NOTES FOR: rd0307 Prepared by C. Thomas, NVI, Inc./GSFC =========================================================== Parameter values for experiment RD0307 Experiment description: R&D Scheduler: NASA Correlator: WACO Nominal start: 2003-239-18:00:00 Nominal end: 2003-240-18:00:00 Current yyyyddd: 2003239 (2003.65) ( 12879 MJD, WED. 27AUG.) Greenwich sidereal time: 16:22:14.47 (18: 0: 0 UT) Sun's RA and DEC: 10h 23.8m 10d 1.2 =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Ap Gc Kk Ny Tc Wf Wz 1156+295 03239-180000| 98 306 240 601 601 211 428| =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ap Gc Kk Ny Tc Wf Wz 1334-127 03240-172433| 98 262 262 191| 0202+149 03240-172439| 98 98 98 | 1739+522 03240-173047| 98 98 98 98 98| 0804+499 03240-173448| 132 163 228 228 195| 2201+315 03240-174059| 98 98 | 3C274 03240-174723| 98 122 98 216 216| =========================================================== Purpose of Experiment The goal of the 10 R&D sessions in 2003 as decided by the IVS Program Committee is to compare the results of the IVS-R1 and the IVS-R4 sessions. The IVS-R4 sessions seem to be achieving better earth orientation results with a lower data rate (56 vs. 256). The R&D sessions are being scheduled to aide the analysts in understanding the 2002 results of the IVS-R1 and IVS-R4 sessions by scheduling sessions with a simular IVS-R4 network using the IVS-R1 observing mode. Type of Experiment This experiment uses a 7-station northern hemisphere geodetic network. The R&D sessions are scheduled monthly, adjacent to the IVS-R4 sessions with the same stations except one. Westford will participate in the R&D and the IVS-R4 sessions will have Fortaleza. Fortaleza can not participate in the R&D session because those sessions will be scheduled with the Mark IV mode. Fortaleza has not been upgraded to Mark IV or higher as yet. C. Thomas took the IVS-R4 schedule, prepared by M. Carter, and replaced Fortaleza with Westford and replaced the GEOSXR4 (112 data rate) with the GEOSX4F (256 data rate) recording mode. The R&D schedule was made with the new stations and recording mode. =========================================================== SKED Summary from file ./rd0307.skd for experiment RD0307 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.5 Min = .0 Max = 81.7 (Baseline Ny-Wz on 1749+096) RMS = 6.0 Total time: 1429 minutes ( 23.8 hours). Key: Ap=ALGOPARK Gc=GILCREEK Kk=KOKEE Ny=NYALES20 Tc=TIGO Wf=WESTFORD Wz=WETTZELL Ap Gc Kk Ny Tc Wf Wz Avg % obs. time: 22 32 38 36 27 37 35 32 % cal. time: 2 2 2 2 1 2 2 2 % slew time: 59 18 14 15 4 11 9 19 % idle time: 15 45 44 45 66 48 52 45 # of tapes : 1.2 1.8 2.1 2.0 1.6 2.1 1.9 total # scans: 187 247 223 241 101 225 220 206 # scans/hour : 7 10 9 10 4 9 9 8.6 Avg scan (sec): 102 114 147 128 236 143 137 143 tape change times (hhmm): 1420 0731 0547 0508 0731 0458 0625 0000 0000 1711 0000 0000 1747 0000 # OF OBSERVATIONS BY BASELINE | Ap Gc Kk Ny Tc Wf Wz StnTotal ------------------------------------------ Ap|187 136 104 122 52 180 113 707 Gc| 247 186 173 36 152 127 810 Kk| 223 115 62 123 71 661 Ny| 241 23 152 193 778 Tc| 101 69 40 282 Wf| 225 145 821 Wz| 220 689 Number of 2-station scans: 128 Number of 3-station scans: 65 Number of 4-station scans: 65 Number of 5-station scans: 77 Number of 6-station scans: 51 Number of 7-station scans: 6 Total # of scans, observations: 392 2374 =========================================================== Recording mode Name Code GEOSX4F 4F Recording mode setup for: ALGOPARK Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 256.000 Mbits 128.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 8.00 MHz 1 16(*2) 32 160.00 X-band spanned bw= 720.0 MHz rms spanned bw= 280.4 MHz S-band spanned bw= 120.0 MHz rms spanned bw= 48.8 MHz Effective number of channels recorded per sub-pass X S Total 10.000 6.000 16.000 Recording mode setup for: GILCREEK Mode Tot.Rate Tot.BandW #chan #bits Barrel VLBA1:2 256.000 Mbits 128.000 MHz 14 1 8:1 Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 8.00 MHz 1 16(*2) 32 160.00 X-band spanned bw= 720.0 MHz rms spanned bw= 280.4 MHz S-band spanned bw= 120.0 MHz rms spanned bw= 48.8 MHz Effective number of channels recorded per sub-pass X S Total 10.000 6.000 16.000 Recording mode setup for: KOKEE Mode Tot.Rate Tot.BandW #chan #bits Barrel VLBA1:2 256.000 Mbits 128.000 MHz 14 1 16:1 Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 8.00 MHz 1 16(*2) 32 160.00 X-band spanned bw= 720.0 MHz rms spanned bw= 280.4 MHz S-band spanned bw= 120.0 MHz rms spanned bw= 48.8 MHz Effective number of channels recorded per sub-pass X S Total 10.000 6.000 16.000 Recording mode setup for: NYALES20 TIGOCONC WESTFORD WETTZELL Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 256.000 Mbits 128.000 MHz 14 1 16 Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 8.00 MHz 1 16(*2) 32 160.00 X-band spanned bw= 720.0 MHz rms spanned bw= 280.4 MHz S-band spanned bw= 120.0 MHz rms spanned bw= 48.8 MHz Effective number of channels recorded per sub-pass X S Total 10.000 6.000 16.000 =========================================================== Tape types ID Station Tape length Density Ap ALGOPARK 17400feet (Thin ) 56250. (High) Gc GILCREEK 17400feet (Thin ) 56700. (High) Kk KOKEE 17400feet (Thin ) 56700. (High) Ny NYALES20 17400feet (Thin ) 56250. (High) Tc TIGOCONC 17400feet (Thin ) 56250. (High) Wf WESTFORD 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 Gc Kk Ny Tc Wf Ap Gc Kk Ny Tc Wf Gc 20 Gc 15 Kk 20 20 Kk 15 15 Ny 20 20 20 Ny 15 15 15 Tc 15 15 15 15 Tc 12 12 12 12 Wf 20 20 20 20 15 Wf 15 15 15 15 12 Wz 20 20 20 20 15 20 Wz 15 15 15 15 12 15