Session Notes for RD0803 Prepared by D. Behrend, NVI, Inc./GSFC =========================================================== PURPOSE AND GENERAL NOTES =========================================================== NOTE: This is an updated version of the intial schedule with Medicina tagged along to the original scans. No further changes were made. The purpose of rd0803 is to test 512 Mbps recording mode for possible usage in CONT08. NOTE: this schedule uses a new 512 Mbps frequency setting with 32 tracks (instead of the 64 tracks being used in the previous 512 tests). This frequency setup uses 2-bit sampling with no fanout. The schedule was generated using SNRs of 40 at X-band and 30 at S-band for all stations but TIGO. TIGO has SNRs of 20 at X and 15 at S in order to increase their number of observations. TIGO has a weight factor of 5. Ny-Alesund will observe with a hot receiver; Ny's SEFD values have been tripled for X (2700) and doubled for S (2400). All stations have been fully scheduled. The schedule uses a selection of 95 sources. 30 of them were taken from the catalog of good geodetic sources; 65 are "new" sources to be tested for adding to the geodetic source catalog. Kokee Park and Wettzell will observe INT I08100 and join rd0803 at about 1950 UT. 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 RD0803 Experiment description: R&D-03 2008 Scheduler: dbb Correlator: HAYSTACK Nominal start: 2008-100-18:00:00 Nominal end: 2008-101-18:00:00 Current yyyyddd: 2008100 (2008.27) ( 14566 MJD, WED. 9APR.) Greenwich sidereal time: 7:13:23.00 (18: 0: 0 UT) Sun's RA and DEC: 1h 14.8m 7d 54.8 =========================================================== First observations Observation listing from file ./rd0803.skd for experiment RD0803 Source Start DURATIONS name yyddd-hhmmss Kk Mc Ny Sv Tc Ts Wf Wz 0059+581 08100-180000| 40 40 40 40 40 | 2121+053 08100-180133| 40 40 40 | ...... 0648-165 08100-195119| 54 53 54| 1013+054 08100-195251| 61 128 69 128| 2227-088 08100-195333| 41 41 40 | End of listing. =========================================================== Last observations Observation listing from file ./rd0803.skd for experiment RD0803 Source Start DURATIONS name yyddd-hhmmss Kk Mc Ny Sv Tc Ts Wf Wz ...... 0454-234 08101-174520| 40 85 69 85| ...... OQ208 08101-175417| 60 99 40 99 99| 1923+210 08101-175721| 41 55 55 | End of listing. =========================================================== SKED Summary from file ./rd0803.skd for experiment RD0803 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 4.6 Min = .0 Max = 80.0 (Baseline Kk-Wf on 1144-379) RMS = 7.3 Total time: 1438 minutes ( 24.0 hours). Key: Kk=KOKEE Mc=MEDICINA Ny=NYALES20 Sv=SVETLOE Tc=TIGO Ts=TSUKUB32 Wf=WESTFORD Wz=WETTZELL Kk Mc Ny Sv Tc Ts Wf Wz Avg % obs. time: 36 25 33 35 25 32 38 39 33 % cal. time: 3 3 3 4 2 4 3 3 3 % slew time: 16 27 12 45 5 16 11 9 18 % idle time: 43 44 51 16 67 48 47 47 46 total # scans: 298 261 225 331 157 342 249 276 267 # scans/hour : 12 11 9 14 7 14 10 12 11 Avg scan (sec): 105 83 127 90 136 80 131 123 109 # data tracks: 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 Total GBytes: 2243 1557 2065 2144 1538 1978 2352 2453 2041 Total GB(M5): 1993 1384 1836 1905 1367 1758 2090 2180 1814 # of tapes : .1 .1 .1 .1 .1 .1 .1 .1 tape change times (hhmm): Total number of tapes: 1.1 Total GBytes (M5) recorded: 14514.2 # OF OBSERVATIONS BY BASELINE | Kk Mc Ny Sv Tc Ts Wf Wz StnTotal -------------------------------------------------- Kk| 56 57 96 95 210 138 56 708 Mc| 150 242 48 131 108 210 945 Ny| 180 19 122 93 144 765 Sv| 43 197 111 225 1094 Tc| 25 126 71 427 Ts| 84 109 878 Wf| 131 791 Wz| 946 Number of 2-station scans: 76 Number of 3-station scans: 214 Number of 4-station scans: 178 Number of 5-station scans: 66 Number of 6-station scans: 26 Number of 7-station scans: 21 Number of 8-station scans: 0 Total # of scans, observations: 581 3277 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode setup for: KOKEE MEDICINA NYALES20 SVETLOE TIGOCONC TSUKUB32 WESTFORD 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 32(*1) 32 .02 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 Kk KOKEE Mark5A Mc MEDICINA Mark5A Ny NYALES20 Mark5A Sv SVETLOE Mark5A Tc TIGOCONC Mark5A Ts TSUKUB32 Mark5A Wf WESTFORD Mark5A Wz WETTZELL Mark5A =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 5) S-band (margin 3) Mc 40 Mc 30 Ny 40 40 Ny 30 30 Sv 40 40 40 Sv 30 30 30 Tc 20 20 20 20 Tc 15 15 15 15 Ts 40 40 40 40 20 Ts 30 30 30 30 15 Wf 40 40 40 40 20 40 Wf 30 30 30 30 15 30 Wz 40 40 40 40 20 40 40 Wz 30 30 30 30 15 30 30 ====================================================================== 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).