! BE001 example of 3C84 observations at 6 and 4 cm. ! ! This example shows many things in gory detail and has ! many comments. The example manual_2.key is the exact ! same schedule, but takes advantage of SCHED defaults ! and is missing most comments. It looks much less ! intimidating and is closer to what users will actually ! make. ! ! ========================================================== ! ================= Cover Information ==================== ! ========================================================== version = 1 expt = 'Example: 3C84 6, and 4 cm' expcode = BE001 obstype = VLBA piname = 'Craig Walker' address1 = 'National Radio Astronomy Observatory' address2 = 'P. O. Box O' address3 = 'Socorro, New Mexico, 87801' address4 = ' U.S.A. ' phone = '505 835 7247 ' obsphone = '505 835 7247 ' email = 'cwalker@nrao.edu' fax = '505 835 7027 ' obsmode = 'Continuum' correl = 'Socorro' note1 = ' ' ! ========================================================== ! ============== Correlator Information ================== ! ========================================================== correl = 'Socorro' coravg = 4 corchan = 16 cornant = 10 corpol = 'on' corwtfn = 'uniform' corsrcs = 'VLBA Data Base' cortape = DAT corship1 = 'Craig Walker' corship2 = 'P. O. Box O' corship3 = 'Socorro NM 87801' cornote1 = ' ' ! ! ========================================================== ! ================== Program control ===================== ! ========================================================== ! Allow SCHED to overwrite existing files: overwrit ! To process only VLBA and VLA stations, uncomment: ! dosta 'vl' ! Use automatic tape allocation on VLBA control system ! antennas with 2 or more tape drives autotape=2 ! ! The tape initialization section has been removed from this example. ! ! ========================================================== ! ==================== Station Catalog ==================== ! ========================================================== ! For this example, to show the format, get 2 stations from the ! internal station catalog. Get the rest from the standard catalog. ! Note that any stations here must have their positions here and ! not depend on the locations file. Normally accurate positions ! would be in XYZ, but for a new station, or for configuration ! searches, Elev/Long/Lat might be more convenient. stacat / STATION=VLBA_PT STCODE=Pt CONTROL=VLBA ELEV=2371.00 LONG=108:07:07.24 LAT=34:18:03.61 MOUNT=ALTAZ AX1LIM=-90,450 AX2LIM=2.25,90 AX1RATE=90 AX2RATE=30 AX1ACC=0.75 AX2ACC=0.25 TSETTLE=4 DAR=VLBA NBBC=8 ! RECORDER=VLBA NDRIVES=2 NHEADS=1 DISK=MARK5A MEDIADEF=DISK ! PT From 150 K Ts line by Beasley and Medcalf Aug 1992. HOR_AZ = 0, 5, 60, 65, 70, 75, 80, 85,165,170,180,185,190,195, 200,240,245,250,255,265,270,275,280,285,360 HOR_EL = 2, 2, 2, 3, 3, 2, 3, 2, 2, 3, 3, 4, 4, 3, 4, 4, 3, 4, 3, 3, 4, 3, 3, 2, 2 / STATION=VLA1 STCODE=Y CONTROL=VLA MOUNT=ALTAZ AX1LIM=-85,445 AX2LIM=8,90 AX1RATE=40 AX2RATE=20 AX1ACC=2.2 AX2ACC=2.2 ! Broilo Dec. 5, 2005 TSETTLE=15 DAR=VLBA NBBC=8 ! RECORDER=VLBA NDRIVES=2 NHEADS=1 DISK=MARK5A MEDIADEF=DISK ELEV= 2100.00 LONG= 107:37:04.79 LAT= 34:04:44.40 HOR_AZ = 0,360 HOR_EL = 8,8 ! Horizon not blocked to El limit. / endcat / ! Get most stations from the catalog. stafile = $SCHED/catalogs/stations.dat ! ========================================================== ! ==================== Source Catalog ===================== ! ========================================================== ! Get the sources from the imbedded catalog. srccat / equinox='J2000' source='J2253+1608','3C454.3' calcode = 'V' ra=22:53:57.74790 dec=16:08:53.5630 / source='0309+411' calcode = 'N' ra=03:13:01.96212 dec=41:20:01.1841 / source='0316+413','3C84' calcode = 'V' ra=03:19:48.16010 dec=41:30:42.1060 / source='0552+398','DA193' calcode = 'N' ra=05:55:30.80561 dec=39:48:49.1656 / source='J1229+0203','3C273' calcode = 'V' ra=12:29:06.69970 dec=02:03:08.5980 / endcat / srcfile = none ! ========================================================== ! ==================== Setup Information =================== ! ========================================================== ! Now specify the setup information. These are nearly copies of ! two older standard setups. Both set up 4 channel recordings in ! vlba mode with 1:4 fan out and 64 Mbits per second. The channel ! bandwidths are 8 MHz and the sampling is with 1 bit per sample. ! The first is for frequencies in the 6 cm band. The second is 4 cm. ! The second setup defaults more parameters than the first and ! shows all that a user is really required to provide if the desired ! frequency is included in the frequency catalog. ! Note, here is where VLA1 and VLA27 are different - they have ! different rchan and lchan. To avoid errors, do not use a ! generic "VLA" setinit = v6cm.set / nchan = 4 samprate = 16.0 bits = 1 bbfilter = 8.0 ! 64 Mbps tpmode = 2 format = VLBA1:4 netside = U, U, U, U bbc = 1, 2, 3, 4 ifchan = R, L, R, L freqref = 4990.99 freqoff = -3.5, -3.5, 4.5, 4.5 fe(1) = '6cm' fe(3) = '6cm' synth(2) = 4.1 firstlo = 4100.00 station = VLBA rchan = A lchan = C / firstlo = 4360.10 vlaband = VC vlabw = '0000' station = VLA1 rchan = B lchan = D / endset / setinit = v4cm.set / band = '4cm' nchan = 4 bits = 1 bbfilter = 8.0 pol = dual / endset / ! ========================================================== ! ================= Initial Scan Information ============= ! ========================================================== ! Scheduled project time is 1995 Oct 22 from 01:30 to 16 UT. ! Set the start time. The day is for the scan stop time. year = 1995 month = 10 day = 22 start = 01:30:00 ! ========================================================== ! ======================== The Scans ===================== ! ========================================================== ! Note that this is a moderately complex schedule, but ! serves to show a number of points about scheduling style. ! The scans will be blocked in groups with 11 minutes of record ! time which is 1/4 of a pass on a thin tape at high density. ! This is good proceedure when not using automatic tape allocation. ! With auto allocation, it can be better to just ignore the ! pass length. ! This schedule will trigger a warning about excessive sync time. ! That is because no PRESTART or equivalent is used and the ! recordings are stopped often - each time taking 40 seconds ! to resync. A PRESTART=40 reduces that lost time drastically, ! but also reduces the number of readback tests. But there are ! enough long slews that there are still enough readback tests. ! So it would be better to put in a PRESTART, but that will ! change with Mark5, plus this makes a test of SCHEDs sync ! calculations so the example will be left as is. If you use ! it as a template, you should probably put in a PRESTART. ! Start with a fringe finder on all antennas at both frequencies. ! The dwell time on the second scan tells SCHED to insert enough ! of a gap between the scans for the antennas to get to the source. ! The VLA will be in single dish mode 'VS' for the whole project. stations = VLBA_SC, VLBA_HN, VLBA_NL, VLBA_FD, VLBA_LA, VLBA_PT, VLBA_KP, VLBA_OV, VLBA_BR, VLBA_MK, VLA1 vlamode = vs Source = 3C454.3 Dur = 5:30 Setup = v6cm.set / Source = 3C454.3 Dwell = 5:30 Setup = v4cm.set / ! Now observe the target source, 3C84, along with a short scan on a ! nearby source for use as a position reference at 4 cm. ! Each 13+ minute group includes 13 minutes recording, 2 minute gap, ! and a few tens of seconds for slews. ! The 2 minute gap at the start allows time for readback tests. ! Leave out VLBA_MK for 3 hours because the source is not up. stations = VLBA_SC, VLBA_HN, VLBA_NL, VLBA_FD, VLBA_LA, VLBA_PT, VLBA_KP, VLBA_OV, VLBA_BR, VLA1 group 4 rep 14 ! About 3 hours in 14 repeats of the next 4 scans. Source = 3C84 Dur = 3:00 gap = 2:00 Setup = v6cm.set / Source = 3C84 Dwell = 3:00 gap = 0 Setup = v4cm.set / Source = 0309+411 Dwell = 2:00 / Source = 3C84 Dwell = 3:00 / ! Add in VLBA_MK (It would have been ok to leave it in.) stations = VLBA_SC, VLBA_HN, VLBA_NL, VLBA_FD, VLBA_LA, VLBA_PT, VLBA_KP, VLBA_OV, VLBA_BR, VLBA_MK, VLA1 group 4 rep 14 ! About 3 hours. Source = 3C84 Dur = 3:00 gap = 2:00 Setup = v6cm.set / Source = 3C84 Dwell = 3:00 gap = 0 Setup = v4cm.set / Source = 0309+411 Dwell = 2:00 / Source = 3C84 Dwell = 3:00 / ! Now a good calibrator is available. Get some scans on it along ! with the 3C84 stuff. Combine two 15 minute blocks into a loop. group 8 rep 15 ! About 6.5 hours Source = 3C84 Dur = 3:00 gap = 2:00 Setup = v6cm.set / Source = 0552+398 Dwell = 3:00 gap = 0 / Source = 0552+398 Dwell = 2:00 gap = 0 Setup = v4cm.set / Source = 3C84 Dwell = 3:00 gap = 0 / Source = 3C84 Dur = 3:00 gap = 2:00 Setup = v6cm.set / Source = 3C84 Dwell = 3:00 gap = 0 Setup = v4cm.set / Source = 0309+411 Dwell = 2:00 / Source = 3C84 Dwell = 3:00 / ! Finish with another strong fringe finder. Source = 3C273 Dur = 5:30 gap = 3:00 Setup = v6cm.set / Source = 3C273 Dwell = 5:30 gap = 0:00 Setup = v4cm.set / ! ========================================================== ! ======================== End of example ================ ! ==========================================================