[daip] Wrong (u,v) coordinates?
Arnaud Collioud
Arnaud.Collioud at obs.u-bordeaux1.fr
Mon Jul 7 12:51:03 EDT 2014
> Try UVPLT and PRTUV on the initial data set. Also PRTAB on the FQ table. What do these tests show?
>go prtab
localhos PRTAB(31DEC14) 4 07-JUL-2014 17:11:30 Page 1
IYA09_S.3 .UV . 1 Disk= 1 FQ Table version 1
Title: AIPS FQ
Created by FITLD on 03-JUL-2014 14:23:13
Last written by FITLD on 03-JUL-2014 14:23:13
Ncol 5 Nrow 2 Sort cols:
Table has 1 keyword-value pairs:
NO_IF = 4
Table format incompatable with FITS ASCII tables
COL. NO. 1 2 3 4 5
ROW FRQSEL IF FREQ CH WIDTH TOTAL BAND SIDEBAND
F NUMBER HZ HZ HZ
1 1 0.000000D+00 2.500E+05 8.000E+06 1
1 7.000000D+07 2.500E+05 8.000E+06 1
1 3.850000D+08 2.500E+05 8.000E+06 1
1 4.900000D+08 2.500E+05 8.000E+06 1
2 2 -6.173000D+09 2.500E+05 8.000E+06 1
2 -6.143000D+09 2.500E+05 8.000E+06 1
2 -6.053000D+09 2.500E+05 8.000E+06 1
2 -6.033000D+09 2.500E+05 8.000E+06 1
**************************
UVPRT for source 1803+784 and for antenna 25 (the example I send you earlier)
> go uvprt
#go uvprt
localhos UVPRT(31DEC14) 4 07-JUL-2014 18:41:13 Page 1
File = IYA09_S.3 .UV . 1 Vol = 1 Userid = 4 Channel = 1 IF = 1
Chan freq= 2.232990000 GHz Ncor= 1 No. vis= 49173 Sort order= TB
U, V, W are in Kilo wavelengths at the selected frequency
Source 1803+784 ( 0) RA = 18 00 45.68 DEC = 78 28 4.0
Source= 1803+784 Freq= 2.232990000 Sort= TB 1 RR 2 RR 3 RR
Time Ant U(Kilo ) V(Kilo ) W(Kilo ) Amp Phas Wt Amp Phas Wt Amp Phas Wt
0/18:02:01.0 1-25 -262.25 22658.25 -1772.06 0.000 -29 0.9998 0.001-129 0.9998 0.001-133 0.9998
0/18:02:01.0 2-25 3998.54 20132.86 2057.63 0.001 -47 0.9998 0.003 -51 0.9998 0.003 -48 0.9998
0/18:02:01.0 3-25 -6058.30 8876.04 3838.21 0.001 180 0.9998 0.002 172 0.9998 0.003 168 0.9998
0/18:02:01.0 4-25 -2540.30 22416.18 -2647.32 0.001 -55 0.9998 0.001 -75 0.9998 0.001 -93 0.9998
0/18:02:01.0 5-25 10389.06 13014.47 2396.43 0.002 167 0.9997 0.003 141 0.9997 0.004 108 0.9997
0/18:02:01.0 8-25 -6438.77 4800.04 1651.45 0.001 102 0.8748 0.002 94 0.8748 0.002 86 0.8748
0/18:02:01.0 9-25 -858.34 3847.07 4041.58 0.001 161 0.9998 0.002 155 0.9998 0.001 132 0.9998
0/18:02:01.0 11-25 -1927.13 21901.90 -848.05 0.001-171 0.9998 0.002 153 0.9998 0.003 138 0.9998
0/18:02:01.0 12-25 -10101.65 14184.77 -1963.60 0.000 -57 0.9920 0.001 -59 0.9920 0.002 -55 0.9920
0/18:02:01.0 13-25 -7258.42 6023.24 1655.97 0.000-162 0.9998 0.001 46 0.9998 0.003 23 0.9998
0/18:02:01.0 14-25 -6275.81 5704.92 2430.25 0.000-163 0.9998 0.001 137 0.9998 0.003 127 0.9998
0/18:02:01.0 17-25 -10428.96 13283.09 -2263.05 0.000 -77 0.9997 0.001 73 0.9997 0.002 67 0.9997
0/18:02:01.0 18-25 -3836.64 4908.46 3635.55 0.001 172 0.9998 0.002-146 0.9998 0.003-137 0.9998
0/18:02:01.0 19-25 11032.18 9561.94 1821.14 0.000 19 0.9920 0.002 -48 0.9920 0.003 -65 0.9920
0/18:02:01.0 20-25 3651.13 12590.14 6121.12 0.001-123 0.9920 0.001-121 0.9920 0.002-102 0.9920
0/18:02:01.0 22-25 7771.32 10772.53 4694.34 0.000 -40 0.9920 0.000-177 0.9920 0.001 175 0.9920
0/18:02:01.0 23-25 -7367.70 7556.83 2315.15 0.000 25 0.9998 0.001 -21 0.9998 0.002 -11 0.9998
0/18:02:01.0 24-25 -6638.59 5782.97 2144.71 0.001 80 0.9998 0.001 89 0.9998 0.001 118 0.9998
0/18:02:01.0 25-26 1762.74 -21109.81 -618.04 0.001 -88 0.9998 0.002-114 0.9998 0.001-111 0.9998
0/18:02:01.0 25-27 -1493.31 -22831.68 1948.06 0.000 7 0.9920 0.001 124 0.9920 0.001 150 0.9920
0/18:02:01.0 25-30 1824.44 -21921.08 825.39 0.000 -13 0.9998 0.001 37 0.9998 0.001 89 0.9998
0/18:02:01.0 25-31 -6589.83 -20055.21 -817.40 0.000 -26 0.9920 0.000 81 0.9920 0.002 96 0.9920
0/18:02:01.0 25-32 792.07 -3772.93 -4003.54 0.002 158 0.9998 0.003 149 0.9998 0.002 162 0.9998
0/18:02:01.0 25-33 -9184.11 -10194.99 -3703.59 0.000-136 0.9920 0.001-176 0.9920 0.001 105 0.9920
Type Q to stop, just hit RETURN to continue
etc.
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UVPLT for source 1803+784
see attached plot...
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So basically, the uv coordinates seem to be already "bad" in the init uv file...
Cheers,
Arnaud
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