COVER INFORMATION Station: VLBA_KP (Code Kp ) Experiment: BE042d; S/X observation of J0838+2453 Exp. Code: be042d Schedule Version: 1.00 Processed by SCHED version: 6.02 July 2005 PI: Philip Edwards Address: Institute of Space and Astronautical Science 3-1-1 Yoshinodai, Sagamihara Kanagawa 229-8510 Japan Phone: +81-42-759-8342 EMAIL: pge@vsop.isas.ac.jp Fax: +81-42-759-8485 Phone during observation: +81-42-759-8342 Observing mode: 128-4-2 Notes: Fringe finder: J0854+2006 (=OJ287) Ph. ref. cal.: J0837+2454 1 x 2.5 hrs dynamically scheduled centered at LST 8.5 Schedule for VLBA_KP (Code Kp ) Page 2 BE042d; S/X observation of J0838+2453 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- Next scan frequencies: 2262.49 2270.49 8412.49 8420.49 Next BBC frequencies: 837.51 829.51 812.49 820.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 16 31 03 J0854+2006 07 01 02 61.9 108.0 -1.9 -59.3 0 1 1 0 16 30 48 16 35 22 =0851+202 07 05 22 62.7 109.1 -1.8 -58.6 259 F 1 0 16 31 11 16 37 32 J0837+2454 07 07 32 68.9 103.9 -1.5 -65.2 111 1 1 0 16 37 17 16 38 21 =0834+250 07 08 22 69.1 104.1 -1.5 -65.1 50 F 1 0 16 37 40 16 38 31 J0838+2453 07 08 32 69.0 104.0 -1.5 -65.1 5 1 1 0 16 38 21 16 41 21 --- 07 11 22 69.6 104.8 -1.5 -64.7 170 F 1 0 16 38 21 16 41 31 J0837+2454 07 11 32 69.8 105.0 -1.4 -64.6 4 1 1 0 16 41 21 16 42 21 =0834+250 07 12 22 69.9 105.2 -1.4 -64.5 50 F 1 0 16 41 21 16 42 31 J0838+2453 07 12 32 69.9 105.1 -1.4 -64.5 5 1 1 0 16 42 21 16 45 20 --- 07 15 22 70.4 105.9 -1.4 -64.1 170 F 1 0 16 42 21 16 45 30 J0837+2454 07 15 32 70.6 106.1 -1.4 -64.0 4 1 1 0 16 45 20 16 46 20 =0834+250 07 16 22 70.8 106.4 -1.4 -63.8 50 F 1 0 16 45 20 16 46 30 J0838+2453 07 16 32 70.7 106.3 -1.4 -63.9 5 1 1 0 16 46 20 16 49 20 --- 07 19 22 71.3 107.2 -1.3 -63.3 170 F 1 0 16 46 20 16 49 30 J0837+2454 07 19 32 71.4 107.4 -1.3 -63.2 4 1 1 0 16 49 20 16 50 19 =0834+250 07 20 22 71.6 107.6 -1.3 -63.1 50 F 1 0 16 49 20 16 50 29 J0838+2453 07 20 32 71.5 107.5 -1.3 -63.1 5 1 1 0 16 50 19 16 53 19 --- 07 23 22 72.1 108.5 -1.3 -62.5 170 F 1 0 16 50 19 16 53 29 J0837+2454 07 23 32 72.2 108.7 -1.2 -62.4 4 1 1 0 16 53 19 16 54 19 =0834+250 07 24 22 72.4 109.0 -1.2 -62.2 50 F 1 0 16 53 19 16 54 29 J0838+2453 07 24 32 72.3 108.9 -1.2 -62.2 5 1 1 0 16 54 19 16 57 18 --- 07 27 22 72.9 109.9 -1.2 -61.6 170 F 1 0 16 54 19 16 57 28 J0837+2454 07 27 32 73.0 110.1 -1.2 -61.4 4 1 1 0 16 57 18 16 58 18 =0834+250 07 28 22 73.2 110.4 -1.2 -61.2 50 F 1 0 16 57 18 16 58 28 J0838+2453 07 28 32 73.1 110.3 -1.2 -61.3 5 1 1 0 16 58 18 17 01 18 --- 07 31 22 73.7 111.4 -1.1 -60.5 170 F 1 0 16 58 18 Schedule for VLBA_KP (Code Kp ) Page 3 BE042d; S/X observation of J0838+2453 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 17 01 28 J0837+2454 07 31 32 73.8 111.7 -1.1 -60.4 4 1 1 0 17 01 18 17 02 17 =0834+250 07 32 22 74.0 112.0 -1.1 -60.1 50 F 1 0 17 01 18 17 02 27 J0838+2453 07 32 32 73.9 111.9 -1.1 -60.2 5 1 1 0 17 02 17 17 05 17 --- 07 35 22 74.4 113.1 -1.1 -59.4 170 F 1 0 17 02 17 17 05 27 J0837+2454 07 35 32 74.6 113.3 -1.0 -59.2 4 1 1 0 17 05 17 17 06 17 =0834+250 07 36 22 74.7 113.7 -1.0 -58.9 50 F 1 0 17 05 17 17 06 27 J0838+2453 07 36 32 74.7 113.6 -1.0 -59.0 5 1 1 0 17 06 17 17 09 16 --- 07 39 22 75.2 114.9 -1.0 -58.0 170 F 1 0 17 06 17 17 09 26 J0837+2454 07 39 32 75.4 115.2 -1.0 -57.8 4 1 1 0 17 09 16 17 10 16 =0834+250 07 40 22 75.5 115.6 -1.0 -57.5 50 F 1 0 17 09 16 17 10 26 J0838+2453 07 40 32 75.4 115.4 -1.0 -57.6 5 1 1 0 17 10 16 17 13 16 --- 07 43 22 76.0 116.8 -0.9 -56.6 170 F 1 0 17 10 16 17 13 26 J0837+2454 07 43 32 76.1 117.2 -0.9 -56.3 5 1 1 0 17 13 16 17 14 15 =0834+250 07 44 22 76.3 117.6 -0.9 -56.0 50 F 1 0 17 13 16 17 14 25 J0838+2453 07 44 32 76.2 117.5 -0.9 -56.1 5 1 1 0 17 14 15 17 17 15 --- 07 47 22 76.7 119.0 -0.9 -54.9 170 F 1 0 17 14 15 17 17 25 J0837+2454 07 47 32 76.9 119.4 -0.8 -54.6 5 1 1 0 17 17 15 17 18 15 =0834+250 07 48 22 77.0 119.8 -0.8 -54.2 50 F 1 0 17 17 15 17 18 25 J0838+2453 07 48 32 76.9 119.7 -0.8 -54.3 5 1 1 0 17 18 15 17 21 14 --- 07 51 22 77.5 121.4 -0.8 -53.0 170 F 1 0 17 18 15 17 21 24 J0837+2454 07 51 32 77.6 121.8 -0.8 -52.7 5 1 1 0 17 21 14 17 22 14 =0834+250 07 52 22 77.7 122.3 -0.8 -52.2 50 F 1 0 17 21 14 17 22 24 J0838+2453 07 52 32 77.7 122.1 -0.8 -52.4 5 1 1 0 17 22 14 17 25 14 --- 07 55 22 78.2 124.1 -0.7 -50.8 170 F 1 0 17 22 14 17 25 24 J0837+2454 07 55 32 78.3 124.5 -0.7 -50.4 4 1 1 0 17 25 14 17 26 14 =0834+250 07 56 22 78.4 125.1 -0.7 -49.9 50 F 1 0 17 25 14 17 26 23 J0838+2453 07 56 32 78.4 124.9 -0.7 -50.1 5 1 1 0 17 26 14 17 29 13 --- 07 59 22 78.9 127.0 -0.7 -48.3 170 F 1 0 17 26 14 Schedule for VLBA_KP (Code Kp ) Page 4 BE042d; S/X observation of J0838+2453 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 17 29 23 J0837+2454 07 59 32 79.0 127.5 -0.6 -47.9 4 1 1 0 17 29 13 17 30 13 =0834+250 08 00 22 79.1 128.2 -0.6 -47.3 50 F 1 0 17 29 13 17 30 23 J0838+2453 08 00 32 79.1 127.9 -0.6 -47.5 5 1 1 0 17 30 13 17 33 12 --- 08 03 22 79.5 130.3 -0.6 -45.5 170 F 1 0 17 30 13 17 33 22 J0837+2454 08 03 32 79.6 130.9 -0.6 -45.0 4 1 1 0 17 33 12 17 34 12 =0834+250 08 04 22 79.8 131.6 -0.6 -44.4 50 F 1 0 17 33 12 17 34 22 J0838+2453 08 04 32 79.7 131.4 -0.6 -44.6 5 1 1 0 17 34 12 17 37 12 --- 08 07 22 80.2 134.0 -0.5 -42.2 170 F 1 0 17 34 12 17 37 22 J0837+2454 08 07 32 80.3 134.7 -0.5 -41.7 4 1 1 0 17 37 12 17 38 12 =0834+250 08 08 22 80.4 135.5 -0.5 -41.0 50 F 1 0 17 37 12 17 38 22 J0838+2453 08 08 32 80.3 135.2 -0.5 -41.2 5 1 1 0 17 38 12 17 41 11 --- 08 11 22 80.7 138.2 -0.5 -38.6 170 F 1 0 17 38 12 17 41 21 J0837+2454 08 11 32 80.9 138.9 -0.4 -37.9 4 1 1 0 17 41 11 17 42 11 =0834+250 08 12 22 81.0 139.9 -0.4 -37.1 50 F 1 0 17 41 11 17 42 21 J0838+2453 08 12 32 80.9 139.5 -0.4 -37.4 5 1 1 0 17 42 11 17 45 10 --- 08 15 22 81.3 142.9 -0.4 -34.4 170 F 1 0 17 42 11 17 45 20 J0837+2454 08 15 32 81.4 143.7 -0.4 -33.6 4 1 1 0 17 45 10 17 46 10 =0834+250 08 16 22 81.5 144.7 -0.4 -32.7 50 F 1 0 17 45 10 17 46 20 J0838+2453 08 16 32 81.4 144.3 -0.4 -33.0 5 1 1 0 17 46 10 17 49 10 --- 08 19 22 81.8 148.1 -0.3 -29.6 170 F 1 0 17 46 10 17 49 20 J0837+2454 08 19 32 81.9 149.0 -0.3 -28.8 4 1 1 0 17 49 10 17 50 10 =0834+250 08 20 22 81.9 150.2 -0.3 -27.7 50 F 1 0 17 49 10 17 50 20 J0838+2453 08 20 32 81.9 149.7 -0.3 -28.1 4 1 1 0 17 50 10 17 53 09 --- 08 23 22 82.2 153.9 -0.3 -24.3 170 F 1 0 17 50 10 17 53 19 J0837+2454 08 23 32 82.3 154.9 -0.2 -23.4 4 1 1 0 17 53 09 17 54 09 =0834+250 08 24 22 82.3 156.2 -0.2 -22.2 50 F 1 0 17 53 09 17 54 19 J0838+2453 08 24 32 82.3 155.7 -0.2 -22.6 4 1 1 0 17 54 09 17 57 08 --- 08 27 22 82.5 160.2 -0.2 -18.4 170 F 1 0 17 54 09 Schedule for VLBA_KP (Code Kp ) Page 5 BE042d; S/X observation of J0838+2453 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 17 57 18 J0837+2454 08 27 32 82.6 161.3 -0.2 -17.4 4 1 1 0 17 57 08 17 58 08 =0834+250 08 28 22 82.6 162.7 -0.2 -16.1 50 F 1 0 17 57 08 17 58 18 J0838+2453 08 28 32 82.6 162.2 -0.2 -16.6 4 1 1 0 17 58 08 18 01 08 --- 08 31 22 82.8 167.1 -0.1 -12.1 170 F 1 0 17 58 08 18 01 18 J0837+2454 08 31 32 82.8 168.3 -0.1 -11.0 3 1 1 0 18 01 08 18 02 08 =0834+250 08 32 22 82.8 169.7 -0.1 -9.6 50 F 1 0 18 01 08 18 02 18 J0838+2453 08 32 32 82.8 169.1 -0.1 -10.2 4 1 1 0 18 02 08 18 05 07 --- 08 35 22 82.9 174.3 -0.1 -5.4 170 F 1 0 18 02 08 18 05 17 J0837+2454 08 35 32 82.9 175.5 0.0 -4.2 3 1 1 0 18 05 07 18 06 07 =0834+250 08 36 22 82.9 177.0 0.0 -2.8 50 F 1 0 18 05 07 18 06 17 J0838+2453 08 36 32 82.9 176.4 0.0 -3.4 4 1 1 0 18 06 07 18 09 06 --- 08 39 22 82.9 181.6 0.0 1.5 170 F 1 0 18 06 07 18 09 16 J0837+2454 08 39 32 82.9 182.8 0.0 2.7 3 1 1 0 18 09 06 18 10 06 =0834+250 08 40 22 82.9 184.4 0.0 4.1 50 F 1 0 18 09 06 18 10 16 J0838+2453 08 40 32 82.9 183.7 0.0 3.5 4 1 1 0 18 10 06 18 13 06 --- 08 43 22 82.8 188.9 0.1 8.3 170 F 1 0 18 10 06 18 13 16 J0837+2454 08 43 32 82.8 190.1 0.1 9.5 3 1 1 0 18 13 06 18 14 06 =0834+250 08 44 22 82.8 191.6 0.1 10.9 50 F 1 0 18 13 06 18 14 16 J0838+2453 08 44 32 82.8 191.0 0.1 10.3 4 1 1 0 18 14 06 18 17 05 --- 08 47 22 82.7 195.9 0.1 14.9 170 F 1 0 18 14 06 18 17 15 J0837+2454 08 47 32 82.6 197.1 0.2 16.0 3 1 1 0 18 17 05 18 18 05 =0834+250 08 48 22 82.6 198.5 0.2 17.3 50 F 1 0 18 17 05 18 18 15 J0838+2453 08 48 32 82.6 197.9 0.2 16.7 4 1 1 0 18 18 05 18 21 05 --- 08 51 22 82.4 202.6 0.2 21.0 170 F 1 0 18 18 05 18 21 14 J0837+2454 08 51 32 82.3 203.7 0.2 22.1 4 1 1 0 18 21 05 18 22 04 =0834+250 08 52 22 82.3 205.0 0.2 23.3 50 F 1 0 18 21 05 18 22 14 J0838+2453 08 52 32 82.3 204.4 0.2 22.7 4 1 1 0 18 22 04 18 25 04 --- 08 55 22 82.0 208.7 0.3 26.7 170 F 1 0 18 22 04 Schedule for VLBA_KP (Code Kp ) Page 6 BE042d; S/X observation of J0838+2453 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 18 25 14 J0837+2454 08 55 32 82.0 209.7 0.3 27.6 4 1 1 0 18 25 04 18 26 04 =0834+250 08 56 22 81.9 210.9 0.3 28.7 50 F 1 0 18 25 04 18 26 14 J0838+2453 08 56 32 81.9 210.4 0.3 28.2 4 1 1 0 18 26 04 18 29 03 --- 08 59 22 81.6 214.2 0.3 31.7 170 F 1 0 18 26 04 18 29 13 J0837+2454 08 59 32 81.5 215.2 0.4 32.6 4 1 1 0 18 29 03 18 30 03 =0834+250 09 00 22 81.4 216.2 0.4 33.6 50 F 1 0 18 29 03 18 30 13 J0838+2453 09 00 32 81.4 215.7 0.4 33.1 4 1 1 0 18 30 03 18 33 03 --- 09 03 22 81.1 219.2 0.4 36.2 170 F 1 0 18 30 03 18 33 13 J0837+2454 09 03 32 81.0 220.0 0.4 37.0 4 1 1 0 18 33 03 18 34 02 =0834+250 09 04 22 80.9 221.0 0.4 37.9 50 F 1 0 18 33 03 18 34 12 J0838+2453 09 04 32 80.9 220.6 0.4 37.5 4 1 1 0 18 34 02 18 37 02 --- 09 07 22 80.5 223.7 0.5 40.2 170 F 1 0 18 34 02 18 37 12 J0837+2454 09 07 32 80.4 224.4 0.5 40.9 4 1 1 0 18 37 02 18 38 02 =0834+250 09 08 22 80.3 225.3 0.5 41.6 50 F 1 0 18 37 02 18 38 12 J0838+2453 09 08 32 80.3 224.9 0.5 41.3 5 1 1 0 18 38 02 18 41 01 --- 09 11 22 79.9 227.6 0.5 43.7 170 F 1 0 18 38 02 18 41 11 J0837+2454 09 11 32 79.8 228.3 0.6 44.3 4 1 1 0 18 41 01 18 42 01 =0834+250 09 12 22 79.7 229.1 0.6 44.9 50 F 1 0 18 41 01 18 42 11 J0838+2453 09 12 32 79.7 228.7 0.6 44.6 5 1 1 0 18 42 01 18 45 01 --- 09 15 22 79.2 231.2 0.6 46.8 170 F 1 0 18 42 01 18 45 11 J0837+2454 09 15 32 79.1 231.8 0.6 47.3 4 1 1 0 18 45 01 18 46 00 =0834+250 09 16 22 79.0 232.4 0.6 47.8 50 F 1 0 18 45 01 18 46 10 J0838+2453 09 16 32 79.1 232.1 0.6 47.6 5 1 1 0 18 46 00 18 49 00 --- 09 19 22 78.6 234.3 0.7 49.4 170 F 1 0 18 46 00 18 49 10 J0837+2454 09 19 32 78.5 234.8 0.7 49.9 4 1 1 0 18 49 00 18 50 00 =0834+250 09 20 22 78.3 235.5 0.7 50.4 50 F 1 0 18 49 00 18 50 10 J0838+2453 09 20 32 78.4 235.2 0.7 50.1 5 1 1 0 18 50 00 18 52 59 --- 09 23 22 77.9 237.1 0.7 51.8 170 F 1 0 18 50 00 Schedule for VLBA_KP (Code Kp ) Page 7 BE042d; S/X observation of J0838+2453 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 18 53 09 J0837+2454 09 23 32 77.8 237.6 0.8 52.2 4 1 1 0 18 52 59 18 53 59 =0834+250 09 24 22 77.6 238.2 0.8 52.6 50 F 1 0 18 52 59 18 56 09 J0854+2006 09 26 32 76.2 212.6 0.5 29.1 107 1 1 0 18 55 54 19 00 28 =0851+202 09 30 52 75.7 216.2 0.6 32.2 259 F 1 0 18 56 17 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/filehost/cwalker/sched/setups/vsx-128-4-2-R.set Matches group vsx_22 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 7 Station: VLBA_KP Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Speedup factor: 2.00 Disk used to record data. 1st LO= 3100.00 3100.00 7600.00 7600.00 Net SB= U U U U Pol. = RCP RCP RCP RCP BBC = 1 2 3 4 BBC SB= L L U U IF = A A B B VLBA FE= 13cm 4cm 13cm 4cm VLBA Synth= 7.6 3.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 7 Setup file default. Used pcal sets: 1 LO sum= 2262.49 2270.49 8412.49 8420.49 BBC fr= 837.51 829.51 812.49 820.49 Bandwd= 8.000 8.000 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S1 S3 S1 S2 S3 S4 PCALXB2= S2 S4 S2 S4 M1 M2 M3 M4 PCALFR1= 510 510 6510 6510 0 0 0 0 PCALFR2= 510 510 6510 6510 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_off SOURCE LIST -- BE042d; S/X observation of J0838+2453 Catalog positions marked with *. Precession of date coordinates is based on stop time of first scan. Names used in schedule marked with *. Short names used in VLA and SNAP files marked with +. Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900 No adjustments are made for rates (DRA, DDEC). Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * J0838+2453 08 35 13.074679 * 08 38 10.950000 08 38 29.568600 0.00 25 04 15.80443 * 24 53 42.86000 24 52 42.70410 0.00 From catalog imbedded in main SCHED input file. 1.601 scan hours, 72.053 baseline hours above horizon. * J0837+2454 08 34 42.314443 * 08 37 40.245685 08 37 58.870939 0.23 0834+250 25 04 54.32847 * 24 54 23.12160 24 53 23.15207 0.41 J0837+24 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.485 scan hours, 21.815 baseline hours above horizon. * J0854+2006 08 51 57.250617 * 08 54 48.874929 08 55 06.795238 0.21 0851+202 20 17 58.41740 * 20 06 30.64085 20 05 25.09792 0.40 J0854+20 /home/filehost/cwalker/sched/catalogs/sources.vlba OJ287 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.144 scan hours, 6.482 baseline hours above horizon. 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) J0838+2453 23.0 J0837+2454 23.1 J0854+2006 17.4 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