NOTES FOR: rd0303 Prepared by C. Thomas, NVI, Inc./GSFC =========================================================== Parameter values for experiment RD0303 Experiment description: R&D Scheduler: NASA Correlator: WACO Nominal start: 2003-085-18:00:00 Nominal end: 2003-086-18:00:00 Current yyyyddd: 2003085 (2003.23) ( 12725 MJD, WED. 26MAR.) Greenwich sidereal time: 6:15: 4.94 (18: 0: 0 UT) Sun's RA and DEC: 0h 20.8m 2d 15.1 =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Ap Gc Kk Ny Tc Wf Wz 2136+141 03085-180000| 89 119 119 | 4C39.25 03085-180000| 40 40 40 40| =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ap Gc Kk Ny Tc Wf Wz 2136+141 03086-173312| 89 414 119 712 712 227 | 0059+581 03086-174559| 40 40 40 40 40 40| 1741-038 03086-174840| 40 40 | =========================================================== 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 two. 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.Due to scheduling constraints, Fairbanks will not participate in the adjacent R4 session. C. Thomas took the IVS-R4 schedule, prepared by M. Carter, replaced Fortaleza with Westford, replaced Matera with Fairbanks, 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 ./rd0303.skd for experiment RD0303 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 4.4 Min = .0 Max = 46.5 (Baseline Ny-Wz on 0458-020) RMS = 6.1 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: 11 27 28 33 48 35 30 30 % cal. time: 2 2 2 2 1 2 2 2 % slew time: 52 15 11 13 5 10 7 16 % idle time: 33 54 58 50 44 51 59 50 # of tapes : .7 1.6 1.6 1.9 2.9 1.9 1.8 total # scans: 187 210 190 201 127 207 180 186 # scans/hour : 7 8 7 8 5 8 7 7.8 Avg scan (sec): 54 111 127 143 329 146 146 150 tape change times (hhmm): 0000 1012 0932 0635 0243 0545 0652 0000 0000 0000 0000 1125 0000 0000 # OF OBSERVATIONS BY BASELINE | Ap Gc Kk Ny Tc Wf Wz StnTotal ------------------------------------------ Ap|187 141 113 129 79 177 111 750 Gc| 210 154 160 45 140 114 754 Kk| 190 107 68 114 65 621 Ny| 201 40 136 155 727 Tc| 127 98 54 384 Wf| 207 129 794 Wz| 180 628 Number of 2-station scans: 93 Number of 3-station scans: 49 Number of 4-station scans: 53 Number of 5-station scans: 64 Number of 6-station scans: 60 Number of 7-station scans: 11 Total # of scans, observations: 330 2329 =========================================================== 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 20 20 15 20 Tc 15 15 10 15 Wf 20 20 20 20 15 Wf 15 15 15 15 10 Wz 20 20 20 20 20 20 Wz 15 15 15 15 15 15