Session Notes for RD0807 Prepared by J. Gipson, NVI, Inc./GSFC =========================================================== PURPOSE AND GENERAL NOTES =========================================================== The purpose of this rd0807 is to vet candidate geodetic sources. The schedule uses a selection of 73 sources. 30 of them were taken from the catalog of good geodetic sources; 43 are "new" sources to be tested for adding to the geodetic source catalog. Because of media availability this sessions is scheduled in 256-R1 mode, and not the normal 512 RD mode. Kokee Park and Wettzell will join in after observing the INT. An extra 3 seconds is added at the start of each scan for correlator synchronization. These extra seconds are not included in the calculation of the scan SNR. This session must be recorded on Mk5 disks. Multiple disk modules may be required. Stations must plan for disk changes by referring to the drudg listings that display the number of Gb recorded during the experiment. =========================================================== Parameter values for experiment RD0807 Experiment description: R&D-07 2008 Scheduler: NASA Correlator: HAYSTACK Nominal start: 2008-254-18:00:00 Nominal end: 2008-255-18:00:00 Current yyyyddd: 2008254 (2008.70) ( 14720 MJD, WED. 10SEP.) Greenwich sidereal time: 17:20: 0.00 (18: 0: 0 UT) Sun's RA and DEC: 11h 17.3m 4d 35.5 =========================================================== First observations Observation listing from file ./rd0807.skd for experiment RD0807 Source Start DURATIONS name yyddd-hhmmss Kk Ny On Tc Wf Wz OJ287 08254-180000| 500 500 301 | 1656-075 08254-180921| 500 500 500 | 1124-186 08254-181841| 199 199 | 2209+236 08254-181858| 97 97 | 1606+106 08254-182253| 42 41 42 | End of listing. =========================================================== Last observations Observation listing from file ./rd0807.skd for experiment RD0807 Source Start DURATIONS name yyddd-hhmmss Kk Ny On Tc Wf Wz OQ208 08255-175601| 111 122 122 58| End of listing. Observation listing from file ./rd0807.skd for experiment RD0807 Source Start DURATIONS name yyddd-hhmmss Kk Ny On Tc Wf Wz 1418+546 08255-173449| 109 109 | 0229+131 08255-173824| 61 61 | 0749+540 08255-174047| 264 264 | 1602-115 08255-174057| 215 215 134| 1920-211 08255-174529| 30 30| OJ287 08255-174610| 232 500 500 301 | 2008-159 08255-174641| 77 77| End of listing. =========================================================== SKED Summary from file ./rd0807.skd for experiment RD0807 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 7.1 Min = 0.0 Max = 96.0 (Baseline Kk-Wf on 0405-385) RMS = 9.7 Total time: 1438 minutes ( 24.0 hours). Key: Kk=KOKEE Ny=NYALES20 On=ONSALA60 Tc=TIGO Wf=WESTFORD Wz=WETTZELL Kk Ny On Tc Wf Wz Avg % obs. time: 62 50 49 72 59 41 55 % cal. time: 3 4 5 2 3 5 4 % slew time: 11 21 27 6 14 13 16 % idle time: 24 24 18 19 23 41 25 total # scans: 219 353 422 180 295 394 310 # scans/hour : 9 15 18 8 12 16 13 Avg scan (sec): 243 121 99 347 171 90 178 # data tracks: 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 Total GBytes: 1913 1539 1511 2247 1821 1279 1719 Total GB(M5): 1700 1368 1343 1998 1619 1137 1528 # of tapes : 0.1 0.1 0.1 0.1 0.1 0.1 tape change times (hhmm): Total number of tapes: 0.4 Total GBytes (M5) recorded: 9165.5 # OF OBSERVATIONS BY BASELINE | Kk Ny On Tc Wf Wz StnTotal ---------------------------------------- Kk| 68 29 122 78 17 314 Ny| 261 3 144 222 698 On| 11 132 355 788 Tc| 87 14 237 Wf| 127 568 Wz| 735 Number of 2-station scans: 402 Number of 3-station scans: 222 Number of 4-station scans: 92 Number of 5-station scans: 5 Number of 6-station scans: 0 Total # of scans, observations: 721 1670 =========================================================== ====================================================================== DISK MODULE CHANGES ====================================================================== This session will require 1 or 2 disk modules, depending on the sizes that you have available at your station. DRUDG does not know the sizes, so it shows an ever-increasing GByte count. Please be aware that you may have to change modules during this session, and plan accordingly. There are a few of things to consider: 1) It is desriable to precondition all modules ahead of time that you will use for the session. Recording often works better if the modules have been preconditioned since their last shipment. If you don't have time to precondition all the modules that are needed, plus one or two spares, please precondition as many as you can. 2) Mark module change times. Select the modules you will use for this session, note their sizes, and then mark by hand the places in the schedule where a module change will be necessary, and which bank will need to be changed. You can use the drudg Option 5 listing for this purpose. Unfortunately it is not possible to predict the module change times exactly. For various reasons, a module can be finished at a different time, usually earlier than expected. As long as a module does not end a great deal earlier than expected, this should not cause a problem. 3) Change modules promptly. When a module is full, the FS will automatically switch to the next one and put up a notice that you should change the old one. It is good practice to change the module as soon as possible after it is called for, because then a new one is available in case the module in use should end prematurely for some reason. If you have any questions, please contact Ed Himwich (Ed.Himwich@nasa.gov).