Session Notes for session: r4026 Prepared by Merri Sue Carter, USNO. (msc@maia.usno.navy.mil) =========================================================== Parameter values for experiment R4026 Experiment description: NEOSA Scheduler: tbd Correlator: TBD Nominal start: 2002-178-18:30:00 Nominal end: 2002-179-18:45:00 Current yyyyddd: 2002178 (2002.49) ( 12453 MJD, THUR 27JUN.) Greenwich sidereal time: 12:52:46.81 (18:30: 0 UT) Sun's RA and DEC: 6h 25.8m 23d 18.3 ========================================================== The following sources were included for research purposes: 0406+121, 0459+135, 0508+138, 0509+152 =========================================================== First observations Observation listing from file ./r4026.skd for experiment R4026 Source Start DURATIONS name yyddd-hhmmss Ap Gc Ho Kk Ny Wz 0014+813 02178-183000| 98 145 145| 2136+141 02178-183000| 98 98 98 | 0458-020 02178-183409| 153 153 | OQ208 02178-183509| 98 98 98| 1749+096 02178-183745| 98 98| End of listing. =========================================================== Last observations Observation listing from file ./r4026.skd for experiment R4026 Source Start DURATIONS name yyddd-hhmmss Ap Gc Ho Kk Ny Wz 0642+449 02179-182847| 98 98 98 98 98| End of listing. Observation listing from file ./r4026.skd for experiment R4026 Source Start DURATIONS name yyddd-hhmmss Ap Gc Ho Kk Ny Wz 0202+149 02179-181519| 98 98 98 | 1156+295 02179-181737| 98 98 98| 0406+121 02179-181805| 98 98 | 0458-020 02179-182035| 155 155 | 0718+793 02179-182305| 98 198 198| 0642+449 02179-182847| 98 98 98 98 98| End of listing. =========================================================== SKED Summary from file ./r4026.skd for experiment R4026 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.9 Min = .0 Max = 45.0 (Baseline Ny-Wz on 0458-020) RMS = 5.4 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: 32 51 28 50 53 55 45 % cal. time: 2 3 1 3 3 3 3 % slew time: 49 17 27 16 16 10 22 % idle time: 15 27 42 30 26 30 28 # of tapes : 1.7 .8 1.6 .8 .8 .8 total # scans: 256 291 159 289 303 298 266 # scans/hour : 10 12 6 12 12 12 11.1 Avg scan (sec): 108 153 154 150 153 161 146 tape change times (hhmm): 0929 0000 0849 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Ap Gc Ho Kk Ny Wz StnTotal -------------------------------------- Ap|256 168 13 125 126 131 563 Gc| 291 51 161 137 129 646 Ho| 159 122 27 21 234 Kk| 289 80 46 534 Ny| 303 234 604 Wz| 298 561 Number of 2-station scans: 306 Number of 3-station scans: 179 Number of 4-station scans: 83 Number of 5-station scans: 23 Number of 6-station scans: 0 Total # of scans, observations: 591 1571 =========================================================== 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