Appendix B - Complete command list
- COMMAND TEMPORISATION All commands can be temporised (i.e.
associated to a starting time) adding a proper suffix. There are two possibilities:
absolute temporisation (the operation will be performed at the indicated time):
@DOY-HH:MM:SS, where DOY is the Day-Of-Year (1-366) and HH:MM:SS is the UT time;
iterative temporisation (the operation is performed now, then periodically according to the indicated time interval):
@!DAYS-HH:MM:SS, where DAYS is the number of days and HH:MM:SS is hours, minutes, seconds.
Commands (temporised or not) can be used also in the init/pre-scan/post-scan procedures inside schedules. Observers are in charge of considering if and when the use of a certain command makes sense in their schedule, according to their specific needs and goals: this is something that no schedule parser can check!
Here follow all the commands exploitable in ESCS:
- > antennaPark
sends the antenna to stow position
- > antennaReset
resets the alarm conditions
- > antennaSetup=[code]
KKG, …) unstows the antenna, sets it to tracking mode and configures the pointing model according to the specified receiver. It does NOT perform the receiver and backend setup
- > antennaStop
stops the antenna. Activities can start again only commanding a mode change as
antennaTrack(which does not affect the overall setup) or a new setup
- > antennaTrack
sets the antenna to PROGRAMTRACK mode. It does not change the pointing model or any receiver setup
- > azelOffsets=[double]d,[double]d
sets the Az-El offsets (degrees). They are intended “on sky”, i.e. it is the actual offset run on the sky at the source Elevation.
- > calOn
switches the calibration mark on
- > calOff
switches the calibration mark off
- > chooseBackend=[string]
selects the backend; string can be
- > chooseRecorder=[string]
selects the backend; string can be
- > crossScan=[scanFrame],[span],[duration]
performs a cross-scan on the previously selected target (indicated using the
siderealcommands), along the scanFrame (
GAL), spanning span degrees in duration seconds
- > device=[sect]
computes the beamsize, taking into account the present receiver and backend configurations relative to section sect
- > dmed=[config]
This command configures an additional set of programmable attenuators (DIMED device). The available configurations consist in pre-defined sets of values: ‘sun’ is meant for solar observations, ‘default’ must be used for all the other acquisitions. When commanding an overall setup, such as
setupKKC, the configuration is set back to ‘default’.
- > flush=[N]
deletes the N-th element in the queue of temporised commands
- > flushAll
deletes all the queue of the temporised commands
- > fTrack=[dev]
It collects all the required data from the antenna, the back-end and the front-end, plus the information provided by the user (see the
restFrequencycommands), then it tunes the telescope devices in order to centre the line(s) in each section bandwidth. The command lets the user select which device [dev] is asked to perform the tuning:
LO: only the front-end local oscillator is moved
ALL: the back-end performa a sub-tuning in the various sections
- > getAttenuations
reads the attenuation values (dB) currently configured for the active sections, and lists them according to increasing section number
- > getTpi
reads the signal intensity (raw counts) for the active sections, and lists them according to increasing section number
- > goOff=[frame],[beams]
slews the antenna to an offset position, wrt a previously commanded target, along the longitude axis of the indicated coordinate frame (
GAL). The user provides the offset value expressed in beamsizes. If the frame is HOR and target lies beyond the Elevation cutoff limits, the offset is applied in Elevation.
- > goTo=[double]d,[double]d
sends the antenna, while in TRACKING mode, to the specified Az-El position.
Arguments are always rounded in the range 0-360 and 0-90 for azimuth and elevation respectively (in any case the ranges are limited to mechanical contraints). The jolly character is valid and is considered as: keep the present value. The differences from the
once the antenna reaches the destination, the system will acknowledge the “on source” status;
the pointing corrections (pointing model and refraction) are applied. In case they are not required they must be turned off explicitly.
- > haltSchedule
completes the current scan and then stops the schedule
- > initialize=[code]
KKC, …) configures the backend using the default parameters relative to the selected receiver. It does not act on the receiver, pointing model or antenna mount mode.
- > integration=[double]
sets the backend integration time (ms)
- > log=[filename]
defines a custom name for the logfile (do not specify the extension)
- > lonlatOffsets=[double]d,[double]d
sets the Galactic b-l offsets (degrees). They are intended “on sky”, i.e. it is the actual offset run on the sky at the source latitude.
- > moon
points the antenna to the present coordinates of the center of the Moon
- > preset=[double]d,[double]d
sends the antenna, if in PRESET mode, to the specified Az-El position, without applying any pointing correction. This is useful when needing to point to a position next to the zenith. Beware: the antenna will reach the destination but no “on source” flag will be raised.
- > project=[code]
lets the system know which project is observing (the code/name must correspond to the one provided by the TAC). This code/name is then considered as default when launching schedules: the system will search for them in a folder named “project/schedules”. This code/name also forms part of the output FITS filename. Notice that the PROJECT keyword indicated inside the schedule, which is then written in the “Project Name” keyword in the FITS main header, is a free string and might differ from the project official name.
- > radecOffsets=[double]d,[double]d
sets the RA-Dec offsets (degrees). They are intended “on sky”, i.e. it is the actual offset run on the sky at the source Declination.
- > radialVelocity=[vrad],[vref],[vdef]
[vrad] (radial velocity) is in km/sec if vdef is not Z
[vref] (reference frame) can be one of the following:
BARY: Solar System BARYCENTRE
LSRK: Kinematic Local Standard of Rest
LSRD: Dynamical Local Standard of Rest
LGRP: Local Group
GALCEN: Galactic Centre
TOPOCEN: TOPOCENTRIC (observer’s frame)
[vdef] (velocity definition) can either be:
RD: Radio Definition
OP: Optical Definition
Z: stands for Redshift
The specified velocity parameters are valid until a new target is commanded. The
radialVelocitycommand overrides any other velocity value that might have been differently expressed
- > receiversMode=[code]
configures the working mode of the receiver, according to its peculiar characteristics
- > receiversSetup=[code]
XXP, …) configures the receiver using the default parameters. It does not act on the backend, pointing model or antenna mount mode
- > restFrequency=[freq1];...;[freqN]
[freq] is given in MHz and is a multiple argument: it can list a different value for each of the N sections - as long as XARCOS is the backend in use(not all the backends allow this sub-tuning). Specifying a single value assigns the rest frequency to all the sections. The specified values will hold until different ones are commanded, or until a new general setup command is entered.
- > setAttenuation=[sect],[att]
sets to att (dB) the attenuator of section sect
- > setLO=[freq]
Local Oscillator frequency, in MHz (one per IF, separated by “;”, usually the values are identical) This LO frequency corresponds to: SkyFreq(@band start) – 100 MHz when using the TPB
- > setSection=[sect],[startFreq],[bw],[feed],[mode],[sampleRate],[bins]
configures the backend section sect.
- > setupCCC (setupCCCL, setupXXP, etc…)
unstows the antenna, sets it to tracking mode, selects the pointing model, and configures the receiver and the backend using default parameters. In practice, it is a shortcut corresponding to this sequence:
> antennaSetup=[code] > receiversSetup=[receiverCode] > initialize=[receiverCode] > device=0 > calOff
- > sidereal=[sourcename],[RA],[Dec],[epoch],[sector]
points to the supplied RA-Dec position and temporarily assigns the sourcename label to it. Epoch can be
-1, the last one meaning that the provided coordinates are precessed to the observing epoch. The sector keyword forces the cable wrap sector, if needed: its value can be
NEUTRAL. The last option means the system will automatically choose the optimal alternative.
- > skydip=[El1]d,[El2]d,[duration]
performs an OTF acquisition at the current azimuth position, spanning in elevation from El1 to El2 (both expressed in degrees, with ‘d’ suffix), in duration time expressed as hh:mm:ss. A recorder must have previously been enabled in order to save the data, and the antenna must have received a pointing command as
- > startSchedule=[project/][schedulename].scd,[N]
runs schedule schedulename.scd (project is the ID of the observing project, it is optional if it has already been input through the
projectcommand), reading it from line N
- > stopSchedule
immediately stops the running schedule, truncating the acquisition
- > ti
lists all the active temporised commands
- > track=[sourcename]
points the antenna, in sidereal tracking, to the specified source, which must be present in the local catalogue
- > tsys
measures the system temperature (K) in the position the antenna is pointing to. It returns a list of values, one for each section in use. Intermediate steps and calculations are stored in the active logfile
- > wait=[double]
sets a delay (in seconds) which is applied before the system reads/executes the next command
- > winkingMark=[integer]
activates the winking (i.e. fast switching) calibration mark, whose period in milliseconds is given as an integer parameter. To switch the mark off, simply command a zero-ms period. This must always be done when the winking mark is not needed anymore.
> winkingMark=40activates the mark so that is alternately stays ON for 40 ms and OFF for 40 ms.
> winkingMark=0switches the mark off
- > wx
returns the current weather parameters: ground temperature (°C), relative humidity (%), atmospheric pressure (hPa), wind speed (km/h).