COVER INFORMATION Station: VLBA_FD (Code Fd ) 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_FD (Code Fd ) 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 31 42 68.5 114.4 -1.4 -56.5 0 1 1 0 16 30 48 16 35 22 =0851+202 07 36 02 69.3 116.0 -1.3 -55.4 259 F 1 0 16 31 11 16 37 32 J0837+2454 07 38 12 75.6 109.9 -1.0 -63.1 111 1 1 0 16 37 17 16 38 21 =0834+250 07 39 02 75.8 110.2 -1.0 -62.9 50 F 1 0 16 37 40 16 38 31 J0838+2453 07 39 12 75.7 110.1 -1.0 -63.0 5 1 1 0 16 38 21 16 41 21 --- 07 42 02 76.3 111.3 -0.9 -62.1 170 F 1 0 16 38 21 16 41 31 J0837+2454 07 42 12 76.4 111.6 -0.9 -61.9 4 1 1 0 16 41 21 16 42 21 =0834+250 07 43 02 76.6 112.0 -0.9 -61.6 50 F 1 0 16 41 21 16 42 31 J0838+2453 07 43 12 76.5 111.8 -0.9 -61.7 5 1 1 0 16 42 21 16 45 20 --- 07 46 02 77.1 113.2 -0.9 -60.7 170 F 1 0 16 42 21 16 45 30 J0837+2454 07 46 12 77.2 113.5 -0.9 -60.4 4 1 1 0 16 45 20 16 46 20 =0834+250 07 47 02 77.4 113.9 -0.8 -60.1 50 F 1 0 16 45 20 16 46 30 J0838+2453 07 47 12 77.3 113.8 -0.9 -60.2 5 1 1 0 16 46 20 16 49 20 --- 07 50 02 77.8 115.3 -0.8 -59.0 170 F 1 0 16 46 20 16 49 30 J0837+2454 07 50 12 78.0 115.6 -0.8 -58.8 4 1 1 0 16 49 20 16 50 19 =0834+250 07 51 02 78.1 116.1 -0.8 -58.4 50 F 1 0 16 49 20 16 50 29 J0838+2453 07 51 12 78.1 116.0 -0.8 -58.5 5 1 1 0 16 50 19 16 53 19 --- 07 54 02 78.6 117.7 -0.7 -57.2 170 F 1 0 16 50 19 16 53 29 J0837+2454 07 54 12 78.7 118.0 -0.7 -56.9 5 1 1 0 16 53 19 16 54 19 =0834+250 07 55 02 78.9 118.6 -0.7 -56.4 50 F 1 0 16 53 19 16 54 29 J0838+2453 07 55 12 78.8 118.4 -0.7 -56.6 5 1 1 0 16 54 19 16 57 18 --- 07 58 02 79.4 120.3 -0.7 -55.0 170 F 1 0 16 54 19 16 57 28 J0837+2454 07 58 12 79.5 120.7 -0.7 -54.6 4 1 1 0 16 57 18 16 58 18 =0834+250 07 59 02 79.7 121.3 -0.6 -54.1 50 F 1 0 16 57 18 16 58 28 J0838+2453 07 59 12 79.6 121.1 -0.7 -54.3 5 1 1 0 16 58 18 17 01 18 --- 08 02 02 80.1 123.3 -0.6 -52.4 170 F 1 0 16 58 18 Schedule for VLBA_FD (Code Fd ) 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 08 02 12 80.2 123.8 -0.6 -52.0 4 1 1 0 17 01 18 17 02 17 =0834+250 08 03 02 80.4 124.5 -0.6 -51.4 50 F 1 0 17 01 18 17 02 27 J0838+2453 08 03 12 80.3 124.3 -0.6 -51.6 5 1 1 0 17 02 17 17 05 17 --- 08 06 02 80.8 126.8 -0.5 -49.4 170 F 1 0 17 02 17 17 05 27 J0837+2454 08 06 12 80.9 127.3 -0.5 -48.9 4 1 1 0 17 05 17 17 06 17 =0834+250 08 07 02 81.1 128.1 -0.5 -48.2 50 F 1 0 17 05 17 17 06 27 J0838+2453 08 07 12 81.0 127.9 -0.5 -48.5 5 1 1 0 17 06 17 17 09 16 --- 08 10 02 81.5 130.7 -0.5 -46.0 170 F 1 0 17 06 17 17 09 26 J0837+2454 08 10 12 81.6 131.4 -0.5 -45.4 4 1 1 0 17 09 16 17 10 16 =0834+250 08 11 02 81.7 132.3 -0.4 -44.5 50 F 1 0 17 09 16 17 10 26 J0838+2453 08 11 12 81.7 132.0 -0.5 -44.8 5 1 1 0 17 10 16 17 13 16 --- 08 14 02 82.1 135.3 -0.4 -41.8 170 F 1 0 17 10 16 17 13 26 J0837+2454 08 14 12 82.2 136.1 -0.4 -41.1 4 1 1 0 17 13 16 17 14 15 =0834+250 08 15 02 82.3 137.2 -0.4 -40.2 50 F 1 0 17 13 16 17 14 25 J0838+2453 08 15 12 82.3 136.8 -0.4 -40.5 5 1 1 0 17 14 15 17 17 15 --- 08 18 02 82.7 140.6 -0.3 -37.0 170 F 1 0 17 14 15 17 17 25 J0837+2454 08 18 12 82.8 141.5 -0.3 -36.2 4 1 1 0 17 17 15 17 18 15 =0834+250 08 19 02 82.9 142.8 -0.3 -35.0 50 F 1 0 17 17 15 17 18 25 J0838+2453 08 19 12 82.8 142.3 -0.3 -35.5 4 1 1 0 17 18 15 17 21 14 --- 08 22 02 83.2 146.7 -0.3 -31.4 170 F 1 0 17 18 15 17 21 24 J0837+2454 08 22 12 83.3 147.8 -0.3 -30.4 4 1 1 0 17 21 14 17 22 14 =0834+250 08 23 02 83.4 149.2 -0.2 -29.1 50 F 1 0 17 21 14 17 22 24 J0838+2453 08 23 12 83.3 148.6 -0.3 -29.6 4 1 1 0 17 22 14 17 25 14 --- 08 26 02 83.6 153.7 -0.2 -24.9 170 F 1 0 17 22 14 17 25 24 J0837+2454 08 26 12 83.7 154.9 -0.2 -23.7 3 1 1 0 17 25 14 17 26 14 =0834+250 08 27 02 83.8 156.5 -0.2 -22.2 50 F 1 0 17 25 14 17 26 23 J0838+2453 08 27 12 83.7 155.9 -0.2 -22.8 4 1 1 0 17 26 14 17 29 13 --- 08 30 02 83.9 161.5 -0.1 -17.5 170 F 1 0 17 26 14 Schedule for VLBA_FD (Code Fd ) 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 08 30 12 84.0 162.9 -0.1 -16.2 3 1 1 0 17 29 13 17 30 13 =0834+250 08 31 02 84.1 164.6 -0.1 -14.6 50 F 1 0 17 29 13 17 30 23 J0838+2453 08 31 12 84.0 163.9 -0.1 -15.2 4 1 1 0 17 30 13 17 33 12 --- 08 34 02 84.2 170.0 -0.1 -9.5 170 F 1 0 17 30 13 17 33 22 J0837+2454 08 34 12 84.2 171.5 -0.1 -8.1 3 1 1 0 17 33 12 17 34 12 =0834+250 08 35 02 84.2 173.3 0.0 -6.3 50 F 1 0 17 33 12 17 34 22 J0838+2453 08 35 12 84.2 172.6 -0.1 -7.0 4 1 1 0 17 34 12 17 37 12 --- 08 38 02 84.2 179.0 0.0 -1.0 170 F 1 0 17 34 12 17 37 22 J0837+2454 08 38 12 84.3 180.5 0.0 0.5 3 1 1 0 17 37 12 17 38 12 =0834+250 08 39 02 84.3 182.4 0.0 2.3 50 F 1 0 17 37 12 17 38 22 J0838+2453 08 39 12 84.2 181.6 0.0 1.5 4 1 1 0 17 38 12 17 41 11 --- 08 42 02 84.2 188.0 0.1 7.5 170 F 1 0 17 38 12 17 41 21 J0837+2454 08 42 12 84.2 189.5 0.1 9.0 3 1 1 0 17 41 11 17 42 11 =0834+250 08 43 02 84.1 191.3 0.1 10.7 50 F 1 0 17 41 11 17 42 21 J0838+2453 08 43 12 84.2 190.5 0.1 10.0 4 1 1 0 17 42 11 17 45 10 --- 08 46 02 84.0 196.6 0.1 15.7 170 F 1 0 17 42 11 17 45 20 J0837+2454 08 46 12 84.0 198.0 0.1 17.1 3 1 1 0 17 45 10 17 46 10 =0834+250 08 47 02 83.9 199.7 0.2 18.7 50 F 1 0 17 45 10 17 46 20 J0838+2453 08 47 12 83.9 199.0 0.1 18.0 4 1 1 0 17 46 10 17 49 10 --- 08 50 02 83.7 204.6 0.2 23.3 170 F 1 0 17 46 10 17 49 20 J0837+2454 08 50 12 83.7 205.9 0.2 24.5 3 1 1 0 17 49 10 17 50 10 =0834+250 08 51 02 83.6 207.5 0.2 25.9 50 F 1 0 17 49 10 17 50 20 J0838+2453 08 51 12 83.6 206.8 0.2 25.3 4 1 1 0 17 50 10 17 53 09 --- 08 54 02 83.3 211.8 0.3 30.0 170 F 1 0 17 50 10 17 53 19 J0837+2454 08 54 12 83.2 212.9 0.3 31.1 3 1 1 0 17 53 09 17 54 09 =0834+250 08 55 02 83.1 214.3 0.3 32.3 50 F 1 0 17 53 09 17 54 19 J0838+2453 08 55 12 83.2 213.7 0.3 31.7 4 1 1 0 17 54 09 17 57 08 --- 08 58 02 82.8 218.1 0.3 35.8 170 F 1 0 17 54 09 Schedule for VLBA_FD (Code Fd ) 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 58 12 82.7 219.1 0.3 36.7 4 1 1 0 17 57 08 17 58 08 =0834+250 08 59 02 82.6 220.3 0.4 37.8 50 F 1 0 17 57 08 17 58 18 J0838+2453 08 59 12 82.6 219.7 0.3 37.3 4 1 1 0 17 58 08 18 01 08 --- 09 02 02 82.2 223.5 0.4 40.8 170 F 1 0 17 58 08 18 01 18 J0837+2454 09 02 12 82.1 224.4 0.4 41.6 4 1 1 0 18 01 08 18 02 08 =0834+250 09 03 02 82.0 225.5 0.4 42.5 50 F 1 0 18 01 08 18 02 18 J0838+2453 09 03 12 82.1 225.0 0.4 42.1 4 1 1 0 18 02 08 18 05 07 --- 09 06 02 81.6 228.3 0.5 45.1 170 F 1 0 18 02 08 18 05 17 J0837+2454 09 06 12 81.5 229.1 0.5 45.8 4 1 1 0 18 05 07 18 06 07 =0834+250 09 07 02 81.4 229.9 0.5 46.6 50 F 1 0 18 05 07 18 06 17 J0838+2453 09 07 12 81.4 229.5 0.5 46.2 4 1 1 0 18 06 07 18 09 06 --- 09 10 02 81.0 232.4 0.5 48.7 170 F 1 0 18 06 07 18 09 16 J0837+2454 09 10 12 80.9 233.1 0.5 49.3 4 1 1 0 18 09 06 18 10 06 =0834+250 09 11 02 80.7 233.8 0.6 50.0 50 F 1 0 18 09 06 18 10 16 J0838+2453 09 11 12 80.8 233.5 0.5 49.6 5 1 1 0 18 10 06 18 13 06 --- 09 14 02 80.3 235.9 0.6 51.8 170 F 1 0 18 10 06 18 13 16 J0837+2454 09 14 12 80.1 236.5 0.6 52.3 4 1 1 0 18 13 06 18 14 06 =0834+250 09 15 02 80.0 237.2 0.6 52.9 50 F 1 0 18 13 06 18 14 16 J0838+2453 09 15 12 80.1 236.9 0.6 52.6 5 1 1 0 18 14 06 18 17 05 --- 09 18 02 79.5 239.0 0.7 54.4 170 F 1 0 18 14 06 18 17 15 J0837+2454 09 18 12 79.4 239.6 0.7 54.9 4 1 1 0 18 17 05 18 18 05 =0834+250 09 19 02 79.3 240.2 0.7 55.4 50 F 1 0 18 17 05 18 18 15 J0838+2453 09 19 12 79.3 239.9 0.7 55.1 5 1 1 0 18 18 05 18 21 05 --- 09 22 02 78.8 241.8 0.7 56.7 170 F 1 0 18 18 05 18 21 14 J0837+2454 09 22 12 78.7 242.2 0.7 57.1 4 1 1 0 18 21 05 18 22 04 =0834+250 09 23 02 78.5 242.8 0.8 57.5 50 F 1 0 18 21 05 18 22 14 J0838+2453 09 23 12 78.6 242.5 0.7 57.3 5 1 1 0 18 22 04 18 25 04 --- 09 26 02 78.0 244.2 0.8 58.6 170 F 1 0 18 22 04 Schedule for VLBA_FD (Code Fd ) 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 09 26 12 77.9 244.6 0.8 59.0 4 1 1 0 18 25 04 18 26 04 =0834+250 09 27 02 77.7 245.1 0.8 59.3 50 F 1 0 18 25 04 18 26 14 J0838+2453 09 27 12 77.8 244.8 0.8 59.1 5 1 1 0 18 26 04 18 29 03 --- 09 30 02 77.2 246.3 0.9 60.3 170 F 1 0 18 26 04 18 29 13 J0837+2454 09 30 12 77.1 246.7 0.9 60.6 5 1 1 0 18 29 03 18 30 03 =0834+250 09 31 02 76.9 247.1 0.9 60.9 50 F 1 0 18 29 03 18 30 13 J0838+2453 09 31 12 77.0 246.9 0.9 60.8 5 1 1 0 18 30 03 18 33 03 --- 09 34 02 76.4 248.3 0.9 61.8 170 F 1 0 18 30 03 18 33 13 J0837+2454 09 34 12 76.3 248.6 0.9 62.0 5 1 1 0 18 33 03 18 34 02 =0834+250 09 35 02 76.1 249.0 1.0 62.3 50 F 1 0 18 33 03 18 34 12 J0838+2453 09 35 12 76.2 248.8 0.9 62.2 5 1 1 0 18 34 02 18 37 02 --- 09 38 02 75.6 250.0 1.0 63.0 170 F 1 0 18 34 02 18 37 12 J0837+2454 09 38 12 75.5 250.3 1.0 63.3 5 1 1 0 18 37 02 18 38 02 =0834+250 09 39 02 75.3 250.7 1.0 63.5 50 F 1 0 18 37 02 18 38 12 J0838+2453 09 39 12 75.4 250.5 1.0 63.4 5 1 1 0 18 38 02 18 41 01 --- 09 42 02 74.8 251.6 1.1 64.1 170 F 1 0 18 38 02 18 41 11 J0837+2454 09 42 12 74.7 251.9 1.1 64.4 5 1 1 0 18 41 01 18 42 01 =0834+250 09 43 02 74.5 252.2 1.1 64.6 50 F 1 0 18 41 01 18 42 11 J0838+2453 09 43 12 74.6 252.0 1.1 64.4 5 1 1 0 18 42 01 18 45 01 --- 09 46 02 74.0 253.0 1.1 65.1 170 F 1 0 18 42 01 18 45 11 J0837+2454 09 46 12 73.9 253.3 1.1 65.3 5 1 1 0 18 45 01 18 46 00 =0834+250 09 47 02 73.7 253.6 1.2 65.5 50 F 1 0 18 45 01 18 46 10 J0838+2453 09 47 12 73.8 253.4 1.1 65.4 5 1 1 0 18 46 00 18 49 00 --- 09 50 02 73.2 254.4 1.2 66.0 170 F 1 0 18 46 00 18 49 10 J0837+2454 09 50 12 73.0 254.6 1.2 66.1 4 1 1 0 18 49 00 18 50 00 =0834+250 09 51 02 72.9 254.9 1.2 66.3 50 F 1 0 18 49 00 18 50 10 J0838+2453 09 51 12 72.9 254.7 1.2 66.2 5 1 1 0 18 50 00 18 52 59 --- 09 54 02 72.4 255.6 1.3 66.7 170 F 1 0 18 50 00 Schedule for VLBA_FD (Code Fd ) 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 54 12 72.2 255.8 1.3 66.9 4 1 1 0 18 52 59 18 53 59 =0834+250 09 55 02 72.0 256.1 1.3 67.0 50 F 1 0 18 52 59 18 56 09 J0854+2006 09 57 12 72.5 236.6 1.0 49.9 111 1 1 0 18 55 54 19 00 28 =0851+202 10 01 32 71.7 238.7 1.1 51.5 259 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: 4 Station: VLBA_FD 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: 4 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