Session Notes for crf105
Prepared by K. Le Bail, NVI, Inc./GSFC and Alet de Witt, HartRAO
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PURPOSE AND GENERAL NOTES
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The purpose of this CRF session is to perform astrometric observations in order
to strenghten the ICRF in the southern sky. The scheduling technique basically
continues the technique used by Alan Fey in previous CRF sessions; however, this
session uses ten additional sources in the south provided by Alet de Witt.
The scheduling strategy follows the template of previous CRF sessions: the scan
length is 7 minutes for each source with a default flux value of 0.50 Jy in both X-
and S-band.
The source list (43 sources) is the source list of CRF102. It was modified by replacing
ten of the sources by ten other sources that had less than ten observations (as
found in the most recent S/X catalog) as well as K-band and Ka-band sources not
in the S/X catalog but that are potential targets.
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----- Parameter listing --------------------------------------
Experiment: CRF105 Description tbd
Scheduler: NASA Correlator: WASH
Start: 2018-051-17:30:00 End: 2018-052-17:30:00
Current yyyyddd: 2018051 (2018.14) ( 18170 MJD, TUES 20FEB.)
Greenwich sidereal time: 03:32:23 (17:30:00 UT)
Sun's RA and DEC: 22h 16.1m -10d 45.1
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First observations
Observation listing from file ./crf105.skd for experiment CRF105
Source Start DURATIONS
name yyddd-hhmmss Ht Ho K1 Ke Kk Nt Yg
0048-097 18051-173000| 420 420 |
1406-076 18051-173000| 420 420 420 420 420|
1256-220 18051-173819| 420 420 420 420|
0402-362 18051-173835| 420 420 |
0116-219 18051-174651| 420 420 |
1502+106 18051-174704| 420 420 420 420 420|
End of listing.
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Last observations
Observation listing from file ./crf105.skd for experiment CRF105
Source Start DURATIONS
name yyddd-hhmmss Ht Ho K1 Ke Kk Nt Yg
0048-097 18052-170159| 420 420 |
1236+077 18052-170306| 420 420 420 420 420|
0215+015 18052-171002| 420 420 |
1406-076 18052-171132| 420 420 420 420 420|
0332-403 18052-171825| 420 420 |
1622-253 18052-172008| 420 420 420 420 420|
End of listing.
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SKED Summary from file ./crf105.skd for experiment CRF105
(all scans with at least one subnet station)
Average number of obs. per baseline per source(normalized by up-time) = 7.3
Min = 0.0 Max = 44.6 (Baseline Ht-Nt on 0008-264) RMS = 4.7
Total time: 1437 minutes ( 24.0 hours).
Key: Ht=HART15M Ho=HOBART26 K1=KASHIM11 Ke=KATH12M Kk=KOKEE
Nt=NOTO Yg=YARRA12M
Ht Ho K1 Ke Kk Nt Yg Avg
% obs. time: 73 76 70 77 55 60 76 70
% cal. time: 2 2 2 2 1 1 2 2
% slew time: 9 20 3 5 4 11 5 9
% idle time: 15 1 25 15 39 26 16 20
total # scans: 150 157 143 158 112 124 155 142
# scans/hour : 6 7 6 7 5 5 6 6
Avg scan (sec): 420 420 420 420 420 420 420 420
# data tracks: 16 16 16 16 16 16 16
# Mk5 tracks: 16 16 16 16 16 16 16
Total TB(M5): 1.01 1.06 0.96 1.06 0.75 0.83 1.04 0.96
# OF OBSERVATIONS BY BASELINE
| Ht Ho K1 Ke Kk Nt Yg Total
---------------------------------------------
Ht| 47 43 49 0 124 59 322
Ho| 130 156 105 25 143 606
K1| 132 97 19 119 540
Ke| 104 27 145 613
Kk| 0 94 400
Nt| 36 231
Yg| 596
Number of 2-station scans: 99
Number of 3-station scans: 15
Number of 4-station scans: 25
Number of 5-station scans: 112
Number of 6-station scans: 16
Number of 7-station scans: 0
Total number of scans: 267
Total number of obs: 1654
Total integrated obs-time: 694680
Average obs-time: 420.0
Average X-band SNRs by baseline
| Ht Ho K1 Ke Kk Nt Yg AVG
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Ht| 39 14 22 - 48 20 33
Ho| 14 21 33 46 20 24
K1| 8 12 17 7 11
Ke| 18 26 11 16
Kk| - 16 20
Nt| 23 39
Yg| 15
Average S-band SNRs by baseline
| Ht Ho K1 Ke Kk Nt Yg AVG
--------------------------------------------
Ht| 33 25 19 - 45 21 32
Ho| 20 16 39 35 17 23
K1| 12 29 27 12 18
Ke| 23 21 10 15
Kk| - 24 29
Nt| 22 36
Yg| 16
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Recording mode
Name Code
CDP-SX SX
Recording mode for: HART15M HOBART26 KASHIM11 KATH12M NOTO YARRA12M
Mode Tot.Rate Tot.BandW #BBC #bits Barrel
Mk341:2 128 Mbits 64 MHz 14 1 NONE
Chan.BW #Subpasses Tracks(*fan) Tot.tracks
4.00 MHz 1 16(*2) 32
X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz
S-band spanned bw= 85.0 MHz rms spanned bw= 33.1 MHz
Effective number of 1-bit channels recorded per sub-pass
X S Total
10.00 6.00 16.00
Recording mode for: KOKEE
Mode Tot.Rate Tot.BandW #BBC #bits Barrel
Mk341:1 128 Mbits 64 MHz 14 1 NONE
Chan.BW #Subpasses Tracks(*fan) Tot.tracks
4.00 MHz 1 16(*1) 16
X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz
S-band spanned bw= 85.0 MHz rms spanned bw= 33.1 MHz
Effective number of 1-bit channels recorded per sub-pass
X S Total
10.00 6.00 16.00
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Tape types
ID Station Tape length Density Passes
Ht HART15M Mark5B
Ho HOBART26 Mark5B
K1 KASHIM11 K5
Ke KATH12M Mark5B
Kk KOKEE Mark5B
Nt NOTO Mark5B
Yg YARRA12M Mark5B
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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)
Ht Ho K1 Ke Kk Nt Ht Ho K1 Ke Kk Nt
Ho 14 Ho 12
K1 12 12 K1 10 10
Ke 14 14 12 Ke 12 12 10
Kk 14 14 12 14 Kk 12 12 10 12
Nt 14 14 12 14 14 Nt 12 12 10 12 12
Yg 14 14 12 14 14 14 Yg 12 12 10 12 12 12
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