NOTES FOR: rd0304 Prepared by C. Thomas, NVI, Inc./GSFC =========================================================== Parameter values for experiment RD0304 Experiment description: R&D Scheduler: NASA Correlator: HAYSTACK Nominal start: 2003-113-18:00:00 Nominal end: 2003-114-18:00:00 Current yyyyddd: 2003113 (2003.31) ( 12753 MJD, WED. 23APR.) Greenwich sidereal time: 8: 5:28.49 (18: 0: 0 UT) Sun's RA and DEC: 2h 3.8m 12d 34.3 =========================================================== First observations Observation listing from file ./rd0304.skd for experiment RD0304 Source Start DURATIONS name yyddd-hhmmss Ap Gc Kk Ny Tc Wf Wz 0454-234 03113-180000| 98 98 98 | 1611+343 03113-180000| 98 98 98 98| =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ap Gc Kk Ny Tc Wf Wz 2136+141 03114-173708| 98 98 98 98 | 0727-115 03114-174007| 98 98 98| CTA26 03114-174408| 98 98 98 98| 1156+295 03114-174701| 98 98| =========================================================== 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 ./rd0304.skd for experiment RD0304 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 4.0 Min = .0 Max = 68.6 (Baseline Ny-Wz on 1741-038) RMS = 6.3 Total time: 1428 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: 23 28 29 30 37 41 32 32 % cal. time: 2 2 2 2 2 2 2 2 % slew time: 51 15 11 13 6 11 8 17 % idle time: 22 53 56 52 53 44 56 48 # of tapes : 1.3 1.6 1.6 1.7 2.1 2.4 1.8 total # scans: 192 203 194 194 173 225 203 197 # scans/hour : 8 8 8 8 7 9 8 8.2 Avg scan (sec): 104 121 129 136 186 157 139 138 tape change times (hhmm): 1314 1022 0851 0739 0524 0342 0750 0000 0000 0000 0000 1728 1445 0000 # OF OBSERVATIONS BY BASELINE | Ap Gc Kk Ny Tc Wf Wz StnTotal ------------------------------------------ Ap|192 128 112 118 113 189 115 775 Gc| 203 157 142 58 137 114 736 Kk| 194 99 84 122 72 646 Ny| 194 51 136 165 711 Tc| 173 136 79 521 Wf| 225 142 862 Wz| 203 687 Number of 2-station scans: 101 Number of 3-station scans: 53 Number of 4-station scans: 51 Number of 5-station scans: 76 Number of 6-station scans: 58 Number of 7-station scans: 13 Total # of scans, observations: 352 2469 =========================================================== 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