Session Notes for session: r4022 Prepared by Merri Sue Carter, USNO. (msc@maia.usno.navy.mil) =========================================================== Parameter values for experiment R4022 Experiment description: NEOSA Scheduler: tbd Correlator: TBD Nominal start: 2002-150-18:30:00 Nominal end: 2002-151-18:45:00 Current yyyyddd: 2002150 (2002.41) ( 12425 MJD, THUR 30MAY.) Greenwich sidereal time: 11: 2:23.26 (18:30: 0 UT) Sun's RA and DEC: 4h 29.9m 21d 49.5 ========================================================== The following sources were included for research purposes: 1023+131, 1538+149, 1952+138, 1754+159 We were unable to observe 0406+121. (10 degrees from sun) =========================================================== First observations Observation listing from file ./r4022.skd for experiment R4022 Source Start DURATIONS name yyddd-hhmmss Ap Gc Ho Kk Ny Wz 0014+813 02150-183000| 98 145 145| 2136+141 02150-183000| 98 98 98 | 1357+769 02150-183401| 98 98 98 | 3C274 02150-183448| 98 98| 1749+096 02150-183718| 118 118| End of listing. =========================================================== Last observations Observation listing from file ./r4022.skd for experiment R4022 Source Start DURATIONS name yyddd-hhmmss Ap Gc Ho Kk Ny Wz 2126-158 02151-182659| 181 181 | End of listing. Observation listing from file ./r4022.skd for experiment R4022 Source Start DURATIONS name yyddd-hhmmss Ap Gc Ho Kk Ny Wz 3C446 02151-181650| 98 98 | 0133+476 02151-181949| 98 98 98 98| 0552+398 02151-182226| 98 98 98| 0229+131 02151-182350| 98 98 | 1754+159 02151-182636| 263 341 341| 2126-158 02151-182659| 181 181 | End of listing. =========================================================== SKED Summary from file ./r4022.skd for experiment R4022 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.4 Min = .0 Max = 48.0 (Baseline Ny-Wz on 1351-018) RMS = 5.3 Total time: 1440 minutes ( 24.0 hours). Key: Ap=ALGOPARK Gc=GILCREEK Ho=HOBART26 Kk=KOKEE Ny=NYALES20 Wz=WETTZELL Ap Gc Ho Kk Ny Wz Avg % obs. time: 31 49 29 51 56 55 45 % cal. time: 2 3 1 3 3 3 3 % slew time: 51 19 29 16 17 10 24 % idle time: 14 27 39 28 22 30 27 # of tapes : 1.6 .8 1.5 .8 .8 .8 total # scans: 251 288 156 284 308 294 263 # scans/hour : 10 12 6 11 12 12 11.0 Avg scan (sec): 106 149 163 155 158 163 149 tape change times (hhmm): 0950 0000 1113 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Ap Gc Ho Kk Ny Wz StnTotal -------------------------------------- Ap|251 163 12 115 120 110 520 Gc| 288 51 154 126 114 608 Ho| 156 120 18 19 220 Kk| 284 65 39 493 Ny| 308 246 575 Wz| 294 528 Number of 2-station scans: 333 Number of 3-station scans: 179 Number of 4-station scans: 77 Number of 5-station scans: 14 Number of 6-station scans: 0 Total # of scans, observations: 603 1472 =========================================================== Recording mode Name Code NEOS-WB NW Recording mode setup for: ALGOPARK HOBART26 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: GILCREEK KOKEE NYALES20 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 ) Gc GILCREEK 17400feet (Thin ) 56250. (High) Ho HOBART26 8700feet (Thick) 33333. (Low ) Kk KOKEE 17400feet (Thin ) 56250. (High) Ny NYALES20 17400feet (Thin ) 56250. (High) Wz WETTZELL 17400feet (Thin ) 56250. (High) =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 10) S-band (margin 6) Ap Gc Ho Kk Ny Ap Gc Ho Kk Ny Gc 20 Gc 15 Ho 20 20 Ho 15 15 Kk 20 20 20 Kk 15 15 15 Ny 20 20 20 20 Ny 15 15 15 15 Wz 20 20 20 20 20 Wz 15 15 15 15 15