|
Size: 5345
Comment:
|
Size: 6522
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 112: | Line 112: |
| == List of Commands == These commands are specific of the Pool observations with the bolometer. || Command || Explanation || || '''@wbolo''' || Setup the default configuration and the commands. || || '''bf''' || Perform a focus. || || '''bmap''' ''Az'' ''El'' ''Elstep'' ''Azvel'' || Perform an OTF map with an extent ''Az''x''El'' (arcsec), an elevation step ''Elstep'' (arcsec) and a scan velocity ''Azvel'' (arcsec/s) || || '''bsw''' ''throw'' || Setup the wobbler ''throw'' (arcsec). || || '''bt''' || Perform a bolotip at the current azimuth. || || '''btaz''' ''az'' || Perform a bolotip at the azimuth ''az''. || || '''gain'''''val'' || Setup the bolometer gain at ''val'': use ''gain 10'' for all but ''2'' for Mars, Mercury (Venus, Saturn, Jupiter). || || '''onf4''' || Quick 1 minute onoff on a strong source (calibrator). || || '''onf''' ''Nsub'' ''Throw'' || Perform an onoff of ''Nsub'' subscans of 1 minute with a wobbler ''Throw'' (arcsec) || || '''p40''' || Perform a pointing (40 arcsec) on a week source <!> NCS problem still. || || '''p60''' || Perform a pointing (60 arcsec) on a strong source <!> To be preferred currently || |
Bolometer's Observation
The most important commands of the old system have been adapted to the NCS. Here is a typical starting sequence for the bolometer.
Setup the Bolometer
Pako> @wbolo ! Mambo2, central pixel 53, short onoff (onf4), setup the bolometer commands
Sources Catalog
Pako> catalog source pool ! Setup the project source catalog BR Pako> catalog source ihet ! Setup the pointing/calibration source catalog
Pointing sources: J1419+240 not 1419+240. BR Pako is cASe-SenSiTIve for the source names.
Skydip, pointing, skydip
Pako> bt !Skydip at the current azimuth+start
Every 2 hours in stable atmospheric condition.
Pako> p40 !Short pointing for weak sources+start BR Pako> p60 !Long pointing for strong sources+start BR Pako> set pointing azcor elcor !Correct the pointing with azcor and elcor. Correction from MOPSIC (@p or @psn for weak source)
Pako> bf BR Pako> start ! Start the focus BR Pako> set focus sfcz !Correct the focus with sfcz. Correction from MOPSIC (@f or @fsn for weak sources) BR Do a focus when atmospheric conditions are changing, typically after sunset/sunrise
Before an Onoff, be sure you are pointing with the right pixel (20). Do a pointing before each Onoff or map if they are longer than 30 mn.
Calibration
Calibration on a [primary|secondary] calibrator
Pako> catalog source ihet BR Pako> source Calibrator_Name BR Pako> p60 BR Pako> set pointing azcor elcor BR Pako> onf4 ! Short Onoff integration (4 Subscans of 10 s) with central pixel 53
You may do a short onf4 after a normal pointing to monitor the pointing source flux.
Onoff and Map
Pako>onf 20 30 !Perform an on-off integration of 20 subscans of 60s with a wobbler throw of 30" BR Pako> @onf30 !Some project may have their own on-off macro
Don't try to make very long integration, you may loose the complete scan. In such a case use a loop.
Pako> bsw throw !Setup the wobbler throw BR Pako> bmap laz lel elstep azv !Setup an OTF map of laz azimuth length, lel elevation length, elstep elevation step and azv azimuth speed (arcsec/s). BR Pako> start !Start the map after you checked it is correct (it gives you the total integration time).
The speed should not be larger than ~8 arcsec/sec
NOTE: BR roff20 : set the pixel 20 for on-off (most sensitive one). BR roff53 : set the central pixel 53 (default with @wbolo) BR BR
Typical Bolo Session
A typical starting session could be as following:
Pako> @wbolo
Pako> source Mars
Pako> gain 2 ! special case for Mars, normal gain is 10
Pako> p60
Pako> bt !skydip
Pako> p60
Pako> set pointing 2. -6.
Pako> focus 1.1
Pako> start
Pako> set focus -3.5
Pako> onf4 ! Measure the flux of Mars
Pako> gain 10.
Pako> @wbolo
Pako> set project 175_05
Pako> catalog source ihet
Pako> source J0854+201 ! Pointing source
Pako> roff20
Pako> p40
Pako> set pointing 0.4 -6.4
Pako> onf4 ! Why not ?
Pako> catalog source pool
Pako> source 0927+2001 !Project source
Pako> onf 20 35 ! Do an on-off integration of 20 subscans of 60s
! with a wobbler throw of 35¨.
Pako> Ad Nauseam ... 
The set project Proj_Id will be necessary until it is automatically included in the source catalog.
List of Commands
These commands are specific of the Pool observations with the bolometer.
Command |
Explanation |
@wbolo |
Setup the default configuration and the commands. |
bf |
Perform a focus. |
bmap Az El Elstep Azvel |
Perform an OTF map with an extent AzxEl (arcsec), an elevation step Elstep (arcsec) and a scan velocity Azvel (arcsec/s) |
bsw throw |
Setup the wobbler throw (arcsec). |
bt |
Perform a bolotip at the current azimuth. |
btaz az |
Perform a bolotip at the azimuth az. |
gainval |
Setup the bolometer gain at val: use gain 10 for all but 2 for Mars, Mercury (Venus, Saturn, Jupiter). |
onf4 |
Quick 1 minute onoff on a strong source (calibrator). |
onf Nsub Throw |
Perform an onoff of Nsub subscans of 1 minute with a wobbler Throw (arcsec) |
p40 |
Perform a pointing (40 arcsec) on a week source |
p60 |
Perform a pointing (60 arcsec) on a strong source |
Heterodyne Observation
Heterodyne observations are more complex in the sense there is much more options available. Since the NCS/Pako are still under heavy development, we give here a typical session. Some commands are the same that with bolometer observations. If the macros written by the PIs are not working ask the Pool coordinator or the AoD.
Pako> @setup-186_05-1850 ! Setup the frequencies/receivers. Tuning... Pako> source Mars Pako> pointing ! Check if continuum backends are set Pako> start Pako> set pointing -1. 2. ! The correction are given using the mira program Pako> focus 2.0 Pako> start Pako> set focus -2.2 ! The correction is given using the mira program Pako> cata source ihet Pako> source J2240+245 ! Pointing source Pako> pointing Pako> start Pako> set point -1. 0.5 Pako> catalog source pool Pako> source N821 Pako> @backends-186_05 ! maybe included in the following macro Pako> @target-wsw-186_05 Number of Loops= 5 ! according the indications of the PI. Pako> @setup-186_05-1850 ! Setup the continuum backend. Pako> source J2240+245 Pako> pointing Pako> start Pako> set point -1. 0.5 Pako> catalog source pool Pako> source N822 Pako> @backends-186_05 Pako> @target-wsw-186_05 Number of Loops= 5 Pako> Ad Nauseam ...