Session Notes for rd1002 Prepared by K. Baver, NVI, Inc./GSFC Schedule date: 2010-Feb-17 In 2009, four R&D sessions, RD0907 through RD0910, tested a proposed, new strategy for scheduling the IVS-INT01 sessions that provide rapid, preliminary UT1 estimates. The purpose of the proposed strategy was to improve the precision of these estimates. In 2010, a second series of R&D sessions will supplement the initial testing of the strategy. Details are given below. The new series started with RD1001, and RD1002 is the second session in the series. We divide the eight stations in this session into two subnets which are scheduled independently: 1.) The first subnet is the intensive network of Kokee-Wettzell. This will start at 19:21, after the conclusion of the IVS-INT01 session on February 17, and end at 17:21 on February 18. 2.) The second subnet is Medicina, NyAlesund, Onsala, Tigo, Tsukuba, and Westford. This runs from 17:30 on February 17 to 17:30 on February 18. The Kokee-Wettzell network is scheduled as a series of 22 consecutive, independent intensives using alternating strategies. A) STANDARD INTENSIVES. The intensives that start within odd hours (e.g., 19:21, 21:21, 23:21... etc) are scheduled using the standard intensive sources and scheduling strategy. B) TEST INTENSIVES. The intensives that start within even hours (e.g., 20:21, 22:21, 00:21, ... etc) are scheduled using an enlarged source list. Unlike 24 hour sessions, which can observe the whole sky, intensives can observe only a small slice of the sky, and this slice varies depending on when the intensive starts and the time of the year. Because of this, the results from the sessions might depend on what part of the sky is observed. In the first series of R&D sessions, RD0907 through RD0910, the start times were chosen so that the intensives would be consistent between sessions. The STANDARD INTENSIVES always looked at a part of the sky sampled by STANDARD INTENSIVES in other sessions. The TEST INTENSIVES looked at a part of the sky observed by TEST INTENSIVES in other sessions. To control for the fact that each of the STANDARD and TEST INTENSIVE series observed only half of the sky in the previous series, we swap things around in the new series. Each STANDARD INTENSIVE will observe a slice of the sky previously observed by a TEST INTENSIVE, and vice-versa. The six station network observes independently and serves as an independent external check on EOP. The GSFC analysis center will analyze the 22 pseudo intensive sessions with a view towards determining if one of the scheduling strategies is better in terms of things like: lower formal errors; better agreement with independent measures of UT1; and robustness of the schedule. The schedule uses the standard R1 256 data-rate. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD1002 Description R&D-02 2010. Intensive test Scheduler: NASA Correlator: HAYSTACK Start: 2010-048-17:30:00 End: 2010-049-17:30:00 Current yyyyddd: 2010048 (2010.13) ( 15245 MJD, WED. 17FEB.) Greenwich sidereal time: 3:20: 0.00 (17:30: 0 UT) Sun's RA and DEC: 22h 4.3m -11d 50.5 =========================================================== First observations Observation listing from file ./rd1002.skd for experiment RD1002 Source Start DURATIONS name yyddd-hhmmss Kk Mc Ny On Tc Ts Wf Wz 3C418 10048-173000| 30 62 71 30 71 | 2141+175 10048-173206| 97 204 500 500 311 | 1300+580 10048-173823| 35 66 30 66 | 0804+499 10048-174230| 36 82 166 159 166 | 0823+033 10048-174621| 31 79 79 38 | 1657-261 10048-174813| 158 158 | 0229+131 10048-174935| 30 30 36 36 | 3C371 10048-175256| 31 64 76 30 76 | 0016+731 10048-175549| 30 60 98 30 98 | 1053+815 10048-175823| 36 64 135 89 135 | . . . 1044+719 10048-192100| 40 40| 2141+175 10048-192130| 315 315 | 0059+581 10048-192231| 87 87| 4C39.25 10048-192236| 30 30 30 30 | 1128+385 10048-192405| 30 30 30 30 | 3C371 10048-192442| 40 40| 1324+224 10048-192529| 30 30 30 | 1418+546 10048-192605| 40 40| 2356+385 10048-192759| 104 104| 0536+145 10048-192811| 54 127 162 162 | 0014+813 10048-193032| 53 53| End of listing. =========================================================== Last observations Observation listing from file ./rd1002.skd for experiment RD1002 Source Start DURATIONS name yyddd-hhmmss Kk Mc Ny On Tc Ts Wf Wz 2000+472 10049-170259| 40 40| 2113+293 10049-170415| 200 200| 2141+175 10049-170444| 90 203 500 500 311 | 1300+580 10049-170851| 58 58| 4C39.25 10049-170958| 30 30 30 | 0716+714 10049-171030| 40 40| 1520+319 10049-171150| 78 30 78 | 1101+384 10049-171157| 117 117| 2215+150 10049-171527| 40 40| 0804+499 10049-171545| 36 83 178 168 178 | 2309+454 10049-171649| 200 200| 0133+476 10049-172038| 30 30 30 30 | 0016+731 10049-172159| 48 30 48 | 1732+389 10049-172344| 41 30 41 | 0458-020 10049-172407| 30 30 | 0606-223 10049-172542| 30 30 | 0229+131 10049-172549| 208 208 | 0657+172 10049-172723| 30 30 30 30 | 0727-115 10049-172904| 30 30 | 1324+224 10049-172910| 30 30 | End of listing. =========================================================== SKED Summary from file ./rd1002.skd for experiment RD1002 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 2.3 Min = 0.0 Max = 96.0 (Baseline Tc-Ts on 1732+389) RMS = 6.5 Total time: 1440 minutes ( 24.0 hours). Key: Kk=KOKEE Mc=MEDICINA Ny=NYALES20 On=ONSALA60 Tc=TIGO Ts=TSUKUB32 Wf=WESTFORD Wz=WETTZELL Kk Mc Ny On Tc Ts Wf Wz Avg % obs. time: 60 31 47 58 29 25 53 60 45 % cal. time: 6 4 4 4 1 4 4 6 4 % slew time: 19 45 24 25 3 14 16 11 20 % idle time: 14 19 24 12 66 56 27 22 30 total # scans: 535 382 356 336 114 323 305 535 360 # scans/hour : 22 16 15 14 5 13 13 22 15 Avg scan (sec): 97 70 114 149 216 67 151 97 119 # data tracks: 16 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 16 Total GBytes: 1869 956 1462 1799 888 774 1656 1869 1409 Total GB(M5): 1661 850 1300 1600 790 688 1472 1661 1253 # of tapes : 1.0 1.0 1.0 1.0 1.0 0.1 1.0 1.0 tape change times (hhmm): Total number of tapes: 7.1 Total GBytes (M5) recorded: 10021.2 # OF OBSERVATIONS BY BASELINE | Kk Mc Ny On Tc Ts Wf Wz StnTotal -------------------------------------------------- Kk| 0 0 0 0 0 0 535 535 Mc| 318 311 53 256 235 0 1173 Ny| 328 39 253 249 0 1187 On| 43 229 244 0 1155 Tc| 24 80 0 239 Ts| 162 0 924 Wf| 0 970 Wz| 535 Number of 2-station scans: 667 Number of 3-station scans: 33 Number of 4-station scans: 158 Number of 5-station scans: 163 Number of 6-station scans: 1 Number of 7-station scans: 0 Number of 8-station scans: 0 Total # of scans, observations: 1022 3359 ===========================================================