Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/pub/people/vlbi/v190/v190phasereftest/v190sch.pa Дата изменения: Wed Mar 15 05:15:54 2006 Дата индексирования: Fri Dec 28 06:30:16 2007 Кодировка: Поисковые слова: п п п п п п п п п п п п п п

COVER INFORMATION

Station: PARKES (Code Pa )
Experiment: Check of potential phase ref source for v190
Exp. Code: v190


Schedule Version: 1.00
Processed by SCHED version: 6.02 July 2005

PI: Adam Deller

Address: LBA
LBA
LBA


Phone: 02 6790 4000
EMAIL: adeller@astro.swin.edu.au
Fax:
Phone during observation: 02 6790 4000

Observing mode: Fringe-check

Notes:




Schedule for PARKES (Code Pa ) Page 2
Check of potential phase ref source for v190
UP: D => Below limits; H => Below horizon mask. blank => Up.
Early: Seconds between end of slew and start. Dwell: On source seconds.
Tapes: Drive, Index, Start footage / Direction, Head Group, End footage.
TPStart: Tape motion start time. Frequencies are LO sum (band edge).
SYNC: Time correlator is expected to sync up.
----------------------------------------------------------------------------------------
Start UT Source Start / Stop Early Tapes TPStart
Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC
----------------------------------------------------------------------------------------

--- Wed 15 Mar 2006 Day 74 ---

Next scan frequencies: 8417.00 8417.00
Next BBC frequencies: 3917.00 3917.00
Next scan bandwidths: 16.00 16.00

02 30 00 0537-441 23 53 18 24.6 128.0 -5.8 D -113.0 0 1 1 52 02 30 00
02 40 00 --- 00 03 20 26.3 127.2 -5.6 D -111.6 0 F 1 263 02 30 10

02 40 00 0438-4728 00 03 20 37.3 127.6 -4.6 -100.6 -46 1 1 263 02 40 00
02 45 00 --- 00 08 21 38.1 127.4 -4.5 -99.8 254 F 1 368 02 40 10

02 45 00 0437-4715 00 08 21 38.3 127.1 -4.5 -99.7 -9 1 1 368 02 45 00
02 50 00 --- 00 13 21 39.1 126.9 -4.4 -98.9 291 F 1 473 02 45 10

02 50 00 0438-4728 00 13 21 38.9 127.2 -4.4 -98.9 -9 1 1 473 02 50 00
02 55 00 --- 00 18 22 39.8 127.1 -4.3 -98.1 291 F 1 578 02 50 10

02 55 00 0437-4715 00 18 22 40.0 126.7 -4.3 -98.0 -9 1 1 578 02 55 00
03 00 00 --- 00 23 23 40.8 126.6 -4.2 -97.2 291 F 1 683 02 55 10

03 00 00 0438-4728 00 23 23 40.6 126.9 -4.3 -97.3 -9 1 1 683 03 00 00
03 05 00 --- 00 28 24 41.4 126.8 -4.2 -96.5 291 F 1 788 03 00 10

03 05 00 0437-4715 00 28 24 41.7 126.4 -4.2 -96.4 -9 1 1 788 03 05 00
03 10 00 --- 00 33 25 42.5 126.3 -4.1 -95.5 291 F 1 893 03 05 10

03 10 00 0438-4728 00 33 25 42.3 126.6 -4.1 -95.6 -9 1 1 893 03 10 00
03 15 00 --- 00 38 25 43.1 126.5 -4.0 -94.8 291 F 1 998 03 10 10

03 15 00 0437-4715 00 38 25 43.4 126.2 -4.0 -94.7 -9 1 1 998 03 15 00
03 20 00 --- 00 43 26 44.2 126.1 -3.9 -93.8 291 F 1 1103 03 15 10

03 20 00 0438-4728 00 43 26 44.0 126.5 -3.9 -93.9 -9 1 1 1103 03 20 00
03 25 00 --- 00 48 27 44.8 126.4 -3.8 -93.0 291 F 1 1208 03 20 10

03 25 00 0437-4715 00 48 27 45.1 126.1 -3.8 -93.0 -9 1 1 1208 03 25 00
03 30 00 --- 00 53 28 45.9 126.0 -3.7 -92.1 291 F 1 1313 03 25 10


SETUP FILE INFORMATION:
NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings.


Setup file: /nfs/atapplic/vlbi/sched/setups/lba3cm-2p-1IF.set
Matches group pa3cm in /nfs/atapplic/vlbi/sched/catalogs/freq.dat

Setup group: 1 Station: PARKES Total bit rate: 128
Format: S2 Bits per sample: 2 Sample rate: 32.000
Number of channels: 2 Passes/head pos: 1 Speedup factor: 1.00

Tape used at high density at 4.200 ips.
Time per pass is 361.90 minutes.

1st LO= 4500.00 4500.00
Net SB= U U
Pol. = RCP LCP
BBC = 1 2
BBC SB= U U
IF = A C

The following frequency sets based on this setup were used.

Frequency Set: 1 Setup file default. No pcal detection.
LO sum= 8417.00 8417.00
BBC fr= 3917.00 3917.00
Bandwd= 16.000 16.000

Track assignments are:
track1= 0, 0
barrel=roll_off
 SOURCE LIST -- Check of potential phase ref source for v190
Catalog positions marked with *.
Precession of date coordinates is based on stop time of first scan.
Names used in schedule marked with *.
Short names used in VLA and SNAP files marked with +.
Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900
No adjustments are made for rates (DRA, DDEC).
Scan hours are for recording scans only.
Baseline hours are only counted for scans above horizon at both ends.

Source Source position (RA/Dec) Error
(B1950) (J2000) (Date) (mas)

* 0437-4715 04 35 49.620369 * 04 37 15.700000 04 37 26.157762 0.00
-47 21 05.46544 *-47 15 08.40000 -47 14 34.60967 0.00
From catalog imbedded in main SCHED input file.
0.417 scan hours, 2.427 baseline hours above horizon.

* 0438-4728 04 37 22.021899 * 04 38 47.417000 04 38 57.798060 0.00
-47 33 56.91135 *-47 28 06.12400 -47 27 33.13027 0.00
From catalog imbedded in main SCHED input file.
0.417 scan hours, 2.368 baseline hours above horizon.

* 0537-441 05 37 21.071262 * 05 38 50.361400 05 39 01.513861 0.00
-44 06 44.66133 *-44 05 08.93400 -44 05 06.85752 0.00
From catalog imbedded in main SCHED input file.
0.167 scan hours, 0.500 baseline hours above horizon.



The solar corona can cause unstable phases for sources too close to the Sun.
SCHED provides warnings at individual scans for distances less than 10 degrees.
The distance from the Sun to each source in this schedule is:
Source Sun distance (deg)
0437-4715 77.9
0438-4728 78.2
0537-441 88.4

Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes
that the Sun will cause amplitude reductions on the longest VLBA baselines
at a solar distance of 60deg F^(-0.6) where F is in GHz.
For common VLBI bands, this is:
327 MHz 117. deg
610 MHz 81. deg
1.6 GHz 45. deg
2.3 GHz 36. deg
5.0 GHz 23. deg
8.4 GHz 17. deg
15.0 GHz 12. deg
22.0 GHz 9. deg
43.0 GHz 6. deg