Session Notes for rd1305
Prepared by K. Le Bail and J. Gipson, NVI, Inc./GSFC
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PURPOSE AND GENERAL NOTES
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Observing link sources between GAIA and ICRF2.
(Here: schedule as many sources as possible from the 24 sources of category 4
from the Bordeaux proposal.)
The Laboratory d'Astrophysique de Bordeaux (LAB) submitted a proposal to
observe 195 transfer sources between ICRF2 and the GAIA mission. These 195
sources are divided into four categories. The forth category contains 24 sources
that are not part of the IVS source monitoring program and that have a poor
position accuracy. The primary goal of observing them in several R&D sessions
is to improve their position accuracy.
In RD1305, we use the 24 sources of the category 4 of the GAIA proposal in
the astro mode of sked. Forty of the good geodetic sources are used as base of a
stable sources set and uniform sky coverage. We use the flux values provided by
LAB. Unfortunately, due to the weakness of some of the sources, we were not able
to schedule four of the 24 sources, and five other sources are scheduled only on
single baselines.
Kokee and Ny Alesund will observe INT E13204 during the time from
1815 UT to 1945 UT.
----- Parameter listing --------------------------------------
Experiment: RD1305 Description R&D-07/2013
Scheduler: NASA Correlator: HAYS
Start: 2013-204-17:30:00 End: 2013-205-17:30:00
Current yyyyddd: 2013204 (2013.56) ( 16497 MJD, TUES 23JUL.)
Greenwich sidereal time: 13:36: 0.00 (17:30: 0 UT)
Sun's RA and DEC: 8h 13.0m 19d 55.8
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First observations
Observation listing from file ./rd1305.skd for experiment RD1305
Source Start DURATIONS
name yyddd-hhmmss Hh Ho Kk Mc Ny Tc Wf
1324+224 13204-173000| 47 55 55 53|
0606-223 13204-173228| 276 585 585 399|
End of listing.
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Last observations
Observation listing from file ./rd1305.skd for experiment RD1305
Source Start DURATIONS
name yyddd-hhmmss Hh Ho Kk Mc Ny Tc Wf
0308-611 13204-174319| 150 150 |
0241+622 13204-174355| 47 58 58 50|
0410+110 13204-174913| 240 272 272|
1333-337 13204-174913| 303 303 |
1251-197 13204-175555| 506 465 506|
2145+082 13204-175630| 524 567 567 |
End of listing.
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SKED Summary from file ./rd1305.skd for experiment RD1305
(all scans with at least one subnet station)
Average number of obs. per baseline per source(normalized by up-time) = 4.0
Min = 0.0 Max = 46.5 (Baseline Kk-Ny on 2145+082) RMS = 7.3
Total time: 1437 minutes ( 24.0 hours).
Key: Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Mc=MEDICINA Ny=NYALES20
Tc=TIGO Wf=WESTFORD
Hh Ho Kk Mc Ny Tc Wf Avg
% obs. time: 52 56 54 56 48 13 56 48
% cal. time: 2 2 2 2 2 1 3 2
% slew time: 37 30 13 26 12 1 12 19
% idle time: 8 12 30 15 36 85 29 31
total # scans: 171 192 200 190 190 54 223 174
# scans/hour : 7 8 8 8 8 2 9 7
Avg scan (sec): 264 250 233 254 218 208 215 233
# data tracks: 32 32 32 32 32 32 32
# Mk5 tracks: 32 32 32 32 32 32 32
Total TBytes: 3.3 3.5 3.3 3.5 3.0 0.8 3.5 3.0
Total TB(M5): 2.9 3.1 3.0 3.1 2.6 0.7 3.1 2.6
# OF OBSERVATIONS BY BASELINE
| Hh Ho Kk Mc Ny Tc Wf Total
---------------------------------------------
Hh| 77 0 105 39 22 47 290
Ho| 95 21 25 19 4 241
Kk| 40 71 9 99 314
Mc| 112 10 119 407
Ny| 10 134 391
Tc| 26 96
Wf| 429
Number of 2-station scans: 288
Number of 3-station scans: 120
Number of 4-station scans: 66
Number of 5-station scans: 4
Number of 6-station scans: 0
Number of 7-station scans: 0
Total # of scans, observations: 478 1084
Average X-band SNRs by baseline
| Hh Ho Kk Mc Ny Tc Wf AVG
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Hh| 28 - 34 35 17 34 31
Ho| 25 22 28 17 34 26
Kk| 29 30 17 28 27
Mc| 58 18 44 42
Ny| 18 49 45
Tc| 19 18
Wf| 39
Average S-band SNRs by baseline
| Hh Ho Kk Mc Ny Tc Wf AVG
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Hh| 32 - 26 21 20 31 27
Ho| 45 23 20 22 28 34
Kk| 38 28 23 40 38
Mc| 22 18 28 26
Ny| 14 22 23
Tc| 17 19
Wf| 29
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Recording mode
Name Code
GEOSX8N 8F
Recording mode setup for:
HARTRAO HOBART26 KOKEE MEDICINA NYALES20 TIGOCONC WESTFORD
Mode Tot.Rate Tot.BandW #chan #bits Barrel
Mk341:1 256 Mbits 512 MHz 14 2 NONE
Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed
8.00 MHz 1 32(*1) 32 0.00
X-band spanned bw= 720.0 MHz rms spanned bw= 280.4 MHz
S-band spanned bw= 140.0 MHz rms spanned bw= 50.9 MHz
Effective number of 1-bit channels recorded per sub-pass
X S Total
19.128 11.477 30.605
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Tape types
ID Station Tape length Density Passes
Hh HARTRAO Mark5B
Ho HOBART26 Mark5A
Kk KOKEE Mark5B
Mc MEDICINA Mark5A
Ny NYALES20 Mark5B
Tc TIGOCONC Mark5B
Wf WESTFORD Mark5B
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SNR targets
Minimum SNR by baseline for multi-baseline scans
X-band (margin 0) S-band (margin 0)
Hh Ho Kk Mc Ny Tc Hh Ho Kk Mc Ny Tc
Ho 20 Ho 15
Kk 20 20 Kk 15 15
Mc 20 20 20 Mc 15 15 15
Ny 20 20 20 20 Ny 15 15 15 15
Tc 15 15 15 15 15 Tc 12 12 12 12 12
Wf 20 20 20 20 20 15 Wf 15 15 15 15 15 12
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