Session Notes for CN (Concurrent with Rapid Turnaround Monday) session: cn1888 Prepared by C. Thomas, NVI, Inc./GSFC The CN sessions run concurrent with the even R1 session only. The data rate is 2Gbps and the network consists of the 10 VLBA stations. There are six sessions scheduled during 2019. The plan is to add non-VLBA stations to the network. =========================================================== ----- Parameter listing -------------------------------------- Experiment: CN1888 Description 2GBPS CONCURRENT WITH IVS-R1 SESSION Scheduler: NASA Correlator: VLBA Start: 2019-091-17:00:00 End: 2019-092-17:00:00 Current yyyyddd: 2019091 (2019.25) ( 18575 MJD, MON. 1APR.) Greenwich sidereal time: 05:39:03 (17:00:00 UT) Sun's RA and DEC: 0h 43.0m 4d 37.1 =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Br Fd Hn Kp La Mk Nl Ov Pt Sc 2126-158 19091-170000| 27 26 30 28 28 30 29 21 28 20| =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Br Fd Hn Kp La Mk Nl Ov Pt Sc 2357-318 19092-165744| 29 21 29 29 30 30 30 29 20| 0115-214 19092-165849| 66 66 66 66 66 66 66 66 66| =========================================================== SKED Summary from file ./cn1888.skd for experiment CN1888 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 19.3 Min = 0.0 Max = 46.5 (Baseline Br-Hn on 1519-273) RMS = 7.5 Total time: 1440 minutes ( 24.0 hours). Key: Br=BR-VLBA Fd=FD-VLBA Hn=HN-VLBA Kp=KP-VLBA La=LA-VLBA Mk=MK-VLBA Nl=NL-VLBA Ov=OV-VLBA Pt=PIETOWN Sc=SC-VLBA Br Fd Hn Kp La Mk Nl Ov Pt Sc Avg % obs. time: 37 38 37 38 38 29 38 36 39 33 36 % cal. time: 9 10 10 10 10 6 10 9 10 9 9 % slew time: 40 41 42 41 40 30 41 41 41 40 40 % idle time: 12 10 10 10 11 33 10 13 10 17 14 total # scans: 807 851 873 835 850 558 874 799 848 776 807 # scans/hour : 34 35 36 35 35 23 36 33 35 32 34 Avg scan (sec): 40 39 36 39 39 46 37 39 39 37 38 # data tracks: 32 32 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 32 32 Total TB(M5): 8.21 8.46 8.08 8.35 8.43 6.52 8.33 7.96 8.53 7.29 8.02 # OF OBSERVATIONS BY BASELINE | Br Fd Hn Kp La Mk Nl Ov Pt Sc Total ------------------------------------------------------------ Br| 708 724 700 723 508 727 722 717 625 6154 Fd| 777 802 827 481 777 706 836 702 6616 Hn| 738 794 450 871 666 777 771 6568 Kp| 786 505 739 737 802 661 6470 La| 465 795 708 832 713 6643 Mk| 451 543 478 381 4262 Nl| 669 778 769 6576 Ov| 711 582 6044 Pt| 699 6630 Sc| 5903 Number of 2-station scans: 0 Number of 3-station scans: 142 Number of 4-station scans: 40 Number of 5-station scans: 31 Number of 6-station scans: 45 Number of 7-station scans: 76 Number of 8-station scans: 74 Number of 9-station scans: 244 Number of 10-station scans: 374 Total number of scans: 1026 Total number of obs: 30933 Total integrated obs-time: 1022720 Average obs-time: 33.1 Histogram of observation durations Dur: 0 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 #Obs: |15039|11672| 3070| 760| 189| 111| 54| 11| 10| 13| 4| 0| 0| 0| 0| 0| 0| 0| 0| 0| Average S-band SNRs by baseline | Br Fd Hn Kp La Mk Nl Ov Pt Sc AVG ----------------------------------------------------------- Br| 83 75 86 88 81 82 94 88 68 83 Fd| 78 106 105 75 85 99 107 77 92 Hn| 76 79 62 85 76 78 82 78 Kp| 107 79 84 106 110 73 93 La| 75 87 103 108 75 93 Mk| 69 82 78 60 74 Nl| 84 86 78 83 Ov| 105 71 92 Pt| 74 94 Sc| 74 Average X-band SNRs by baseline | Br Fd Hn Kp La Mk Nl Ov Pt Sc AVG ----------------------------------------------------------- Br| 188 163 199 200 174 180 212 199 148 186 Fd| 174 254 253 160 194 235 256 172 213 Hn| 165 182 127 195 162 174 183 172 Kp| 258 171 188 250 266 162 216 La| 160 204 246 262 172 219 Mk| 143 176 168 125 158 Nl| 183 196 174 186 Ov| 247 155 210 Pt| 167 219 Sc| 165 =========================================================== Recording mode Name Code 2GB-VLBA SX Recording mode for: BR-VLBA FD-VLBA HN-VLBA KP-VLBA LA-VLBA MK-VLBA NL-VLBA OV-VLBA PIETOWN SC-VLBA Mode Tot.Rate Tot.BandW #BBC #bits Barrel VLBA1:1 2048 Mbits 512 MHz 16 2 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 32.00 MHz 1 32(*1) 32 S-band spanned bw= 128.0 MHz rms spanned bw= 47.3 MHz X-band spanned bw= 448.0 MHz rms spanned bw= 149.5 MHz Effective number of 1-bit channels recorded per sub-pass S X Total 7.65 22.95 30.61 =========================================================== Monitoring Sources Source Min Max Actual #Num #Scans 1021-006 1.00 1.50 0.97 300 8 1416+067 1.00 1.50 1.19 367 11 1659+399 1.00 1.50 1.53 472 15 1404-342 1.00 1.50 0.45 140 7 1317+520 1.00 1.50 1.41 437 18 2056-369 1.00 1.50 0.22 67 4 2207+356 1.00 1.50 1.48 457 14 0601-172 1.00 1.50 0.59 184 6 2335-181 1.00 1.50 0.78 240 11 0423+233 1.00 1.50 0.71 219 9 0636+680 1.00 1.50 1.56 482 16 0206+136 1.00 1.50 0.74 229 8 0745+241 1.00 1.50 0.94 292 12 0227-369 1.00 1.50 0.24 74 6 1616+063 1.00 1.50 1.29 400 15 Total 14.09 4360 160 =========================================================== Minor Options Astro Abs 1.50 BegScan Abs 1.00 EndScan Rel 1.00 NumObs Rel 1.00 SrcEvn Abs 1.00 SQRT StatIdle Abs 4.00 StatWt Abs 1.00 =========================================================== Major Options Subnet BrFdHnKpLaMkNlOvPtSc SkyCov Yes AllBlGood No MaxAngle 120.00 MinAngle 5.00 MinBetween 20 MinSunDist 5.00 MaxSlewTime 200 TimeWindow 4.00 MinSubNetSize 3 NumSubNet 1 Best 60 FillIn Yes FillMinSub 2 FillMinTime 90 FillBest 80 Add_ps 30.0 SNRWts Yes SplitTwins No =========================================================== Weighted Station 3 HN-VLBA 3.00 =========================================================== Tape types ID Station Tape length Density Passes Br BR-VLBA Mark5A Fd FD-VLBA Mark5A Hn HN-VLBA Mark5A Kp KP-VLBA Mark5A La LA-VLBA Mark5A Mk MK-VLBA Mark5A Nl NL-VLBA Mark5A Ov OV-VLBA Mark5A Pt PIETOWN Mark5A Sc SC-VLBA Mark5A =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans S-band (margin 0) X-band (margin 0) S-band (ast_margin 0) X-band (ast_margin 0) Br Fd Hn Kp La Mk Nl Ov Pt Br Fd Hn Kp La Mk Nl Ov Pt Fd 20 Fd 25 Hn 20 20 Hn 25 25 Kp 20 20 20 Kp 25 25 25 La 20 20 20 20 La 25 25 25 25 Mk 20 20 20 20 20 Mk 25 25 25 25 25 Nl 20 20 20 20 20 20 Nl 25 25 25 25 25 25 Ov 20 20 20 20 20 20 20 Ov 25 25 25 25 25 25 25 Pt 20 20 20 20 20 20 20 20 Pt 25 25 25 25 25 25 25 25 Sc 20 20 20 20 20 20 20 20 20 Sc 25 25 25 25 25 25 25 25 25