Session Notes for session: r4020 Prepared by Merri Sue Carter, USNO. (msc@maia.usno.navy.mil) =========================================================== Parameter values for experiment R4020 Experiment description: NEOSA Scheduler: tbd Correlator: TBD Nominal start: 2002-136-18:30:00 Nominal end: 2002-137-19:00:00 Current yyyyddd: 2002136 (2002.37) ( 12411 MJD, THUR 16MAY.) Greenwich sidereal time: 10: 7:11.48 (18:30: 0 UT) Sun's RA and DEC: 3h 33.5m 19d 11.2 ========================================================== The following sources were included for research purposes: 0748+126, 1423+146, 1920+154 The following source was not observed because it was too near the sun. 0253+133 =========================================================== First observations Observation listing from file ./r4020.skd for experiment R4020 Source Start DURATIONS name yyddd-hhmmss Ap Ft Kk Sh Wz 0727-115 02136-183000| 98 98| 1357+769 02136-183000| 98 98 98 | 1920+154 02136-183656| 226 226 | 0748+126 02136-184217| 98 177 177| 1334-127 02136-184611| 98 98| End of listing. =========================================================== Last observations Observation listing from file ./r4020.skd for experiment R4020 Source Start DURATIONS name yyddd-hhmmss Ap Ft Kk Sh Wz 1418+546 02137-182846| 190 663 663| End of listing. Observation listing from file ./r4020.skd for experiment R4020 Source Start DURATIONS name yyddd-hhmmss Ap Ft Kk Sh Wz 3C274 02137-180531| 386 386| 0119+115 02137-180939| 313 313 | 1611+343 02137-181519| 98 98| 2356+385 02137-181656| 155 155 | 1357+769 02137-182314| 98 154 189 189| 1418+546 02137-182846| 190 663 663| End of listing. =========================================================== SKED Summary from file ./r4020.skd for experiment R4020 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 2.6 Min = .0 Max = 20.0 (Baseline Ap-Ft on 1334-127) RMS = 3.7 Total time: 1442 minutes ( 24.0 hours). Key: Ap=ALGOPARK Ft=FORTLEZA Kk=KOKEE Sh=SESHAN25 Wz=WETTZELL Ap Ft Kk Sh Wz Avg % obs. time: 28 28 42 37 47 36 % cal. time: 2 1 2 1 2 2 % slew time: 48 20 12 35 8 24 % idle time: 20 49 43 25 42 36 # of tapes : 1.5 1.6 .6 .5 .7 total # scans: 201 122 195 163 199 176 # scans/hour : 8 5 8 6 8 7.3 Avg scan (sec): 124 199 189 199 204 183 tape change times (hhmm): 1023 0512 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Ap Ft Kk Sh Wz StnTotal ---------------------------------- Ap|201 88 125 46 104 363 Ft| 122 39 6 91 224 Kk| 195 103 51 318 Sh| 163 91 246 Wz| 199 337 Number of 2-station scans: 209 Number of 3-station scans: 107 Number of 4-station scans: 34 Number of 5-station scans: 1 Total # of scans, observations: 351 744 =========================================================== Recording mode Name Code NEOS-WB NW Recording mode setup for: ALGOPARK FORTLEZA Mode Tot.Rate Tot.BandW #chan #bits Barrel C 56.000 Mbits 28.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 2.00 MHz 2 14(*0) 28 135.00 X-band spanned bw= 680.0 MHz rms spanned bw= 252.6 MHz S-band spanned bw= 110.0 MHz rms spanned bw= 43.7 MHz Effective number of channels recorded per sub-pass X S Total 8.000 6.000 14.000 Recording mode setup for: KOKEE SESHAN25 WETTZELL Mode Tot.Rate Tot.BandW #chan #bits Barrel C 56.000 Mbits 28.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 2.00 MHz 2 14(*0) 28 80.00 X-band spanned bw= 680.0 MHz rms spanned bw= 252.6 MHz S-band spanned bw= 110.0 MHz rms spanned bw= 43.7 MHz Effective number of channels recorded per sub-pass X S Total 8.000 6.000 14.000 =========================================================== Tape types ID Station Tape length Density Ap ALGOPARK 8700feet (Thick) 33333. (Low ) Ft FORTLEZA 8700feet (Thick) 33333. (Low ) Kk KOKEE 17400feet (Thin ) 56250. (High) Sh SESHAN25 17400feet (Thin ) 56250. (High) Wz WETTZELL 17400feet (Thin ) 56250. (High) =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 5) S-band (margin 3) Ap Ft Kk Sh Ap Ft Kk Sh Ft 20 Ft 15 Kk 20 20 Kk 15 15 Sh 20 20 20 Sh 15 15 15 Wz 20 20 20 20 Wz 15 15 15 15