Session Notes for VO (VLBI Global Observing System-Operations) session: vo2174 Prepared by C. Thomas, NVI, Inc./GSFC =========================================================== ----- Parameter listing -------------------------------------- Experiment: VO2174 Description VGOS broadband session Scheduler: NASA Correlator: WASH Start: 2022-174-18:00:00 End: 2022-175-18:00:00 ---------- Scan data parameters------------------------------- VScan Y (Compute scan length) Duration 30 sec (default duration for VSCAN=N) Modscan 1 sec (scans are multiples of this) Minscan 30 sec (min scan length) Maxscan 30 sec (max scan length) Setup 2 sec (settle time) Early 0 sec (start recording) Calibration 4 sec (time before obs) Corsync 1 sec (pad scan at end) Idle 0 sec (idle after obs) Minslew 0 sec (min slew time) Fill_off 0 sec (fill cmd buff) Mark6_off 0 sec (buffer offset) ---------- Procedure parameters ------------------------------ PRFLAG YYNN (required procedures) PREOB PREOB (pre-ob procedure) MIDOB MIDOB (mid-ob procedure) POSTOB MIDOB (post-ob procedure) ---------- Timing parameters ------------------------------ SOURCE 1sec (SOURCE time) Tapetm 1sec (TAPE command time) ---------- General parameters ------------------------------- MODULAR 1sec (start time mark) MINIMUM 0sec (time between obs.) LOOKAHEAD 20min (for WHATSUP) SNR MAN (reject for low SNR) WIDTH 79columns (width of screen) CONFIRM Y (ask before adding obs) KEEP_LOG Y (keep log upon exit) CONF_EQUIP N (update info from cat) DEBUG N (display debugging info) VERBOSE LEVEL 0 ---------- Informational only ------------------------------- SKED version: 2022-05-12 Schedule file: ./vo2174.skd FREQUENCY SX (default freq. code) Process ID: 94806 Printer commands: lj, ljp Current yyyyddd: 2022174 (2022.48)( 19754 MJD, THUR 23 JUN.) Greenwich sidereal time: 12:07:32 (18:00:00 UT) Sun's RA and DEC: 6h 9.8m 23d 25.0 =========================================================== Important Station Information Onsala-E and Onsala-W are not scheduled for this session because it is a holiday in Sweden. =========================================================== There are no observations for Kokee and Wettzell-South from 18:15 U.T. to 19:45 U.T. Kokee and Wettzell-South will participate in an intensive session during this period. =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Gs Is K2 Mg Yj Wf Ws 0613+570 22174-180000| 30 30 30 30 30 30 30| =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Gs Is K2 Mg Yj Wf Ws 1803+784 22175-175615| 30 30 30 | 3C274 22175-175715| 30 30 30 30| 1417+385 22175-175823| 30 30 30| 0800+618 22175-175839| 30 30 30 | =========================================================== SKED Summary from file ./vo2174.skd for experiment VO2174 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 15.8 Min = 0.0 Max = 480.0 (Baseline Gs-Wf on 1213-172) RMS = 22.9 Total time: 1439 minutes ( 24.0 hours). Key: Gs=GGAO12M Is=ISHIOKA K2=KOKEE12M Mg=MACGO12M Yj=RAEGYEB Wf=WESTFORD Ws=WETTZ13S Gs Is K2 Mg Yj Wf Ws Avg % obs. time: 36 34 23 35 36 31 34 33 % cal. time: 5 4 3 5 5 4 5 4 % slew time: 40 22 13 23 15 47 21 26 % idle time: 19 39 60 36 44 17 40 37 total # scans: 1031 967 652 1003 1032 899 972 936 # scans/hour : 43 40 27 42 43 37 41 39 Avg scan (sec): 30 30 30 30 30 30 30 30 # data tracks: 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 Total TB(M5): 31.7 29.7 20.0 30.8 31.7 27.6 29.9 28.8 # OF OBSERVATIONS BY BASELINE | Gs Is K2 Mg Yj Wf Ws Total --------------------------------------------- Gs| 309 297 687 571 695 492 3051 Is| 431 454 575 272 602 2643 K2| 557 125 290 159 1859 Mg| 294 610 235 2837 Yj| 470 902 2937 Wf| 362 2699 Ws| 2752 Number of 2-station scans: 0 Number of 3-station scans: 1167 Number of 4-station scans: 468 Number of 5-station scans: 56 Number of 6-station scans: 63 Number of 7-station scans: 75 Total number of scans: 1829 Total number of obs: 9389 Total integrated obs-time: 281670 Average obs-time: 30.0 Histogram of observation durations Dur: 30 #Obs: | Average X-band SNRs by baseline | Gs Is K2 Mg Yj Wf Ws AVG -------------------------------------------- Gs| 47 48 62 60 71 59 60 Is| 69 54 57 55 67 59 K2| 57 54 52 60 58 Mg| 61 70 60 61 Yj| 77 100 74 Wf| 79 69 Ws| 77 Average S-band SNRs by baseline | Gs Is K2 Mg Yj Wf Ws AVG -------------------------------------------- Gs| 34 34 42 40 44 47 42 Is| 46 37 40 32 54 42 K2| 37 35 31 45 38 Mg| 37 40 44 39 Yj| 42 76 51 Wf| 51 41 Ws| 58 =========================================================== Recording mode Name Code GEOSX SX Recording mode for: GGAO12M ISHIOKA KOKEE12M RAEGYEB WESTFORD WETTZ13S Mode Tot.Rate #Chan Chan.BW Tot.BW #BBC #bits Tracks*(fan) Tot.tracks Mk341:1 256 Mbps 16 8 Mhz 128 Mhz 14 1 16*(1) 16 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 1-bit channels recorded per sub-pass X S Total 10.00 6.00 16.00 Recording mode for: MACGO12M Mode Tot.Rate #Chan Chan.BW Tot.BW #BBC #bits Tracks*(fan) Tot.tracks Mk341:2 256 Mbps 16 8 Mhz 128 Mhz 14 1 16*(2) 32 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 1-bit channels recorded per sub-pass X S Total 10.00 6.00 16.00 =========================================================== Minor Options BegScan Rel 1.00 EndScan Rel 1.00 StatWt Abs 1.00 =========================================================== Major Options Subnet GsIsK2MgYjWfWs SkyCov Yes AllBlGood Yes MaxAngle 180.00 MinAngle 30.00 MinBetween 20 MinSunDist 15.00 MaxSlewTime 300 TimeWindow 24.00 MinSubNetSize 3 NumSubNet 2 Best 60 FillIn Yes FillMinSub 3 FillMinTime 120 FillBest 80 Add_ps 5.0 El_noise 0.0 SNRWts Yes SplitTwins No =========================================================== Weighted Station 1 GGAO12M 2.00 2 ISHIOKA 3.00 4 MACGO12M 1.00 5 RAEGYEB 1.00 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 0) S-band (margin 0) X-band (ast_margin 0) S-band (ast_margin 0) Gs Is K2 Mg Yj Wf Gs Is K2 Mg Yj Wf Is 15 Is 15 K2 15 15 K2 15 15 Mg 15 15 15 Mg 15 15 15 Yj 15 15 15 15 Yj 15 15 15 15 Wf 15 15 15 15 15 Wf 15 15 15 15 15 Ws 15 15 15 15 15 15 Ws 15 15 15 15 15 15