Start the observationsΒΆ
$ : commands to insert in a shell
> : commands to insert in the operatorInput panel
: check the execution on the monitor
Insert your project number
> project=[projectID]
Fig.21Initial setup
Select the active surface shape (Parabolic for L-band observations)
> asSetup=P
Fig.4Insert the Local Oscillator value in MHz
> setLO=[freq]
Fig.19Select the receiver mode :
> receiversMode=[code]
where[code]
can beXXC1
,XXC2
,XXC3
,XXC4
,XXC5
,XXL1
,XXL2
,XXL3
,XXL4
,XXL5
.- C is for Circular, L for Linear polarization ;
- 1 : all band, 1300-1800 MHz (no filter) ;
- 2 : 1320-1780 MHz ;
- 3 : 1350-1450 MHz ;
- 4 : 1300-1800 MHz (band-pass) ;
- 5 : 1625-1715 MHz.
Select the Maccaferri filter :
ifd=BW-NARROW
for 115 MHz of bw ;ifd=BW-MEDIUM
for 230 MHz of bw ;ifd=BW-WIDE
for 460 MHz of bw ;ifd=BW-UNFILTERED
.
Select and configure the SARDARA backend in L-band
Set the different parameters of the backend :
> setSection=[sect],*,1500,*,*,[sampleRate],[bin]
Fig.13with :
[sect]
: 0 in full Stokes observations and[sect]
: 0, 1 in non full-stokes observations ;[sampleRate]
in MHz (3000) ;[bin]
the frequency channels (1024 or 16384).
Choose the integration time in ms (e.g. n=10 corresponds to 100 spectra/sec)
> integration=[n]
Put the antenna at 45 deg of elevation before checking that the signal is in the linear range of the backend:
> goTo=*,45d
Fig.15Check that the getTpi command is working correctly before proceeding:
> getTpi
If getTpi=0,0 then there is a problem, you need to ask for help. If getTpi=(a few millions) then proceed.
Attenuate the signal based on the rms range [30;33] and check the value on the interface.
> getRms
> setAttenuation=[sect],[att]
with [att] the attenuation from 0 to 15 dB. Fig.13Check the tsys (typical values 25-30 K)
> tsys
Fig.13Begin the schedule by indicating the start scan [N] or subscan [N_n] in the SCD file :
> startSchedule=[schedulename].scd,[N]
Fig.21