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LBA
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J Ds NH 3 Setup NotesPage 1 (edit)
Setup for NH3 Observing at Mt. Pleasant: login observer on mills, smerd, operator on hobart 0. Set top Rhode and Schwarz oscillator to 821.3 MHz, 9.0 dBm 1. Select K band receiver numb 8 on laptop (use stoatn for startup) 1a. calu -m sam26m on smerd (main control sun workstation) 2. x,y,z = 55,141,5 platform receiver position 3. third Rhode and Schwarz (smx) 658 MHz level 10 dbm for (1,1) 630 (2,2) IF attens 23 dB, 20 dB switched attens 15 dB, 0 dB 4. set agilent: on Hobart do : rs.tcl, double click agi1, enter: rf 18.0 ghz
lev 16. dbm exit
5. setup das: new program cor32000.pro, load, setup… new setup das: new program cor16000.pro, load, setup…
do s for setup after loading new program!!
reboot correlator, then do setup again…
6. Do scan on Jupiter, Venus, Orion … (see Bruce commands below) To get planet position, use miriad task planets
enter epoch, planet name, go
eg. epoch=06jun17:09:30 (UT date and time hh:mm)
7. setup Hobart: clear all running programs, get a couple of empty terminal windows.
cor
(this command opens two text windows, two GUI’s for correlator)
on each GUI, find config file (e.g. das_xxyy_32_2048), select it
enter BW 32.0 MHz in small BW text window on GUI
go, stop, go, stop
meanwhile, enter c/r for /xs pgplot device on spc window
when correlator is running, enter
sel 1,2
to see both bands
(be sure to stop correlator before starting control program)
8. If necessary, make command file for correlator on hobart, using .list file as in this directory
cd corsched
./corsched.pl
(enter list file name, output file name (same.out), park at end)
edit the .out file to add lines with
opacity (for skytip)
fc
fo auto.rpf (for closing and reopening file)
put these before line with “source” command
at end put “park”
The skydip output goes in a bruce file in /scratch/bruce on smerd or mills
It takes a long time to list all files in this directory.
Names are structured as : bruce_06168.log (2006 day 168)
b0616809.597 (continuum data)
Bruce log has entries with time stamp like: 2453903.889074
(JD and fraction of a day, UT=0h is .0 day number)
analyze the skydips using ~sellings/progs/perl/opacity.pl —input=filename
or …… ……. …….. ….. —help
9. start observing with command on Hobart (empty window) /usr/local/pkg/correlator/survey_ng -a sys26m -c hobart -i 0 -n 2 -r rakbus -s sam26m -f jd-gal21.out (note the output file from corsched.pl is the last thing on this one line command) There are some little executable files with this command for easy starting in directory corsched on Hobart, named jd-gal21, jd-gal5, etc. There are lots of .list and .out files also in corsched, with names like amm-gal21.out, amm-gal21.list, etc. note also .sch files (setup files with frequency, bandwidth, etc) like amm11.sch etc in corsched directory on Hobart. 10. The rpfits file goes to /obs/data on smerd Bruce commands for test continuum scans on planets: ./KILL_BRUCE.pl (from observer on mills, to kill any bruce job still running) in /u/observer/ abort all vdesk jobs on smerd: first open a window and expand it to be full width, most of height of screen cd /obs/develop/sol/mapping ./bruce -f 4 c/r c/r (defaults for rakbus, sys26m, etc.) source jupiter left 13:03:06.72 (whatever ra) right −5:42:39.9 (whatever dec) coordinate mode j2000 drvon (wait a while until the drives are on) slew numberchannels 2 tsys (record result…) length 0.5 rate 0.5 sample spacing 0.005 frequency 1 23694. frequency 2 23694. direction left scan ….. direction right scan ….. when done: quit (must exit before starting correlator control program) Bruce commands for test continuum scans on planets: ./KILL_BRUCE.pl (from observer on mills, to kill any bruce job still running) in /u/observer/ abort all vdesk jobs on smerd: first open a window and expand it to be full width, most of height of screen cd /obs/develop/sol/mapping ./bruce -f 4 c/r c/r (defaults for rakbus, sys26m, etc.) source jupiter left 13:03:06.72 (whatever ra) right −5:42:39.9 (whatever dec) coordinate mode j2000 drvon (wait a while until the drives are on) slew numberchannels 2 tsys (record result…) length 0.5 rate 0.5 sample spacing 0.005 frequency 1 23694. frequency 2 23694. direction left scan ….. direction right scan ….. when done: quit (must exit before starting correlator control program) wiring : Rack 3, panel 1 E and W to panel 5 amplifiers, to panel 4 attenuators to rack 6 panel 4 RF SMX R+S synthesizer rack 4 panel 3 (658 MHz, 7.0 dBm) to rack 5 panel 5 “IN”, splits two outs to both “LO” rack 6 panel 4 note: use non-inverting 1056 MHz setting on rack 6 panel 4 Rack 6 panel 4 IF to lower 96 MHz filter bnc, rack 6 panel 2. Upper bnc to 3A, 3B inputs, rack 6 panel 1 rack 3 panel 10 6A, 6B to rack 2 panel 2 inputs (left), outputs (right) to rack 3 panel 8 RF in’s rack3 panel 8 DC out’s to panel 9 1A, 1B. rack 1 bottom blue panel left two into panel just above - tangle of connectors to rack 2 panel 7 (digital interface) for remote communication with the cor (correlator control) program on hobart: Login to hobart and run the program dscom in an xterm. (it can’t run at the same time as survey_ng) To stop the correlator cycling : stop To start the correlator cycling : go To close a file : fc To reconfigure the correlator : config . When finished with dscom quit The stop, fc and config commands return a response and you should wait for them before quitting. |