! Third example sched input file for VLBA observations at 3mm. ! WARNING - this file uses parameters appropriate for the ! MARK5A recording system which is no longer in use on the VLBA. ! However, it will generate files using the RDBE_DDC that will work. ! The total bit rate is only 256 Mbps, which is low compared ! to what the RDBE can do. ! Please see eg3mmb.key or eg3mm_rd2.key for more modern examples ! using the RDBE (DDC and PFB respectively) to get wider ! bandwidth. ! This 3mm example shows the use of automatic insertion of ! peaking scans using the peakinit section. It also shows ! what happens when PKWATCH is set. Otherwise it ! is the same as eg3mmb (although not updated to wide bandwidth). ! Original 2000aug08 Craig Walker and Vivek Dhawan ! Modified 10oct2000 RCW for better reference pointing. ! Modified 21nov2000 RCW. Convert to autopeak. ! Modified 4dec2000 RCW. Convert to imbedded peak commands. ! ========================================================== ! ================= Cover Information ==================== ! ========================================================== version = 1 expt = '3mm observing with autopeak' expcode = eg3mmc 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 = '6cm 128-4-2 ' obstype = VLBA note1 = 'Will use reference pointing.' ! ========================================================== ! ============== Correlator Information ================== ! ========================================================== correl = Socorro coravg = 1.0 corchan = 64 cornant = 4 corpol = on corwtfn = uniform corsrcs = standard cortape = DAT corship1 = 'Craig Walker' corship2 = 'P. O. Box O' corship3 = 'Socorro NM 87801' ! ========================================================== ! ================== Program control ===================== ! ========================================================== ! Normally SCHED will not overwrite preexisting files. ! If you want this protection, comment this following line. overwrit ! ========================================================== ! ======= Standard Source and Station Catalogs ============ ! ========================================================== stafile = $SCHED/catalogs/stations.dat srcfile = $SCHED/catalogs/sources.vlba freqfile = $SCHED/catalogs/freq.dat ! ========================================================== ! ===== Line rest frequencies at 7mm, 3mm and 1.3cm. ===== ! ========================================================== ! The PSiO431 set is specifically for pointing with the 4 channel ! standard pointing file pt7mm.set. Channels 3 and 4 are meant ! to be off source. lineinit / lineset='SiO431' restfreq=43122.027, 43122.027 / lineset='PSiO431' restfreq=43122.027, 43122.027, 43222.027, 43222.027 / lineset='SiO862' restfreq=86243.4, 86243.4 / lineset ='H2O' restfreq=22235.08, 22235.08 / endlines / ! ========================================================== ! =========Automatic Reference Pointing Control ============ ! ========================================================== ! Use reference pointing with setups, stations, and sources ! defined here. See peak.cmd in the catalogs directory for ! more comments on parameters in the peakinit section. autopeak ! Use reference pointing. pkwatch ! Print details of the search for pointing sources. peakfile = none ! Don't read the default $SCHED/catalogs/peak.cmd peakinit / srcfile = $SCHED/catalogs/sources.pointing ! Reference pointing sources minfreq = 60000.0 ! Don't bother for lower frequencies (MHz) dwell = 1:00 ! Duration of peak scan. minel = 10.00 ! Minimum elevation for pointing. setup = $SCHED/setups/pt7mm.set ! Setup to use for peakup linename = 'PSiO431' ! Line to use for peaking sources = '3c273', 'P-AHSco', 'P-OH2.6-0.4', 'P-RPeg', 'P-GYAql', 'P-VXSgr', 'P-RUHER', 'P-V2108OPH' ! Pointing sources to try. stations = vlba_sc, vlba_hn, vlba_nl, vlba_fd, vlba_la, vlba_pt, vlba_kp ! Stations for group 1. / stations = vlba_ov, vlba_br, vlba_mk ! Stations for group 2. / endpeak / ! ========================================================== ! ================== Source Catalog ===================== ! ========================================================== ! Note that pointing sources can be found in ! The following file is used for the fringe finders. srcfile = $SCHED/catalogs/sources.vlba ! This example observes AHSco (SiO maser) in the same mode as ! the continuum observations as a calibration check. For that, ! 8 velocities are needed, one for each channel, to spread the ! frequencies. ! The reference pointing insertion will use the 7mm SiO masers ! P-AHSco and others that are in sources.pointing. srccat / source='SgrA' RA=17:45:40.0399 DEC=-29:00:28.137 equinox='J2000' remarks='Galactic center' / source='AHSco' RA=17:11:16.98 DEC=-32:19:31.2 equinox=j2000 vel=-7, -7, 100, 100, 200, 200, 300, 300 remarks='sest. many spectra on SEST home page.' / endcat / ! ========================================================== ! ======================= Setup file ===================== ! ========================================================== ! Note that it is no longer necessary to have the pointing ! setup be similar to the observing setup as long as the ! pointing setup has FORMAT = NONE. Then the formatter is ! not reconfigured. ! Strong SiO masers will be used for most of the pointing. setini = v3mm-256-8-2.set / nchan = 8 bits = 2 bbfilter = 8.0 freqref = 86244.99 freqoff = -11.50,-11.50,-3.50,-3.50,4.50,4.50,12.50,12.50 netside = U, U, U, U, U, U, U, U pol = dual / endset / ! ========================================================== ! ================= Initial Scan Information ============= ! ========================================================== year = 2000 month = 7 day = 5 start = 02:30:00 STATIONS = VLBA_FD, VLBA_PT, VLBA_LA, VLBA_KP, VLBA_MK ! ========================================================== ! ======================== The Scans ===================== ! ========================================================== pcal=OFF ! No useful PCAL is available at 3 mm. ! Start with two scans on 3C273. ! The first is for pointing. Rather than have SCHED insert ! this scan, the use of POINT to make a scan a pointing scan ! is demonstrated. With no argument, all stations, regardless ! of pointing group, are included. POINT will actually ! cause the pointing to be done at 7mm. The second scan ! records data for fringe finding at 3mm. setup='v3mm-256-8-2.set' source='3C273' dur = 10:00 gap = 4:00 point / source='3C273' dur = 10:00 gap = 0:00 / ! Now do 5 cycles of 2 scans each on SgrA, allowing SCHED ! to insert pointing before every other one scan. rep=5 group=2 source=SgrA dur = 10:00 gap = 4:00 / source=SgrA dur = 10:00 gap = 0:00 / ! Get autocorrelation spectra on a line source. This can help ! with calibration and with troubleshooting. Sufficient gap ! is provided so pointing will be inserted. source='AHSco' ! A nearby strong line source doppler ! Shift frequency for doppler offsets. linena='SiO862' ! Use the 3mm SiO line gap=0:10:00 dur=0:02:00 / nodop ! Turn off the doppler corrections. ! Now do 5 cycles of two scans like those earlier. rep = 5 group = 2 source=SgrA dur=0:10:00 gap=0:4:00 / source=SgrA dur=0:10:00 gap=0:0:00 / ! Insert a fringe finder (strong continuum source). ! Line sources can help get close, but don't give good delays. source='3C345' dur=10:00 gap = 6:00 / ! Now do 5 more cycles of two scans like those earlier. rep = 5 group = 2 source=SgrA dur=0:10:00 gap=0:4:00 / source=SgrA dur=0:10:00 gap=0:0:00 / ! Final fringe finder. source='3C454.3' dur=10:00 gap = 4:00 /