.. SRT procedures documentation master file, created by sphinx-quickstart on Mon Aug 7 16:44:28 2017. You can adapt this file completely to your liking, but it should at least contain the root `toctree` directive. .. toctree:: :maxdepth: 1 .. _start-SPKSk: Start the observations ====================== $ : commands to insert in a shell > : commands to insert in the operatorInput panel .. |logo| image:: monocle_.png .. :width: 20pt .. :height: 20pt .. :align: left |logo|: check the execution on the monitor ====================== #. Insert your project number ``> project=[projectID]`` |logo| :numref:`srt_scheduler` #. Initial setup ``> antennaReset`` ``> setupKKG`` |logo| :numref:`srt_receivers_KKG` #. Select the active surface shape (Shaped configuration for K-band observations) ``> asSetup=S`` |logo| :numref:`srt_activesurface` #. Insert the Local Oscillator value in MHz ``> setLO=[freq]`` |logo| :numref:`srt_receivers_KKG` #. Follow the link below to perform the pointing and focus optimization (if not already included in your schedule) : :ref:`pointing-focus` #. Select and configure the SKARAB backend in K-band ``> chooseBackend=Skarab`` |logo| :numref:`srt_scheduler` .. ``$ genericBackendTui BACKENDS/Sardara`` ``> initialize=[code]`` with : - ``[code]`` = configuration : Band - Modality - Channels - ``[code]`` = SKARAB_1 : 1400 - No Stokes - 2048 - ``[code]`` = SKARAB_2 : 1400 - Stokes - 2048 - ``[code]`` = SKARAB_3 : 750 - Stokes - 8192 - ``[code]`` = SKARAB_4 : 640 - Stokes - 8192 - ``[code]`` = SKARAB_5 : 512 - Stokes - 8192 - ``[code]`` = SKARAB_6 : 375 - Stokes - 32768 - ``[code]`` = SKARAB_7 : 320 - Stokes - 32768 - ``[code]`` = SKARAB_8 : 256 - Stokes - 32768 - ``[code]`` = SKARAB_9 : 187.5 - Stokes - 32768 - ``[code]`` = SKARAB_10 : 187.5 - No Stokes - 65536 - ``[code]`` = SKARAB_11 : 160 - Stokes - 32768 - ``[code]`` = SKARAB_12 : 160 - No Stokes - 65536 - ``[code]`` = SKARAB_13 : 128 - Stokes - 32768 - ``[code]`` = SKARAB_14 : 128 - No Stokes - 65536 - ``[code]`` = SKARAB_15 : 93.75 - Stokes - 32768 - ``[code]`` = SKARAB_16 : 93.75 - No Stokes - 65536 - ``[code]`` = SKARAB_17 : 80 - Stokes - 32768 - ``[code]`` = SKARAB_18 : 80 - No Stokes - 65536 - ``[code]`` = SKARAB_19 : 64 - Stokes - 32768 - ``[code]`` = SKARAB_20 : 64 - No Stokes - 65536 - ``[code]`` = SKARAB_21 : 46.875 - Stokes - 32768 - ``[code]`` = SKARAB_22 : 46.875 - No Stokes - 65536 - ``[code]`` = SKARAB_23 : 40 - Stokes - 32768 - ``[code]`` = SKARAB_24 : 40 - No Stokes - 65536 - ``[code]`` = SKARAB_25 : 32 - Stokes - 32768 - ``[code]`` = SKARAB_26 : 32 - No Stokes - 65536 - ``[code]`` = SKARAB_27 : 23.4375 - Stokes - 32768 - ``[code]`` = SKARAB_28 : 23.4375 - No Stokes - 65536 - ``[code]`` = SKARAB_29 : 20 - Stokes - 32768 - ``[code]`` = SKARAB_30 : 20 - No Stokes - 65536 - ``[code]`` = SKARAB_31 : 16 - Stokes - 32768 - ``[code]`` = SKARAB_32 : 16 - No Stokes - 65536 Important note: the *initialize* command takes approximately 7 minutes. #. Choose the integration time in ms (e.g. n=10 corresponds to 100 spectra/sec) ``> integration=[n]`` #. If you want to use the multi-feed derotator to prevent field rotation during long acquisition, select the derotator configuration : ``> derotatorSetConfiguration=[config]`` with ``[config]`` = BSC, CUSTOM or FIXED. - BSC is for Best Coverage Space (automatic rotation of the dewar in order to best cover the scanned area). - CUSTOM : the user has to choose the angle of the dewar axis with the y-axis of the scanning frame that will be kept during the whole duration of the acquisition : ``> derotatorSetPosition=[ang]d`` with ``[ang]`` the dewar angle in degrees. - FIXED : the dewar keeps a fixed postion w.r.t the horizon, no rotation is applied. To specify a static angle : ``> derotatorSetPosition=[ang]d`` with ``[ang]`` the dewar angle in degrees. #. Put the antenna at 45 deg of elevation before checking that the signal is in the linear range of the backend: ``> goTo=*,45d`` |logo| :numref:`srt_mount` #. Check 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 [20;22] and check the value on the interface. ``> getRms`` ``> setAttenuation=[sect],[att]`` with [att] the attenuation from 0 to 15 dB. |logo| :numref:`srt_genericBackend_KKG` Important note 1: You have to set the attenuation accordingly to the values obtained with getRms. It could happen that the rms value of the sections 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15 (feeds 2, 3, 4, 5, 6) does not reach 22. In this case, the attenuation has to be set to 0. Important note 2: The section 10 does not work, do not consider the related getRms and tsys values. #. Check the tsys (typical values up to 100 K) ``> tsys`` |logo| :numref:`srt_genericBackend_KKG` #. Report the ground temperature, relative humidity, atmospheric pressure, and wind speed : ``> wx`` #. Begin the schedule by indicating the start scan [N] or subscan [N_n] in the SCD file : ``> startSchedule=[schedulename].scd,[N]`` |logo| :numref:`srt_scheduler` .. Important note 1: For the sections 0, 1, 2 and 3 (feeds 0 and 1), you have to set the attenuation accordingly to the values obtained with getRms. For the other sections the attenuation has to be set to 0 since the rms does not reach 30. .. To read back the position of the dewar : ``> derotatorGetPosition``