COVER INFORMATION Station: GBT_VLBA (Code Gb ) Experiment: test of NRAO RDBE/DDC + EVN for Gb/s (L-band) Exp. Code: F13L3 Schedule Version: 1.00 Processed by SCHED version: 11.00 Release of Feb. 15, 2013 PI: Bob Campbell Address: JIVE Oude Hoogeveensedijk 4 7991PD Dwingeloo Phone: +31 521 596-534 EMAIL: campbell@jive.nl Fax: Phone during observation: +31 521 596-534 Observing mode: Notes: Schedule for GBT_VLBA (Code Gb ) Page 2 test of NRAO RDBE/DDC + EVN for Gb/s (L-band) UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Fri 7 Jun 2013 Day 158 --- Next scan frequencies: 1594.25 1594.25 1658.25 1658.25 Next BBC frequencies: 805.75 805.75 741.75 741.75 Next scan bandwidths: 64.00 64.00 64.00 64.00 09 00 00 J2005+7752 20 44 20 50.3 -3.2 0.7 167.9 0 0 09 00 00 09 12 00 =2007+777 20 56 22 50.2 -4.2 0.9 164.3 720 92 09 00 01 09 12 26 J2005+7752 20 56 48 50.1 -4.2 0.9 164.1 6 92 09 12 26 09 14 06 =2007+777 20 58 28 50.1 -4.3 0.9 163.6 100 105 09 12 27 09 14 26 J2005+7752 20 58 48 50.1 -4.3 0.9 163.5 0 105 09 14 26 09 19 06 =2007+777 21 03 29 50.0 -4.7 1.0 162.1 280 141 09 14 27 09 19 26 J2005+7752 21 03 49 50.0 -4.7 1.0 162.0 0 141 09 19 26 09 24 06 =2007+777 21 08 30 50.0 -5.1 1.1 160.6 280 177 09 19 27 09 24 26 J2005+7752 21 08 50 50.0 -5.1 1.1 160.5 0 177 09 24 26 09 29 06 =2007+777 21 13 31 49.9 -5.5 1.1 159.1 280 213 09 24 27 09 29 26 J2005+7752 21 13 51 49.9 -5.5 1.1 159.0 0 213 09 29 26 09 34 06 =2007+777 21 18 32 49.8 -5.9 1.2 157.5 280 249 09 29 27 Next scan frequencies: 1626.25 1626.25 1658.25 1658.25 Next BBC frequencies: 773.75 773.75 741.75 741.75 Next scan bandwidths: 32.00 32.00 32.00 32.00 09 37 06 J2005+7752 21 21 32 49.7 -6.1 1.3 156.6 159 249 09 37 06 09 38 46 =2007+777 21 23 12 49.7 -6.2 1.3 156.1 100 255 09 37 31 09 39 06 J2005+7752 21 23 32 49.7 -6.2 1.3 156.0 0 255 09 39 06 09 43 46 =2007+777 21 28 13 49.6 -6.6 1.4 154.6 280 273 09 39 07 09 44 06 J2005+7752 21 28 33 49.6 -6.6 1.4 154.5 0 273 09 44 06 09 48 46 =2007+777 21 33 14 49.4 -6.9 1.5 153.1 280 291 09 44 07 09 49 06 J2005+7752 21 33 34 49.4 -7.0 1.5 153.0 0 291 09 49 06 09 53 46 =2007+777 21 38 15 49.3 -7.3 1.6 151.6 280 309 09 49 07 09 54 06 J2005+7752 21 38 35 49.3 -7.3 1.6 151.5 0 309 09 54 06 09 58 46 =2007+777 21 43 16 49.2 -7.6 1.6 150.1 280 327 09 54 07 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: LG.evn.rdbeddc Matching groups in ./freq.sess213rdbe.dat: g20cm_2 LO1=4.632, LO2=12.732, LO3=10.5 Setup group: 11 Station: GBT_VLBA Total bit rate: 1024 Format: MARK5B Bits per sample: 2 Sample rate:128.000 Number of channels: 4 DBE type: RDBE_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 2400.00 2400.00 2400.00 2400.00 Net SB= U U U U IF SB = L L L L Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= L L L L IF = A C A C The following frequency sets based on these setups were used. Frequency Set: 13 Setup file default. LO sum= 1594.25 1594.25 1658.25 1658.25 BBC fr= 805.75 805.75 741.75 741.75 Bandwd= 64.00 64.00 64.00 64.00 Matching frequency sets: 13 Track assignments are: track1= 2, 4, 6, 8 barrel=roll_off ======== Setup file: L5.evn.rdbeddc Matching groups in ./freq.sess213rdbe.dat: g20cm_2 LO1=4.632, LO2=12.732, LO3=10.5 Setup group: 34 Station: GBT_VLBA Total bit rate: 512 Format: MARK5B Bits per sample: 2 Sample rate: 64.000 Number of channels: 4 DBE type: RDBE_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 2400.00 2400.00 2400.00 2400.00 Net SB= U U U U IF SB = L L L L Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= L L L L IF = A C A C The following frequency sets based on these setups were used. Frequency Set: 36 Setup file default. LO sum= 1626.25 1626.25 1658.25 1658.25 BBC fr= 773.75 773.75 741.75 741.75 Bandwd= 32.00 32.00 32.00 32.00 Matching frequency sets: 36 Track assignments are: track1= 2, 4, 6, 8 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * J2005+7752 20 07 20.430170 * 20 05 30.998498 20 05 06.028304 0.48 2007+777 77 43 58.12300 * 77 52 43.24753 77 54 57.60291 0.10 J2005+77 /aps3/sched11.0/catalogs/sources.vlba rfc_2012b Petrov, 2012, unpublished 16337 observations SOURCE SCAN SUMMARY FOR SOURCES LISTED ABOVE Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Setup file Frequency sets Observing hours (duplicates not shown) Scan Baseline J2005+7752 LG.evn.rdbeddc 1 3 13 14 15 16 17 18 19 20 + 0.539 131.929 L5.evn.rdbeddc 25 26 36 37 38 39 40 41 42 + 0.339 85.730 EFFECT OF SOLAR CORONA The solar corona can cause unstable phases for sources too close to the Sun. SCHED provides warnings at individual scans for distances less than 10 degrees. The distance from the Sun to each source in this schedule is: Source Sun distance (deg) J2005+7752 75.9 Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes that the Sun will cause amplitude reductions on the longest VLBA baselines at a solar distance of 60deg F^(-0.6) where F is in GHz. For common VLBI bands, this is: 327 MHz 117. deg 610 MHz 81. deg 1.6 GHz 45. deg 2.3 GHz 36. deg 5.0 GHz 23. deg 8.4 GHz 17. deg 15.0 GHz 12. deg 22.0 GHz 9. deg 43.0 GHz 6. deg