NOTE: These instructions are obsolete! New ones are available here.
Instructions for project 07A-087. See also Ingrid's ASP/GASP instructions. These assume some basic familiarity with GBT pulsar observing.
Start up VNC, astrid, cleo and talk-n-draw in the usual way. Some more detailed instructions on how to do this appear here. Note that the current project ID is 07A-087.
Open up several gasp@gasp0 xterms (for GASP) and several beef xterms (for GUPPI).
Open up the Converter Rack page in CLEO.
Run either the astrid block
A_setup_GASP+Spigot_800, as appropriate for the day's
observing frequency. Note: We will not actually be using Spigot, but
these blocks also route the signals to GUPPI.
IMPORTANT: Do not do any of the following unless you are sure no one is currently observing with GUPPI or GASP. Check the telescope schedule, and if in doubt, just wait until your scheduled time starts.
GUPPI: Follow the instructions here to configure GUPPI and get the input/output levels set correctly. For this project, we use the following settings:
mode('2048')), 800 MHz BW (
reset('800')) and accumulation length 10 (
mode('2048')), 200 MHz BW (
reset('200')) and accumulation length 8 (
GASP: Run "
setif GBT" on gasp0. Check GASP
signal levels by logging into cpci from gasp0 (
ssh cpci -l
root), then running
rms. Input power can be
cpci, or by changing the attenuator values for Converter Modules 11 and
15 in CLEO.
Run the astrid block
New_Schedule_800_guppi, depending on the band in use.
This will automatically run through our list of sources (the schedule
~pdemores/sched/ltt_astrid.cat), taking cal and
pulsar scans with both backends. Assuming everything works, no further
action should be needed until the end of the session.
stat_msg on gasp0 to see GASP status
messages. This can be left running throughout the session. To see the
real-time folded profile display, run
stat_asp on gasp0 as
usual. This should only be run while data is being taken (after the
"Start MJD = ..." message) and will exit automatically when the current
pulsar is finished. Data files are saved in
guppi_status as usual to see the
current GUPPI settings.
guppi_monitor can be run at any
time during observing to see the current bandpass. "
/data1/demorest/guppi.log" will show the output of
guppi_fold as it is running. Data files will be saved in
/data1/demorest/guppi_data/GBT_NANOGrav_(date) and can be
examined/viewed with psrchive commands (vap, pav, etc).
At the end of the session, press "Abort" in astrid to stop the observing script, and log out of astrid as ususal. The backends still need to be stopped as well:
GASP: Just run
stop_asp on gasp0 and also
GUPPI: Run "
pkill -INT guppi_daq" on beef.
HOWEVER, since the datataking processes for the script run as user
pdemores, this will need to be done from a pdemores login (or as root,
if you have sudo access). I'll set up a VNC session and send email on
how to log into it so this can be done. Yes, this is a pretty ugly
hack.. hopefully a better way will be available soon!