Session Notes for RD1302 Prepared by K. Le Bail, NVI, Inc./GSFC =========================================================== PURPOSE AND GENERAL NOTES =========================================================== Vetting of sources for the good geodetic catalog Good geodetic sources are scarce. In 2011, 39 of them were removed because of time variability of their position (Special Handling Sources). As for now, there are 266 sources in source.cat.geodetic.good. To select a set of additional geodetic sources, we use Jing Sun's approach described in her PhD thesis. Our criteria are as follows, slightly modified from Sun's: - The structure index SI is less than or equal to 2.5 (IERS technical note no 35, Table 1, 701 sources); - The X-band flux of the sources is greater than 0.25 Jy (flux.cat, 658 sources). We obtain a set of 152 sources. 105 are in our initial list of good geodetic sources, 47 are not. We are interested in these 47 sources which are not in our geodetic catalog. The goal is two-fold. First we want to verify that we can actually observe these sources. Second we want to get accurate flux models for the sources. Assuming that we successfully detect these sources we will add them to the geodetic catalog. In this R&D session network configuration, we schedule 29 sources. 18 of the remaining sources in our list are not efficiently visible with this network configuration. We use a 512 Mbps recording mode. Kokee and Wettzell will observe INT I13099 during the time from 1815 UT to 1945 UT. ----- Parameter listing -------------------------------------- Experiment: RD1302 Description R&D-02/2013 Scheduler: NASA Correlator: HAYS Start: 2013-099-17:30:00 End: 2013-100-17:30:00 Current yyyyddd: 2013099 (2013.27) ( 16392 MJD, TUES 9APR.) Greenwich sidereal time: 6:42: 0.00 (17:30: 0 UT) Sun's RA and DEC: 1h 14.0m 7d 49.6 =========================================================== First observations Observation listing from file ./RD1302.skd for experiment RD1302 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc Ny On Tc Ts Wz 0202+319 13099-173000| 77 111 106 185 185 83| 1144+402 13099-173507| 48 48 52 52 40 40| End of listing. =========================================================== Last observations Observation listing from file ./RD1302.skd for experiment RD1302 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc Ny On Tc Ts Wz 2234+282 13100-172234| 360 360 158 | 0657+172 13100-172345| 40 40 40 40 40| 0642+449 13100-172624| 40 40 40 40| 1213-172 13100-172841| 40 40 | 0322+222 13100-172854| 56 48 56 40| End of listing. =========================================================== SKED Summary from file ./RD1302.skd for experiment RD1302 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 5.7 Min = 0.0 Max = 63.5 (Baseline Tc-Ts on 1741-038) RMS = 9.0 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Mc=MEDICINA Ny=NYALES20 On=ONSALA60 Tc=TIGO Ts=TSUKUB32 Wz=WETTZELL Hh Kk Mc Ny On Tc Ts Wz Avg % obs. time: 35 34 33 34 39 52 23 25 34 % cal. time: 3 3 4 5 4 3 5 4 4 % slew time: 54 17 42 24 26 5 19 12 25 % idle time: 7 45 19 36 30 39 53 58 36 total # scans: 231 292 359 396 354 252 393 365 330 # scans/hour : 10 12 15 17 15 11 16 15 14 Avg scan (sec): 133 100 80 75 94 180 50 59 95 # data tracks: 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 Total GBytes: 2208 2094 2081 2136 2406 3261 1410 1540 2142 Total GB(M5): 1962 1861 1850 1899 2138 2898 1253 1369 1904 # of tapes : 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 8.0 Total GBytes (M5) recorded: 15230.7 # OF OBSERVATIONS BY BASELINE | Hh Kk Mc Ny On Tc Ts Wz StnTotal -------------------------------------------------- Hh| 0 99 53 82 116 81 86 517 Kk| 86 173 106 120 178 100 763 Mc| 283 317 43 217 333 1378 Ny| 291 42 281 294 1417 On| 33 229 324 1382 Tc| 30 34 418 Ts| 231 1247 Wz| 1402 Number of 2-station scans: 245 Number of 3-station scans: 126 Number of 4-station scans: 109 Number of 5-station scans: 144 Number of 6-station scans: 103 Number of 7-station scans: 0 Number of 8-station scans: 0 Total # of scans, observations: 727 4262 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode setup for: HARTRAO KOKEE MEDICINA NYALES20 ONSALA60 TIGOCONC TSUKUB32 WETTZELL Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 506.368 Mbits 253.184 MHz 14 2 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 8.00 MHz 1 16(*2) 32 0.00 X-band spanned bw= 720.0 MHz rms spanned bw= 280.4 MHz S-band spanned bw= 140.0 MHz rms spanned bw= 50.9 MHz Effective number of channels recorded per sub-pass X S Total 19.780 11.868 31.648 =========================================================== Tape types ID Station Tape length Density Passes Hh HARTRAO Mark5B Kk KOKEE Mark5B Mc MEDICINA Mark5A Ny NYALES20 Mark5B On ONSALA60 Mark5A Tc TIGOCONC Mark5B Ts TSUKUB32 K5 Wz WETTZELL Mark5A =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 0) S-band (margin 0) Hh Kk Mc Ny On Tc Ts Hh Kk Mc Ny On Tc Ts Kk 20 Kk 15 Mc 20 20 Mc 15 15 Ny 20 20 20 Ny 15 15 15 On 20 20 20 20 On 15 15 15 15 Tc 15 15 15 15 15 Tc 12 12 12 12 12 Ts 20 20 20 20 20 15 Ts 15 15 15 15 15 12 Wz 20 20 20 20 20 15 20 Wz 15 15 15 15 15 12 15 ===========================================================