Session Notes for CN (Concurrent with Rapid Turnaround Monday) session: cn1894 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: CN1894 Description 2GBPS CONCURRENT WITH IVS-R1 SESSION Scheduler: NASA Correlator: VLBA Start: 2019-133-17:00:00 End: 2019-134-17:00:00 Current yyyyddd: 2019133 (2019.36) ( 18617 MJD, MON. 13MAY.) Greenwich sidereal time: 08:24:39 (17:00:00 UT) Sun's RA and DEC: 3h 21.0m 18d 26.0 =========================================================== Important Station Information St. Croix will not participate in this session. St. Croix went down on April 22, 2019 for 3.5 months for corrosion mitigation and painting. =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Br Fd Hn Kp La Mk Nl Ov Pt 2000+472 19133-170000| 31 22 20 26 24 32 20 32 25| =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Br Fd Hn Kp La Mk Nl Ov Pt 1357+769 19134-165808| 107 107 107 107 107 107 107 107 107| =========================================================== SKED Summary from file ./cn1894.skd for experiment CN1894 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 13.8 Min = 0.0 Max = 52.8 (Baseline Hn-Mk on 1519-294) RMS = 8.1 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 Br Fd Hn Kp La Mk Nl Ov Pt Avg % obs. time: 34 33 38 33 33 34 37 34 33 34 % cal. time: 6 6 6 6 6 6 6 6 6 6 % slew time: 52 53 46 54 53 44 50 53 53 52 % idle time: 7 6 10 6 6 15 6 6 6 8 total # scans: 530 529 516 530 530 485 530 530 530 523 # scans/hour : 22 22 22 22 22 20 22 22 22 22 Avg scan (sec): 56 54 63 54 55 60 60 55 54 56 # data tracks: 32 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 32 Total TB(M5): 7.56 7.31 8.33 7.30 7.40 7.43 8.09 7.52 7.37 7.59 # OF OBSERVATIONS BY BASELINE | Br Fd Hn Kp La Mk Nl Ov Pt Total ------------------------------------------------------- Br| 529 516 530 530 485 530 530 530 4180 Fd| 515 529 529 484 529 529 529 4173 Hn| 516 516 472 516 516 516 4083 Kp| 530 485 530 530 530 4180 La| 485 530 530 530 4180 Mk| 485 485 485 3866 Nl| 530 530 4180 Ov| 530 4180 Pt| 4180 Number of 2-station scans: 0 Number of 3-station scans: 0 Number of 4-station scans: 0 Number of 5-station scans: 0 Number of 6-station scans: 0 Number of 7-station scans: 1 Number of 8-station scans: 58 Number of 9-station scans: 471 Total number of scans: 530 Total number of obs: 18601 Total integrated obs-time: 883407 Average obs-time: 47.5 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: | 7505| 5199| 3031| 1321| 496| 360| 278| 197| 104| 79| 31| 0| 0| 0| 0| 0| 0| 0| 0| 0| Average S-band SNRs by baseline | Br Fd Hn Kp La Mk Nl Ov Pt AVG ------------------------------------------------------ Br| 90 84 93 93 82 92 97 93 91 Fd| 85 100 101 74 94 94 102 93 Hn| 82 86 70 101 82 84 85 Kp| 101 78 92 100 103 94 La| 76 96 97 104 95 Mk| 75 82 76 77 Nl| 90 94 92 Ov| 99 93 Pt| 95 Average X-band SNRs by baseline | Br Fd Hn Kp La Mk Nl Ov Pt AVG ------------------------------------------------------ Br| 192 175 199 204 161 199 212 201 193 Fd| 177 216 223 150 203 204 221 199 Hn| 170 185 125 216 168 177 175 Kp| 222 160 197 218 223 201 La| 155 212 215 230 206 Mk| 140 168 156 152 Nl| 195 205 196 Ov| 216 200 Pt| 204 =========================================================== 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 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= 160.0 MHz rms spanned bw= 59.9 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 0524-237 1.00 1.50 0.34 64 2 1409+218 1.00 1.50 1.31 244 7 1055+201 1.00 1.50 0.77 144 4 1336-260 1.00 1.50 0.77 144 4 2207+374 1.00 1.50 1.61 300 9 1555-140 1.00 1.50 1.16 216 6 1745+670 1.00 1.50 1.46 272 8 0121+560 1.00 1.50 1.53 284 9 1743+173 1.00 1.50 0.19 36 1 0002-478 1.00 1.50 0.00 0 0 2254+024 1.00 1.50 1.12 208 6 0805+046 1.00 1.50 0.77 144 4 1014+615 1.00 1.50 0.88 164 5 0306+102 1.00 1.50 0.58 108 3 1027-186 1.00 1.50 0.19 36 1 Total 12.71 2364 69 =========================================================== 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 BrFdHnKpLaMkNlOvPt 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 =========================================================== 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 Br Fd Hn Kp La Mk Nl Ov 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