Session Notes for rd2107
Prepared by K. Le Bail, GEO / Chalmers - Onsala, Sweden
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PURPOSE AND GENERAL NOTES
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GAIA proposal
The session RD2107 will observe a total of 63 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 with an offset of 10 seconds.
Wettzell and Kokee will observe INT I21265 during the time from 1815 UT
to 1945 UT.
Nyale13s (Ns), Ny-Alesund (Ny), Ishioka (Is), and Wettzell (Wz) are
tagged along.
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----- Parameter listing --------------------------------------
Experiment: RD2107 Description R&D-09/2021
Scheduler: OSO Correlator: SHAO
Start: 2021-265-14:00:00 End: 2021-266-14:00:00
Current yyyyddd: 2021265 (2021.73) ( 19480 MJD, WED. 22SEP.)
Greenwich sidereal time: 14:06:37 (14:00:00 UT)
Sun's RA and DEC: 11h 59.2m 0d 5.1
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First observations
Observation listing from file ./rd2107.skd for experiment RD2107
Source Start DURATIONS
name yyddd-hhmmss Hh Kk Ma On Sh Wz Ns Ny Is
1849+670 21265-140000| 90 40 51 48 77 90 63 79|
1633+38 21265-140205| 278 40 67 40 100 132 70 278|
0814+425 21265-140455| 400 90 147 448 448 144 |
1725+123 21265-140904| 182 155 182 78 181 166|
2234+282 21265-141318| 290 74 110 136 137 323 292 323|
1511-100 21265-141634| 111 40 81 111 |
End of listing.
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Last observations
Observation listing from file ./rd2107.skd for experiment RD2107
Source Start DURATIONS
name yyddd-hhmmss Hh Kk Ma On Sh Wz Ns Ny Is
2000+472 21266-131610| 480 68 107 40 40 480 480|
1514+197 21266-131915| 322 378 378 348 143 |
1758+388 21266-132719| 63 106 133 105 56 142 142|
1608+243 21266-133033| 321 362 367 373 143 373 |
1725+123 21266-133743| 248 155 184 159 83 191 248|
0954+658 21266-134235| 480 40 43 45 40 44 480|
1800+440 21266-134507| 212 262 282 278 81 282 |
1743+173 21266-135053| 75 115 134 133 40 134 |
1758+388 21266-135407| 112 104 104 108 55 111 112|
2201+315 21266-135702| 40 168 40 40 168 168 168|
0309+411 21266-135839| 71 71 71 |
End of listing.
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SKED Summary from file ./rd2107.skd for experiment RD2107
(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 = 92.9 (Baseline On-Sh on 0414-189) RMS = 8.1
Total time: 1440 minutes ( 24.0 hours).
Key: Hh=HARTRAO Kk=KOKEE Ma=MATERA On=ONSALA60 Sh=SESHAN25
Wz=WETTZELL Ns=NYALE13S Ny=NYALES20 Is=ISHIOKA
Hh Kk Ma On Sh Wz Ns Ny Is Avg
% obs. time: 37 36 64 71 52 72 9 67 40 50
% cal. time: 2 1 4 4 4 3 0 3 2 2
% slew time: 30 4 24 18 34 6 0 11 3 15
% idle time: 30 58 7 6 9 18 90 18 55 33
total # scans: 194 117 311 308 309 282 27 239 134 213
# scans/hour : 8 5 13 13 13 12 1 10 6 9
Avg scan (sec): 166 263 177 200 146 220 290 242 255 217
# 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): 4.12 3.93 7.05 7.90 5.77 7.93 1.00 7.41 4.38 5.50
# OF OBSERVATIONS BY BASELINE
| Hh Kk Ma On Sh Wz Ns Ny Is Total
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Hh| 0 189 170 180 171 6 113 51 880
Kk| 98 114 107 101 15 105 77 617
Ma| 291 285 277 26 224 126 1516
On| 282 272 27 237 129 1522
Sh| 260 25 223 132 1494
Wz| 24 212 123 1440
Ns| 27 22 172
Ny| 116 1257
Is| 776
Number of 2-station scans: 5
Number of 3-station scans: 19
Number of 4-station scans: 32
Number of 5-station scans: 69
Number of 6-station scans: 106
Number of 7-station scans: 87
Number of 8-station scans: 17
Number of 9-station scans: 0
Total number of scans: 335
Total number of obs: 4837
Total integrated obs-time: 805327
Average obs-time: 166.5
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: | 850| 503| 531| 498| 480| 379| 218| 137| 157| 114| 91| 182| 154| 89| 88| 56| 43| 41| 226|
Average X-band SNRs by baseline
| Hh Kk Ma On Sh Wz Ns Ny Is AVG
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Hh| - 44 37 57 67 85 56 50 52
Kk| 42 38 53 71 70 68 59 55
Ma| 58 66 108 56 76 52 68
On| 56 98 64 78 46 63
Sh| 94 74 85 89 72
Wz| 113 124 85 96
Ns| 152 85 89
Ny| 81 86
Is| 68
Average S-band SNRs by baseline
| Hh Kk Ma On Sh Wz Ns Ny Is AVG
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Hh| - 25 22 30 35 67 28 32 28
Kk| 36 35 43 59 87 56 68 50
Ma| 26 28 41 36 31 29 31
On| 25 39 39 32 26 29
Sh| 37 39 34 40 32
Wz| 69 47 44 42
Ns| 72 62 56
Ny| 41 38
Is| 40
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Recording mode
Name Code
AOVSX16W SX
Recording mode for: HARTRAO ISHIOKA KOKEE MATERA NYALES20 NYALE13S ONSALA60 SESHAN25 WETTZELL
Mode Tot.Rate #Chan Chan.BW Tot.BW #BBC #bits Tracks*(fan) Tot.tracks Barrel
Mk341:1 1024 Mbps 16 16 Mhz 256 Mhz 14 2 32*(1) 32 NONE
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
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Tape types
ID Station Tape length Speed
Hh HARTRAO Mark5B
Is ISHIOKA K5
Kk KOKEE Mark5B
Ma MATERA Mark5B
Ny NYALES20 Mark5B
Ns NYALE13S 17650feet (Thin ) 33333 (Low ) 1
On ONSALA60 17640feet (Thin ) 56250 (HIGH ) 1
Sh SESHAN25 Mark5B
Wz WETTZELL 17640feet (Thin ) 56250 (HIGH ) 1
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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 Ma On Sh Wz Ns Ny Hh Kk Ma On Sh Wz Ns Ny
Kk 20 Kk 15
Ma 20 20 Ma 15 15
On 20 20 20 On 15 15 15
Sh 20 20 20 20 Sh 15 15 15 15
Wz 20 20 20 20 20 Wz 15 15 15 15 15
Ns 20 20 20 20 20 20 Ns 15 15 15 15 15 15
Ny 20 20 20 20 20 20 20 Ny 15 15 15 15 15 15 15
Is 20 20 20 20 20 20 20 20 Is 15 15 15 15 15 15 15 15
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