Session Notes for rd2203 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2203 will observe a total of 64 optically-bright ICRF3 sources selected from the Gaia Data Release 2 catalog with the following criteria: (i) relatively compact VLBI structure (structure index < 3), (ii) stronger than 0.25 Jy at X and S band, (iii) not observed in any of the IVS sessions during the past 30 days (excluding the intensive sessions), (iv) observed at least 6 times since August 2014 (beginning of the Gaia operations) and with no gap longer than two years. The optical magnitude of the sources ranges from 16.0 to 20.0. The goal is to improve the overall temporal coverage of the observations by IVS of those optically-bright ICRF3 sources during the Gaia operations. The command fill is used for all stations with an offset of 10 seconds. Wettzell (Wz) and Kokee (Kk) will observe INT I22082 during the time from 1815 UT to 1945 UT. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2203 Description R&D-03/2022 Scheduler: OSO Correlator: SHAO Start: 2022-082-18:00:00 End: 2022-083-18:00:00 ---------- Scan data parameters------------------------------- VScan Y (Compute scan length) Duration 196 sec (default duration for VSCAN=N) Modscan 1 sec (scans are multiples of this) Minscan 40 sec (min scan length) Maxscan 480 sec (max scan length) Setup 9 sec (settle time) Early 0 sec (start recording) Calibration 10 sec (time before obs) Corsync 3 sec (pad scan at end) Idle 0 sec (idle after obs) Minslew 0 sec (min slew time) Fill_off 10 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 5sec (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 70columns (width of screen) CONFIRM Y (ask before adding obs) KEEP_LOG N (keep log upon exit) CONF_EQUIP N (update info from cat) DEBUG N (display debugging info) VERBOSE LEVEL 0 ---------- Informational only ------------------------------- SKED version: 2022-01-06 Schedule file: ./rd2203.skd FREQUENCY SX (default freq. code) Process ID: 68115 Printer commands: lj, ljp Current yyyyddd: 2022082 (2022.22)( 19662 MJD, WED. 23 MAR.) Greenwich sidereal time: 06:04:49 (18:00:00 UT) Sun's RA and DEC: 0h 11.3m 1d 13.6 =========================================================== First observations Observation listing from file ./rd2203.skd for experiment RD2203 Source Start DURATIONS name yyddd-hhmmss Hh Kk Km Ma Ny Ns On Wz 1044+719 22082-180000| 100 60 40 66 100 55 83| 0812+367 22082-180215| 184 40 309 326 333 307 333| 1147+245 22082-180843| 143 40 161 122 161 125 150| 1726+455 22082-181159| 53 40 79 89 89 86| 0010+405 22082-181411| 49 49| 0722+145 22082-181505| 90 152 160 203 203 197 | End of listing. =========================================================== End of listing. Last observations Observation listing from file ./rd2203.skd for experiment RD2203 Source Start DURATIONS name yyddd-hhmmss Hh Kk Km Ma Ny Ns On Wz 1236+077 22083-174633| 49 45 49 | 1101+384 22083-174946| 384 154 458 201 480 480 237| 1739+522 22083-175422| 40 40 40 40| 0014+813 22083-175600| 58 73 65 73| 1633+38 22083-175811| 99 99 40 | 0743-006 22083-175917| 33 33 33 33 33| End of listing. =========================================================== SKED Summary from file ./rd2203.skd for experiment RD2203 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 6.8 Min = 0.0 Max = 84.7 (Baseline Kk-Ns on 0722+145) RMS = 5.7 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Km=KUNMING Ma=MATERA Ny=NYALES20 Ns=NYALE13S On=ONSALA60 Wz=WETTZELL Hh Kk Km Ma Ny Ns On Wz Avg % obs. time: 29 50 43 68 68 72 73 71 59 % cal. time: 1 2 4 3 4 3 3 3 3 % slew time: 21 10 40 22 20 2 16 9 18 % idle time: 47 37 12 7 7 22 7 15 20 total # scans: 123 201 306 230 328 219 240 295 242 # scans/hour : 5 8 13 10 14 9 10 12 10 Avg scan (sec): 205 215 123 255 179 286 262 208 216 # data tracks: 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 Total TB(M5): 3.24 5.54 4.81 7.52 7.50 8.01 8.05 7.87 6.57 # OF OBSERVATIONS BY BASELINE | Hh Kk Km Ma Ny Ns On Wz Total -------------------------------------------------- Hh| 0 108 76 102 55 77 98 516 Kk| 159 122 184 131 129 167 892 Km| 188 272 167 194 245 1333 Ma| 223 193 223 208 1233 Ny| 212 231 272 1496 Ns| 206 188 1152 On| 219 1279 Wz| 1397 Number of 2-station scans: 13 Number of 3-station scans: 65 Number of 4-station scans: 53 Number of 5-station scans: 25 Number of 6-station scans: 93 Number of 7-station scans: 118 Number of 8-station scans: 0 Total number of scans: 367 Total number of obs: 4649 Total integrated obs-time: 875262 Average obs-time: 188.3 Histogram of observation durations Dur: 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 #Obs: | 656| 455| 493| 410| 391| 295| 218| 295| 230| 135| 172| 99| 62| 77| 67| 47| 48| 62| 437| Average X-band SNRs by baseline | Hh Kk Km Ma Ny Ns On Wz AVG ------------------------------------------------- Hh| - 89 66 72 55 60 110 78 Kk| 60 42 59 38 37 61 51 Km| 79 96 60 67 115 84 Ma| 84 58 77 130 80 Ny| 84 85 126 90 Ns| 57 85 65 On| 115 75 Wz| 109 Average S-band SNRs by baseline | Hh Kk Km Ma Ny Ns On Wz AVG ------------------------------------------------- Hh| - 59 34 39 21 32 52 42 Kk| 70 43 51 29 41 58 50 Km| 45 53 27 41 61 51 Ma| 34 18 32 49 36 Ny| 25 35 49 41 Ns| 18 26 23 On| 46 35 Wz| 49 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: HARTRAO KOKEE KUNMING MATERA NYALES20 NYALE13S ONSALA60 WETTZELL Mode Tot.Rate #Chan Chan.BW Tot.BW #BBC #bits Tracks*(fan) Tot.tracks Mk341:1 1024 Mbps 16 16 Mhz 256 Mhz 14 2 32*(1) 32 X-band spanned bw= 720.0 MHz rms spanned bw= 275.0 MHz S-band spanned bw= 88.0 MHz rms spanned bw= 30.9 MHz Effective number of 1-bit channels recorded per sub-pass X S Total 19.13 11.48 30.61 =========================================================== Tape types ID Station Tape length Speed Hh HARTRAO Mark5B Kk KOKEE Mark5B Km KUNMING Mark5B Ma MATERA Mark5B Ny NYALES20 Mark5B Ns NYALE13S 17650feet (Thin ) 33333 (Low ) 1 On ONSALA60 17640feet (Thin ) 56250 (HIGH ) 1 Wz WETTZELL 17640feet (Thin ) 56250 (HIGH ) 1 =========================================================== 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) Hh Kk Km Ma Ny Ns On Hh Kk Km Ma Ny Ns On Kk 20 Kk 15 Km 20 20 Km 15 15 Ma 20 20 20 Ma 15 15 15 Ny 20 20 20 20 Ny 15 15 15 15 Ns 20 20 20 20 20 Ns 15 15 15 15 15 On 20 20 20 20 20 20 On 15 15 15 15 15 15 Wz 20 20 20 20 20 20 20 Wz 15 15 15 15 15 15 15 ===========================================================