the time given, but rather when the next complete backend cycle has been accumulated. For example, if the data transfer interval for the AOS were set to 30 sec, a value of 35 sec in this ADVERB would cause an integration of 60 sec.
EXAMPLE:
Default TIME_LM 30 60
Default ON_OFFS 3
/TIME 40 * yields a 40-sec ON, and a 60-sec OFF (REF), /TIME 40 yields a 40-sec ON, and a 69-sec OFF, /TIME * yields a 30-sec ON, and a 52-sec OFF.
Number of subscans. If the second parameter starts with an F, an ON-OFF cycle will be started with the ON phase first. Otherwise the REF position will be measured first.