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AGES Observing Guide
- Start CIMA from the right-mouse-button menu on the ‘Observer’
machine. You will get the ‘CIMA version selection’ window shown
below. Choose CIMA version 3.0 (the "next generation" version)
– the normal (default) version will not work correction for ALFA
drift-scan observing. If you are running remotely, type cima --X at
the command-prompt on ‘Observer’.
![CIMA version selection window](CIMA-1.png)
- The next window to appear is the ‘observing session set-up’
window shown below. You should enter the project number ‘a2048’,
put your initials in the ‘Observer’ box and select
‘line’ observing by clicking that button. Once the window is
set-up click the ‘Accept’ button to proceed.
![CIMA observing session Set-up window](CIMA-2.png)
-
A number of windows will open: the ‘CIMA Observation Log
Display’, the ‘CIMA main menu’, the ‘CIMA observation
status’, the ‘CIMA observation log display’ and the
‘Receiver selection menu’ screens. You should firstly go to the
‘Reciever selection menu’ screen (shown below) and select
‘ALFA’. Then click the &lsquoAcceptw’ button at the bottom
left to continue. This window will now vanish.
-
Next go to the ‘CIMA main menu’ window, seen on the left of the
screenshot above.Before starting observing, it is a good idea to restart the
WAPPs (the spectrometers used by AGES). This is done from the
‘CIMA utilities’ window which you bring up by pressing the
‘Utilities’ button on the main menu. On the
‘Utilities’ window that then appears (shown on the screenshot
below), click the ‘Restart WAPPs’ button to restart the
WAPPs.
![CIMA utilities screenshot](CIMA-4.png)
- Once the WAPPs have been restarted, dismiss the utilities
window by clicking the ‘Close’ button at the bottom left.
From the main menu, select ‘Command File Observing’ to bring up
the ‘Command file observing window’ (below).
![CIMA Command File Observing window](CIMA-5.png)
- To load a command file, click the ‘Load’ button at the bottom
to bring up the ‘Command file selection menu’. This
should be automatically placed in the /share/obs4/usr/a2048
directory. Files are arranged alphabetically, with only the files with
.cmd extensions shown by default. You may need to scroll down
to see all the files.
![Command file selection menu](CIMA-6.png)
- If there is time, or if TOGS has time assigned at the start, you should
run the TOGS setup as described below:
- First choose the command_galfasrc.cmd file in the command file
selection menu and
click ‘Accept’ at the bottom left (the button is greyed-out until
a file is selected). This will load the file into the ‘Command File
Observing’ window, as shown below. Hit the ‘Run’ button
at the bottom of the
command file observing window to run the file. This will
drive the telescope to a position near the start of the field and run the
TOGS calibration.
![CIMA Command File
Observing window with 'command_galfasrc.script' loaded](CIMA-7.png)
- When the command file reaches the actual observing command
(’SMARTFREQ‘), it will pop up the observing window for smart
frequency switching. This is necessary for CIMA's
parameter checking - if there are any errors they will show in this window.
If you are observing remotely over VNC, you will need to place this window
before CIMA times out (about 1 minute). If it does time then it should give
a warning and continue running without checking the options.
![Smart frequency switching observing window](CIMA-7A.png)
- To carry out the AGES observing, you need to run the (pre-prepared)
observing script. This has a name in the format YYMMDD.cmd (with
YYMMDD being replaced by the current day's date at Arecibo at the start
of the observations). You should select this from the command file selection
menu as described above.
![CIMA Command file observing window with
'080216.cmd' loaded](CIMA-8.png)
- You run this script by hitting the ‘Run’ button at the bottom
of the command file observing window. When it reaches the actual observing
command (’FIXEDDRIFT‘), it will pop up the observing window for
the fixed azimuth drift map. This is necessary for CIMA's
parameter checking - if there are any errors they will show in this window.
If you are observing remotely over VNC, you will need to place this window
before CIMA times out (about 1 minute). If it does time then it should give
a warning and continue running without checking the options. Note that if
you previously ran the TOGS setup and left the smart frequency switching
window open, CIMA will use this window and will not open another one.
- The telescope should now drive to the source and start observing. It
should run smoothly and should not require any more interference until the
end of the AGES time, but it is a good idea to monitor the data on
the ‘Dataview’ machine. This machine should already be logged in
and running TOGS, you can choose another window using the window manager on the
top of the screen, or just use the other screen. Click on the
‘Dataview’ button on the window-manager at the top of the screen
to bring up a menu. Select ‘Quick Look Data Display’ to open up
the data display window. If running remotely, type alfadatawin at
the command prompt on ‘Dataview’. If you open this program from
the menu, you will get the same ‘CIMA version selector’ window you
got on opening CIMA, select ‘normal’ again, if you open it from
the command line then ‘normal’ is automatically selected.
On the ‘ALFA on-line data display’ window, you will want to select
‘ALFA Pattern’ to see all the beams displayed in a layout similar
to the ALFA array. From the ‘Diagrams’ button next to ‘Plot
Type:’ you can select ‘Spectrum’ to see the instantaneous
spectrum, ‘Saterfall’ to see a waterfall plot of recent spectra
(the most normal display) or ‘Total Power’ to see the total power
plot (this is normally dominated by the 12-second pulses of the FAA radar).
You can use this display to monitor data quality, in particular whether
any unusual source of RFI is present.
![ALFA on-line
data display window](/~rminchin/cimashots/alfadatadisplay.png)
- You should also open a web browser (Mozilla is available on the
‘Dataview’ drop-down menu, or if observing remotely you can use
whatever you local browser is) and fill in the AGES log form available at
http://www.naic.edu/~ages/a2048/logform.html. You should note any RFI
seen on the data display and any problems encountered during the run.
- At the end of the run, if there is time, or if TOGS has allocated
time, restart the WAPPS again (as above) and run the
command_galfacurpos.cmd command file to calibrate TOGS at the
current telescope position. As long as you do not close the fixed azimuth
drift map window opened earlier, this window will be re=used by CIMA and no
new window will be popped up.
![CIMA Command File
Observing window with 'command_galfacurpos.script' loaded](CIMA-9.png)
- Submit the AGES log, and move the files following the guidelines
that will appear on the browser by copying a pasting the commands from
the browser into a terminal screen logged into the AGES account.
- Go to bed!!
Prepared by R. Minchin
Last updated:
Wednesday, 02-Jul-2008 14:41:14 AST, by R. Minchin