COVER INFORMATION Station: TIANMA65 (Code T6 ) Experiment: LSR J1835 follow-up observations Exp. Code: ec086b Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Juan B. Climent Address: Dpto. Astronomia, Univ. Valencia Dr. Moliner 50 E-46100 Burjassot Valencia, Spain Phone: +34 963543078 EMAIL: cliojuan@uv.es Fax: Phone during observation: +34 963543078, +34629509130 Observing mode: Phase-referencing at 6cm (4 Gbps) Notes: Schedule for TIANMA65 (Code T6 ) Page 2 LSR J1835 follow-up observations 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 ---------------------------------------------------------------------------------------- --- Sun 12 Jun 2022 Day 163 --- Next scan frequencies: 4632.00 4632.00 4632.00 4632.00 4696.00 4696.00 4696.00 4696.00 4760.00 4760.00 4760.00 4760.00 4824.00 4824.00 4824.00 4824.00 4888.00 4888.00 4888.00 4888.00 4952.00 4952.00 4952.00 4952.00 5016.00 5016.00 5016.00 5016.00 5080.00 5080.00 5080.00 5080.00 Next BBC frequencies: 544.00 544.00 544.00 544.00 608.00 608.00 608.00 608.00 672.00 672.00 672.00 672.00 736.00 736.00 736.00 736.00 800.00 800.00 800.00 800.00 864.00 864.00 864.00 864.00 928.00 928.00 928.00 928.00 992.00 992.00 992.00 992.00 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 21 00 00 1830+285 22 29 13 39.5 -76.9 3.9 71.7 0 0 21 00 00 21 04 00 --- 22 33 13 38.6 -76.5 4.0 71.5 240 124 21 00 01 21 04 50 J1848+3219 22 34 04 42.7 -72.9 3.7 75.7 31 124 21 04 50 21 06 50 =1846+322 22 36 04 42.3 -72.8 3.8 75.5 120 185 21 04 51 21 06 50 LSRJ1835+325 22 36 04 39.9 -71.0 4.0 75.0 -12 185 No stop 21 10 50 --- 22 40 05 39.1 -70.7 4.1 74.6 228 309 21 06 51 21 11 30 J1848+3219 22 40 45 41.4 -72.5 3.9 75.1 28 309 21 11 30 21 12 50 =1846+322 22 42 05 41.1 -72.4 3.9 75.0 80 350 21 11 31 21 12 50 LSRJ1835+325 22 42 05 38.7 -70.6 4.1 74.4 -12 350 No stop 21 16 50 --- 22 46 06 37.9 -70.3 4.2 74.1 228 474 21 12 51 21 17 30 J1848+3219 22 46 46 40.1 -72.0 4.0 74.6 29 474 21 17 30 21 18 50 =1846+322 22 48 06 39.9 -71.9 4.0 74.5 80 515 21 17 31 21 18 50 LSRJ1835+325 22 48 06 37.5 -70.2 4.2 73.9 -12 515 No stop 21 22 50 --- 22 52 07 36.7 -69.9 4.3 73.5 228 639 21 18 51 21 23 30 J1848+3219 22 52 47 38.9 -71.6 4.1 74.1 29 639 21 23 30 21 24 50 =1846+322 22 54 07 38.6 -71.5 4.1 74.0 80 680 21 23 31 21 24 50 LSRJ1835+325 22 54 07 36.3 -69.7 4.3 73.3 -12 680 No stop 21 28 50 --- 22 58 08 35.5 -69.4 4.4 72.9 228 804 21 24 51 21 29 30 J1848+3219 22 58 48 37.7 -71.1 4.2 73.6 29 804 21 29 30 21 30 50 =1846+322 23 00 08 37.4 -71.0 4.2 73.4 80 845 21 29 31 21 30 50 LSRJ1835+325 23 00 08 35.1 -69.3 4.4 72.8 -12 845 No stop 21 34 50 --- 23 04 09 34.3 -69.0 4.5 72.4 228 969 21 30 51 Schedule for TIANMA65 (Code T6 ) Page 3 LSR J1835 follow-up observations 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 ---------------------------------------------------------------------------------------- --- Sun 12 Jun 2022 Day 163 --- 21 35 30 J1848+3219 23 04 49 36.5 -70.7 4.3 73.0 29 969 21 35 30 21 36 50 =1846+322 23 06 09 36.2 -70.6 4.3 72.9 80 1010 21 35 31 21 36 50 J1834+3205 23 06 09 33.4 -69.8 4.5 71.6 -13 1010 No stop 21 38 50 --- 23 08 09 33.0 -69.6 4.5 71.4 107 1072 21 36 51 21 38 50 J1848+3219 23 08 09 35.8 -70.4 4.3 72.7 -13 1072 No stop 21 40 50 =1846+322 23 10 10 35.4 -70.3 4.3 72.6 107 1134 21 38 51 21 40 50 LSRJ1835+325 23 10 10 33.1 -68.5 4.6 71.8 -12 1134 No stop 21 44 50 --- 23 14 10 32.3 -68.2 4.6 71.4 228 1257 21 40 51 21 45 30 J1848+3219 23 14 50 34.5 -69.9 4.4 72.1 29 1257 21 45 30 21 46 50 =1846+322 23 16 11 34.2 -69.8 4.4 72.0 80 1298 21 45 31 21 46 50 LSRJ1835+325 23 16 11 31.9 -68.0 4.7 71.3 -11 1298 No stop 21 50 50 --- 23 20 11 31.1 -67.7 4.7 70.9 229 1422 21 46 51 21 51 30 J1848+3219 23 20 51 33.3 -69.4 4.5 71.6 29 1422 21 51 30 21 52 50 =1846+322 23 22 11 33.0 -69.3 4.5 71.5 80 1463 21 51 31 21 52 50 LSRJ1835+325 23 22 11 30.7 -67.5 4.8 70.7 -11 1463 No stop 21 56 50 --- 23 26 12 29.9 -67.2 4.8 70.3 229 1587 21 52 51 21 57 30 J1848+3219 23 26 52 32.1 -68.9 4.6 71.1 29 1587 21 57 30 21 58 50 =1846+322 23 28 12 31.8 -68.8 4.6 70.9 80 1628 21 57 31 21 58 50 LSRJ1835+325 23 28 12 29.5 -67.0 4.9 70.1 -11 1628 No stop 22 02 50 --- 23 32 13 28.7 -66.7 4.9 69.7 229 1752 21 58 51 22 03 30 J1848+3219 23 32 53 30.9 -68.4 4.7 70.5 29 1752 22 03 30 22 04 50 =1846+322 23 34 13 30.6 -68.3 4.8 70.4 80 1793 22 03 31 22 04 50 LSRJ1835+325 23 34 13 28.3 -66.5 5.0 69.5 -11 1793 No stop 22 08 50 --- 23 38 14 27.5 -66.2 5.0 69.1 229 1917 22 04 51 22 09 30 J1848+3219 23 38 54 29.7 -67.9 4.8 69.9 29 1917 22 09 30 22 10 50 =1846+322 23 40 14 29.4 -67.8 4.9 69.8 80 1958 22 09 31 22 10 50 J1834+3205 23 40 14 26.6 -66.9 5.1 68.4 -13 1958 No stop 22 12 50 --- 23 42 15 26.2 -66.7 5.1 68.3 107 2020 22 10 51 22 12 50 J1848+3219 23 42 15 29.0 -67.7 4.9 69.6 -13 2020 No stop 22 14 50 =1846+322 23 44 15 28.6 -67.5 4.9 69.5 107 2082 22 12 51 Schedule for TIANMA65 (Code T6 ) Page 4 LSR J1835 follow-up observations 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 ---------------------------------------------------------------------------------------- --- Sun 12 Jun 2022 Day 163 --- 22 14 50 LSRJ1835+325 23 44 15 26.3 -65.7 5.1 68.6 -11 2082 No stop 22 18 50 --- 23 48 16 25.6 -65.4 5.2 68.2 229 2205 22 14 51 22 19 30 J1848+3219 23 48 56 27.7 -67.1 5.0 69.0 29 2205 22 19 30 22 20 50 =1846+322 23 50 16 27.4 -67.0 5.0 68.9 80 2247 22 19 31 22 20 50 LSRJ1835+325 23 50 16 25.2 -65.2 5.2 68.0 -11 2247 No stop 22 24 50 --- 23 54 17 24.4 -64.8 5.3 67.6 229 2370 22 20 51 22 25 30 J1848+3219 23 54 57 26.5 -66.6 5.1 68.4 29 2370 22 25 30 22 26 50 =1846+322 23 56 17 26.2 -66.5 5.1 68.3 80 2411 22 25 31 22 26 50 LSRJ1835+325 23 56 17 24.0 -64.7 5.3 67.4 -11 2411 No stop 22 30 50 --- 00 00 18 23.2 -64.3 5.4 67.0 229 2535 22 26 51 22 31 30 J1848+3219 00 00 58 25.3 -66.1 5.2 67.9 29 2535 22 31 30 22 32 50 =1846+322 00 02 18 25.0 -65.9 5.2 67.7 80 2576 22 31 31 22 32 50 LSRJ1835+325 00 02 18 22.8 -64.1 5.4 66.8 -11 2576 No stop 22 36 50 --- 00 06 19 22.1 -63.8 5.5 66.3 229 2700 22 32 51 22 37 30 J1848+3219 00 06 59 24.1 -65.5 5.3 67.3 29 2700 22 37 30 22 38 50 =1846+322 00 08 19 23.9 -65.4 5.3 67.2 80 2741 22 37 31 22 38 50 LSRJ1835+325 00 08 19 21.7 -63.6 5.5 66.1 -11 2741 No stop 22 42 50 --- 00 12 20 20.9 -63.2 5.6 65.7 229 2865 22 38 51 22 43 30 J1848+3219 00 13 00 23.0 -65.0 5.4 66.7 29 2865 22 43 30 22 44 50 =1846+322 00 14 20 22.7 -64.9 5.4 66.6 80 2906 22 43 31 22 44 50 J1834+3205 00 14 20 20.0 -63.8 5.6 65.1 -13 2906 No stop 22 46 50 --- 00 16 20 19.6 -63.6 5.7 64.9 107 2968 22 44 51 22 46 50 J1848+3219 00 16 20 22.3 -64.7 5.5 66.4 -13 2968 No stop 22 48 50 =1846+322 00 18 21 21.9 -64.5 5.5 66.2 107 3030 22 46 51 22 48 50 LSRJ1835+325 00 18 21 19.8 -62.7 5.7 65.1 -11 3030 No stop 22 52 50 --- 00 22 21 19.0 -62.3 5.8 64.7 229 3153 22 48 51 22 53 30 J1848+3219 00 23 01 21.0 -64.1 5.6 65.7 29 3153 22 53 30 22 54 50 =1846+322 00 24 22 20.8 -63.9 5.6 65.6 80 3195 22 53 31 22 54 50 LSRJ1835+325 00 24 22 18.6 -62.1 5.8 64.5 -11 3195 No stop 22 58 50 --- 00 28 22 17.9 -61.7 5.9 64.0 229 3318 22 54 51 Schedule for TIANMA65 (Code T6 ) Page 5 LSR J1835 follow-up observations 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 ---------------------------------------------------------------------------------------- --- Sun 12 Jun 2022 Day 163 --- 22 59 30 J1848+3219 00 29 02 19.9 -63.5 5.7 65.1 30 3318 22 59 30 23 00 50 =1846+322 00 30 23 19.6 -63.4 5.7 65.0 80 3360 22 59 31 23 00 50 LSRJ1835+325 00 30 23 17.5 -61.5 5.9 63.8 -11 3360 No stop 23 04 50 --- 00 34 23 16.7 -61.1 6.0 63.4 229 3483 23 00 51 23 05 30 J1848+3219 00 35 03 18.7 -62.9 5.8 64.5 30 3483 23 05 30 23 06 50 =1846+322 00 36 24 18.5 -62.8 5.8 64.3 80 3524 23 05 31 23 06 50 LSRJ1835+325 00 36 24 16.4 -60.9 6.0 63.2 -11 3524 No stop 23 10 50 --- 00 40 24 15.6 -60.5 6.1 62.7 229 3648 23 06 51 23 11 30 J1848+3219 00 41 04 17.6 -62.3 5.9 63.9 30 3648 23 11 30 23 12 50 =1846+322 00 42 25 17.3 -62.2 5.9 63.7 80 3689 23 11 31 23 12 50 LSRJ1835+325 00 42 25 15.2 -60.3 6.1 62.5 -10 3689 No stop 23 16 50 --- 00 46 25 14.5 -59.9 6.2 62.1 230 3813 23 12 51 23 17 30 J1848+3219 00 47 05 16.4 -61.7 6.0 63.2 30 3813 23 17 30 23 18 50 =1846+322 00 48 26 16.2 -61.6 6.0 63.1 80 3854 23 17 31 23 18 50 J1834+3205 00 48 26 13.5 -60.5 6.2 61.6 -13 3854 No stop 23 20 50 --- 00 50 26 13.2 -60.2 6.2 61.4 107 3916 23 18 51 23 20 50 J1848+3219 00 50 26 15.8 -61.4 6.0 62.9 -12 3916 No stop 23 22 50 =1846+322 00 52 26 15.4 -61.2 6.1 62.7 108 3978 23 20 51 23 22 50 LSRJ1835+325 00 52 26 13.4 -59.3 6.3 61.4 -10 3978 No stop 23 26 50 --- 00 56 27 12.6 -58.9 6.3 61.0 230 4102 23 22 51 23 27 30 J1848+3219 00 57 07 14.6 -60.7 6.1 62.2 30 4102 23 27 30 23 28 50 =1846+322 00 58 27 14.3 -60.6 6.2 62.0 80 4143 23 27 31 23 28 50 LSRJ1835+325 00 58 27 12.3 -58.7 6.4 60.7 -10 4143 No stop 23 32 50 --- 01 02 28 11.5 -58.2 6.4 60.3 230 4266 23 28 51 23 33 30 J1848+3219 01 03 08 13.4 -60.1 6.2 61.5 30 4266 23 33 30 23 34 50 =1846+322 01 04 28 13.2 -60.0 6.3 61.4 80 4308 23 33 31 23 34 50 LSRJ1835+325 01 04 28 11.2 -58.0 6.5 60.0 -10 4308 No stop 23 38 50 --- 01 08 29 10.5 -57.6 6.5 59.6 230 4431 23 34 51 23 39 30 J1848+3219 01 09 09 12.3 -59.5 6.3 60.8 30 4431 23 39 30 23 40 50 =1846+322 01 10 29 12.1 -59.3 6.4 60.7 80 4473 23 39 31 Schedule for TIANMA65 (Code T6 ) Page 6 LSR J1835 follow-up observations 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 ---------------------------------------------------------------------------------------- --- Sun 12 Jun 2022 Day 163 --- 23 40 50 LSRJ1835+325 01 10 29 10.1 -57.4 6.6 59.3 -10 4473 No stop 23 44 50 --- 01 14 30 9.4 -57.0 6.6 58.9 230 4596 23 40 51 23 45 30 J1848+3219 01 15 10 11.2 -58.9 6.4 60.2 30 4596 23 45 30 23 46 50 =1846+322 01 16 30 11.0 -58.7 6.5 60.0 80 4637 23 45 31 23 46 50 LSRJ1835+325 01 16 30 9.0 -56.7 6.7 58.6 -10 4637 No stop 23 50 50 --- 01 20 31 8.3 -56.3 6.7 58.2 230 4761 23 46 51 23 51 30 J1848+3219 01 21 11 10.1 -58.2 6.5 59.5 30 4761 23 51 30 23 52 50 =1846+322 01 22 31 9.9 -58.1 6.6 59.3 80 4802 23 51 31 23 52 50 J1834+3205 01 22 31 7.3 -56.7 6.8 57.7 -12 4802 No stop 23 54 50 --- 01 24 32 7.0 -56.5 6.8 D 57.5 0 4864 23 52 51 23 54 50 J1848+3219 01 24 32 9.5 -57.8 6.6 59.1 -12 4864 No stop 23 56 50 =1846+322 01 26 32 9.1 -57.6 6.6 58.9 108 4926 23 54 51 --- Start: Sun 12 Jun 2022 Day 163 -- Stop: Mon 13 Jun 2022 Day 164 --- 23 56 50 LSRJ1835+325 01 26 32 7.2 -55.6 6.8 57.4 -10 4926 No stop 00 00 50 --- 01 30 33 6.5 -55.1 6.9 D 56.9 0 5050 23 56 51 00 01 40 J1848+3219 01 31 23 8.3 -57.1 6.7 58.3 42 5050 00 01 40 00 02 50 =1846+322 01 32 33 8.1 -56.9 6.7 58.2 70 5086 00 01 41 00 07 40 J1848+3219 01 37 24 7.2 -56.4 6.8 57.6 288 5086 00 07 40 00 08 50 =1846+322 01 38 34 7.0 -56.3 6.8 D 57.4 0 5122 00 07 41 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess222.C4096 --- WARNING --- This group does not match an entry in the frequency catalog. This might be ok because the catalog is not complete. But be very careful to be sure that the setup is correct. Setup group: 9 Station: TIANMA65 Total bit rate: 4096 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 32 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 4088.00 Net SB= L L U U L L U U L L U U L L U U L L U U L L U U L L U U L L U U IF SB = U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 9 1 9 2 10 2 10 3 11 3 11 4 12 4 12 5 13 5 13 6 14 6 14 7 15 7 15 8 16 8 16 BBC SB= L L U U L L U U L L U U L L U U L L U U L L U U L L U U L L U U IF = A4 C3 A4 C3 A4 C3 A4 C3 A4 C3 A4 C3 A4 C3 A4 C3 B4 D3 B4 D3 B4 D3 B4 D3 B4 D3 B4 D3 B4 D3 B4 D3 The following frequency sets based on these setups were used. Frequency Set: 7 Setup file default. Used with PCAL = off LO sum= 4632.00 4632.00 4632.00 4632.00 4696.00 4696.00 4696.00 4696.00 4760.00 4760.00 4760.00 4760.00 4824.00 4824.00 4824.00 4824.00 4888.00 4888.00 4888.00 4888.00 4952.00 4952.00 4952.00 4952.00 5016.00 5016.00 5016.00 5016.00 5080.00 5080.00 5080.00 5080.00 BBC fr= 544.00 544.00 544.00 544.00 608.00 608.00 608.00 608.00 672.00 672.00 672.00 672.00 736.00 736.00 736.00 736.00 800.00 800.00 800.00 800.00 864.00 864.00 864.00 864.00 928.00 928.00 928.00 928.00 992.00 992.00 992.00 992.00 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 7 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * LSRJ1835+325 18 33 46.940176 * 18 35 37.880357 18 36 28.546613 0.00 32 57 22.09729 * 32 59 53.31134 33 00 53.55686 0.00 From catalog imbedded in main SCHED input file. * J1834+3205 18 32 56.698696 * 18 34 49.087200 18 35 40.384117 0.00 32 02 57.74164 * 32 05 25.38800 32 06 24.18733 0.00 From catalog imbedded in main SCHED input file. * 1830+285 18 30 52.379792 * 18 32 50.185623 18 33 43.841222 0.03 J1832+2833 28 31 17.07914 * 28 33 35.95525 28 34 31.33657 0.04 J1832+28 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 1329 observations. 1846+322 18 46 29.612030 * 18 48 22.088573 18 49 13.384039 0.00 * J1848+3219 32 15 36.66044 * 32 19 02.60384 32 20 26.66636 0.00 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 38727 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 LSRJ1835+32sess222.C4096 1 2 3 4 5 6 7 8 9 11 12 13 3.400 200.396 J1834+3205 sess222.C4096 1 2 3 4 5 6 7 8 9 11 12 13 0.300 15.148 1830+285 sess222.C4096 1 2 3 4 5 6 7 8 9 11 12 13 0.200 12.443 J1848+3219 sess222.C4096 1 2 3 4 5 6 7 8 9 11 12 13 1.414 91.213 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) LSRJ1835+325 121.3 J1834+3205 122.2 1830+285 125.7 J1848+3219 120.9 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