Session Notes for RD0805 Prepared by D. Behrend, NVI, Inc./GSFC =========================================================== PURPOSE AND GENERAL NOTES =========================================================== The rd0805 is the second of two or more R&D sessions dedicated to the observation of high redshift radio sources (z>1). This schedule uses the frequency setting of the R1 sessions (256 Mbps) and the same SNR values. All stations are fully scheduled. HartRAO and TIGO have been given extra weight. The best 60 sources have been selected from a source list that is based on 515 not unstable sources with high redshift (z>1) reduced by the 60 sources that were used in rd0801 (the first high redshift session). The maximum scanlength parameter was inreased to 400 sec (a value of 200 sec resulted in 1 scan with TIGO only). The "high redshift" R&Ds were proposed by O. Titov (Geoscience Australia) with the goals of increasing the positional accuracy of high redshift radio sources for a more precise estimation of the Hubble constant anisotropy and of reducing the effect of radio source structure on the accuracy of the EOP estimates. Kokee and Wettzell will observe INT I08177 and join rd0805 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 RD0805 Experiment description: R&D-05 2008 Scheduler: NASA Correlator: HAYSTACK Nominal start: 2008-177-18:00:00 Nominal end: 2008-178-18:00:00 Current yyyyddd: 2008177 (2008.49) ( 14643 MJD, WED. 25JUN.) Greenwich sidereal time: 12:16:58.00 (18: 0: 0 UT) Sun's RA and DEC: 6h 19.7m 23d 21.6 =========================================================== First observations Observation listing from file ./rd0805.skd for experiment RD0805 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc Ny Tc Wf Wz 1128+385 08177-180000| 136 40 136 66 | 0642+449 08177-180320| 41 173 173 102 | ...... 0151+474 08177-195314| 297 400 400| 1406-076 08177-195537| 45 45 | ...... End of listing. =========================================================== Last observations Observation listing from file ./rd0805.skd for experiment RD0805 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc Ny Tc Wf Wz ...... 0357-263 08178-175152| 400 400 | 1128+385 08178-175303| 137 40 137 66 40| 1039+811 08178-175634| 40 146 146 74| End of listing. =========================================================== SKED Summary from file ./rd0805.skd for experiment RD0805 (all scans with at least one subnet station) 4 chars/hour SOURCE | 0 3 6 9 12 15 18 21 | #SCANS #OBS #Obs/bl 0005-239| x x x x x x x x x | 9 18 7.5 0016+731| x x x x | 4 40 4.0 0027+056| x x x x x x x x x x | 10 22 3.2 0113-283| x x x x x x x x x x | 10 20 9.2 0123+257| x x x x x x x x x x x x x | 13 36 4.3 0151+474| x x x x x x x | 7 22 2.2 0202-172| x x x x x x x | 7 18 6.1 0246+061| x x x x x x x x x x x | 11 27 4.0 0326+278| x x x x x x x x x x x | 11 30 3.1 0357-263| x x x x x x x x | 8 19 9.8 NRAO150 | x x x x x x x x x x x x x x x x x x x | 19 21 2.1 0420+022| x x x x x x x x x | 9 25 4.1 0425+174| x x x x x x x x | 8 29 3.3 0529+075| x x x x x x x x x | 9 21 2.9 0535+677| x x x x x x x x x | 9 22 2.4 0601-172| x x x x x x x x | 8 19 6.5 0642+449| x x x x x x x x x x x x x x x x x x x | 19 50 7.5 0747+185| x x x x x x x x x x x x| 12 46 5.4 0805-077| x x x x x x x x x x | 10 30 8.2 0850+581| x x x x x x x x| 8 39 4.4 0858-279|x x x x x x x x x | 9 17 5.9 0902+343| x x x x x x x x x x x | 11 37 4.4 0907+022| x x x x x x x x x | 9 34 6.6 1013+208| x x x x x x x x x x x x | 12 33 4.7 1021-006| x x x x x x x x x | 9 24 6.4 1027-186| x x x x x x x x x x| 10 16 4.8 1039+811| x x x x x x x x x x x xx x x x | 16 52 5.2 1124+571| x x x x x x x x x x | 10 30 3.6 1128+385| x x x x x x x x x x x x x xx x x x x | 19 51 5.7 1142+052| x x x x x x x x x | 9 13 2.0 1206-238| x x x x x x x x x x x | 11 17 5.5 1210+197|x x x x x x x x x x x x x | 13 34 4.3 1317+019| x x x x x x x | 7 16 3.2 1331+170| x x x x x x x x x x x x | 12 31 4.3 1335+552| x x x x x x x x| 8 24 2.9 1336-260| x x x x x x x x x | 9 14 8.2 1406-076| x x x x x x x x x x | 10 31 9.1 1424+366| x x x x x x x x x x | 10 31 3.5 1519-294| x x x x x x x x x x | 10 12 5.5 1526+670| x x x x x x | 6 35 3.8 1532+016| x x x x x x x x x x x | 11 31 5.5 1608+243| x x x x x x x x | 8 30 3.3 1619+491| x x x x x | 5 16 1.9 1753+204| x x x x x x x x x | 9 20 3.2 1755+578| x x x x x x x | 7 16 1.8 1801+010| x x x x x x x x x x | 10 17 3.5 1812+412| x x x x x x x x x | 9 23 2.6 1908-201| x x x x x x x x | 8 14 7.0 1936+714| x x x x x x x x x | 9 34 3.5 2005+403|x x x x x x x x x x x x | 12 39 4.1 2022+031|x x x x x x x x x x x | 11 24 4.2 2044-168| x x x x x x x x x x| 10 14 4.6 2052-474| x x x x x x x x x| 9 9 16.3 2136+141|x x x x x x x x x x x x x x x | 15 46 5.4 2159+505| x x x x x x x x x | 9 47 5.8 2229-172|x x x x x x x x x x | 10 24 7.7 2259+058| x x x x x x x x x x x x x | 13 28 12.3 2314-340| x x x x x x x x x x | 10 12 6.8 2338+191| x x x x x x x x x x x x x | 13 27 3.2 2344+429| x x x x x x x x | 8 27 4.0 Total scans, obs: 607 1604 4 chars/hour STATN | 0 3 6 9 12 15 18 21 | #SCANS #OBS %OBS HARTRAO |xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx| 209 420 26.2 KOKEE |xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxx| 213 315 19.6 MEDICINA|xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx| 364 751 46.8 NYALES20|xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx| 225 513 32.0 TIGOCONC|xxxxxxxxxxxxxxxx xxxxxxxx xxxxx xxx xxx xxxxxxxxxxxxxxxxxx xxxxxxxxxxxxx xxxxxxxx xxxx xxxx| 115 123 7.7 WESTFORD|xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx| 227 452 28.2 WETTZELL|xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxx| 266 634 39.5 Average number of obs. per baseline per source(normalized by up-time) = 4.9 Min = .0 Max = 84.7 (Baseline Kk-Wz on 2259+058) RMS = 6.3 Total time: 1437 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Mc=MEDICINA Ny=NYALES20 Tc=TIGO Wf=WESTFORD Wz=WETTZELL Hh Kk Mc Ny Tc Wf Wz Avg % obs. time: 45 71 35 70 51 59 54 55 % cal. time: 2 2 4 3 1 3 3 3 % slew time: 34 11 36 12 3 10 8 17 % idle time: 17 15 23 15 44 28 34 26 total # scans: 209 213 364 225 115 227 266 231 # scans/hour : 9 9 15 9 5 9 11 10 Avg scan (sec): 187 285 83 268 381 223 174 228 # data tracks: 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 Total GBytes: 1404 2189 1090 2172 1576 1821 1671 1703 Total GB(M5): 1248 1945 969 1931 1401 1619 1485 1514 # of tapes : .1 .1 .1 .1 .1 .1 .1 tape change times (hhmm): Total number of tapes: .5 Total GBytes (M5) recorded: 10597.9 # OF OBSERVATIONS BY BASELINE | Hh Kk Mc Ny Tc Wf Wz StnTotal --------------------------------------------- Hh| 0 181 57 5 53 124 420 Kk| 42 67 103 67 36 315 Mc| 146 4 127 251 751 Ny| 3 109 131 513 Tc| 6 2 123 Wf| 90 452 Wz| 634 Number of 2-station scans: 352 Number of 3-station scans: 142 Number of 4-station scans: 76 Number of 5-station scans: 37 Number of 6-station scans: 0 Number of 7-station scans: 0 Total # of scans, observations: 607 1604 =========================================================== Recording mode Name Code GEOSX SX Recording mode setup for: HARTRAO KOKEE MEDICINA 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 .01 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 10.000 6.000 16.000 =========================================================== Tape types ID Station Tape length Density Passes Hh HARTRAO Mark5A Kk KOKEE Mark5A Mc MEDICINA Mark5A Ny NYALES20 Mark5A Tc TIGOCONC 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) Hh Kk Mc Ny Tc Wf Hh Kk Mc Ny Tc Wf Kk 20 Kk 15 Mc 20 20 Mc 15 15 Ny 20 20 20 Ny 15 15 15 Tc 15 15 15 15 Tc 12 12 12 12 Wf 20 20 20 20 15 Wf 15 15 15 15 12 Wz 20 20 20 20 15 20 Wz 15 15 15 15 12 15 ====================================================================== 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).