NOTES FOR: rd0309 Prepared by C. Thomas, NVI, Inc./GSFC =========================================================== Parameter values for experiment RD0309 Experiment description: R&D Scheduler: NASA Correlator: HAYSTACK Nominal start: 2003-295-18:00:00 Nominal end: 2003-296-18:00:00 Current yyyyddd: 2003295 (2003.81) ( 12935 MJD, WED. 22OCT.) Greenwich sidereal time: 20: 3: 1.57 (18: 0: 0 UT) Sun's RA and DEC: 13h 47.5m -11d 5.4 =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Ap Gc Kk Ny Tc Wf Wz 1611+343 03295-180000| 98 144 144 119| 1300+580 03295-180000| 98 98 98 | =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ap Gc Kk Ny Tc Wf Wz 1611+343 03296-174202| 98 98 125 144 144 119| 1739+522 03296-174628| 98 98 98 98 98| 0748+126 03296-174956| 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 ./rd0309.skd for experiment RD0309 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.2 Min = .0 Max = 70.2 (Baseline Ny-Wz on 1741-038) RMS = 5.1 Total time: 1431 minutes ( 23.9 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: 18 30 34 37 48 43 36 35 % cal. time: 1 2 2 2 1 2 2 1 % slew time: 53 15 11 11 4 9 7 16 % idle time: 25 51 52 49 45 44 54 46 # of tapes : 1.1 1.8 1.9 2.1 2.9 2.4 2.0 total # scans: 157 189 174 182 120 187 173 168 # scans/hour : 6 7 7 7 5 7 7 7.0 Avg scan (sec): 103 140 170 175 344 198 178 186 tape change times (hhmm): 1742 0814 0614 0738 0202 0301 0709 0000 0000 0000 1714 1141 1332 0000 # OF OBSERVATIONS BY BASELINE | Ap Gc Kk Ny Tc Wf Wz StnTotal ------------------------------------------ Ap|157 118 93 104 69 149 89 622 Gc| 189 142 136 44 130 103 673 Kk| 174 95 64 106 61 561 Ny| 182 35 124 146 640 Tc| 120 89 53 354 Wf| 187 119 717 Wz| 173 571 Number of 2-station scans: 92 Number of 3-station scans: 45 Number of 4-station scans: 40 Number of 5-station scans: 72 Number of 6-station scans: 49 Number of 7-station scans: 7 Total # of scans, observations: 305 2069 =========================================================== 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