CORE-B802 / CB802 2000 Nov 2-3 307/19:00 - 308/19:00 Haystack correlator expt #2863 Fourfit quality code summary: 49% 7-9 3% 1-6,A-H 3% 0 (non-detection) 45% no data Algonquin(G): Missed 6 observations due to antenna drive circuit breaker tripping. Kokee(K): Fringed with manual phases. Out for Intensives during 19:00-20:22 and 18:08-19:00. Noto(S): Fringes and phase cal disappeared during scan 308-1159 and did not return until scan 308-1418. A comment in the log at 14:06 noted "problems with the up converter." During ~15 scans between 04:30 and 08:00, the fringe and pcal phases in channel S5 showed jumps and drifts of 90-360 deg due to BBC13 LO phase instability. Similarly, the phases in channel X7 were unstable by 60-90 deg for a few scans between 09:00 and 11:30 due to BBC07 LO phase wander. Any effect on the multiband delay should be small compared to the standard error. Ny Alesund(O): OK. Seshan(C): No data from 16:37 to end of session -- the tape tracks appear to have been overwritten. Urumqi(U): Did not correlate scans during 00:00-11:00. Error messages and comments in log indicate large antenna pointing errors, probably related to improper clock setting in the pointing system. Prepass spot checks on ~10 scans during this time span found fringes in only 1 case, on a high declination source at S-band. Did not correlate last 30 minutes of session -- recorder headstack was in wrong position. Fringe amplitude in channel S6 was weaker than in other S channels by a factor of 3. Deleted S6 in fringing. Fringes in channel X7 frequently disappeared. Deleted X7 in fringing. Fourfit 'G' codes in some X-band scans due to intermittently weak fringes in channel X3 -- most likely a VC03 problem. Fringed with manual phases. Phase cal phase differences between channels were highly unstable. Fringe amplitudes in many scans were reduced significantly by poor LO phase coherence on time scales from under 5 seconds (the length of the correlator accumulation period) to minutes. Yebes(Y): Did not correlate. A component failure in the formatter caused the tape clock signal to be improperly generated, thereby rendering the tape unreadable. Problem was recognized during the session, and it was diagnosed and fixed shortly thereafter. $ Qcodes 0 1 2 3 4 5 6 7 8 9 A B C D E F G H N - Tot ----------------------------------------------------------------------------- GK:X 2 0 0 0 0 0 1 0 4 106 0 0 0 0 0 0 0 0 0 13 126 GK:S 0 0 0 0 0 0 1 1 5 106 0 0 0 0 0 0 0 0 0 13 126 GS:X 7 0 0 0 0 2 0 1 9 92 0 0 0 0 0 0 0 0 0 4 115 GS:S 7 0 0 0 0 0 0 1 6 95 0 0 0 0 0 0 2 0 0 4 115 GO:X 1 0 0 0 0 0 0 3 12 105 0 0 0 0 0 0 0 0 0 4 125 GO:S 1 0 0 0 0 5 6 12 30 67 0 0 0 0 0 0 0 0 0 4 125 GC:X 0 0 0 0 0 0 0 0 1 33 0 0 0 0 0 0 0 0 0 9 43 GC:S 0 0 0 0 0 0 0 0 0 34 0 0 0 0 0 0 0 0 0 9 43 GU:X 1 0 0 0 0 3 6 12 3 8 0 0 0 0 0 0 5 0 0 26 64 GU:S 0 0 0 0 0 1 0 3 15 19 0 0 0 0 0 0 0 0 0 26 64 GY:X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 110 110 GY:S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 110 110 KS:X 3 0 0 0 0 0 0 0 3 17 0 0 0 0 0 0 0 0 0 7 30 KS:S 3 0 0 0 0 0 0 0 1 19 0 0 0 0 0 0 0 0 0 7 30 KO:X 0 0 0 0 0 0 0 0 10 54 0 0 0 0 0 0 0 0 0 13 77 KO:S 0 0 0 0 0 4 3 5 7 45 0 0 0 0 0 0 0 0 0 13 77 KC:X 0 0 0 0 0 0 0 1 7 88 0 0 0 0 0 0 0 0 0 27 123 KC:S 1 0 0 0 0 0 0 0 1 94 0 0 0 0 0 0 0 0 0 27 123 KU:X 3 0 0 0 0 2 4 3 2 24 0 0 0 0 0 0 6 0 0 43 87 KU:S 0 0 0 0 0 2 1 2 11 28 0 0 0 0 0 0 0 0 0 43 87 KY:X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 26 26 KY:S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 26 26 SO:X 12 0 0 0 0 0 1 0 10 125 0 0 0 0 0 0 0 0 0 0 148 SO:S 10 0 0 0 0 0 3 9 21 101 0 0 0 0 0 0 4 0 0 0 148 SC:X 7 0 0 0 0 0 0 0 3 55 0 0 0 0 0 0 0 0 0 4 69 SC:S 6 0 0 0 0 0 0 0 1 58 0 0 0 0 0 0 0 0 0 4 69 SU:X 19 0 0 0 0 4 1 4 3 29 0 1 0 0 0 0 6 0 0 61 128 SU:S 15 0 0 0 0 3 1 4 10 34 0 0 0 0 0 0 0 0 0 61 128 SY:X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 190 190 SY:S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 190 190 OC:X 0 0 0 0 0 0 0 1 6 72 0 0 0 0 0 0 0 0 0 12 91 OC:S 0 0 0 0 0 0 1 3 8 67 0 0 0 0 0 0 0 0 0 12 91 OU:X 5 0 0 0 0 12 5 8 4 34 0 0 0 0 0 0 10 0 0 56 134 OU:S 3 0 0 0 0 6 1 6 17 45 0 0 0 0 0 0 0 0 0 56 134 OY:X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 119 119 OY:S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 119 119 CU:X 1 0 0 0 0 11 4 16 3 27 0 0 0 0 0 0 7 0 0 88 157 CU:S 2 0 0 0 0 0 1 4 2 60 0 0 0 0 0 0 0 0 0 88 157 CY:X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40 40 CY:S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40 40 UY:X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 86 86 UY:S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 86 86 ----------------------------------------------------------------------------- Totals 109 0 0 0 0 55 40 99 215 1741 0 1 0 0 0 0 40 0 0 1876 4176