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<DIV>Dear sir or madam,</DIV>
<DIV> </DIV>
<DIV>We got the data from WSRT in UVFIT format, but some of the files are unable
to load in AIPS with FITLD correctly. </DIV>
<DIV> </DIV>
<DIV>Error messages are as follows (pictures get from screen), there are two
kinds of errors.</DIV>
<DIV><EM><STRONG></STRONG></EM> </DIV>
<DIV><IMG
style="BACKGROUND-IMAGE: none; BORDER-BOTTOM: 0px; BORDER-LEFT: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; DISPLAY: inline; BORDER-TOP: 0px; BORDER-RIGHT: 0px; PADDING-TOP: 0px"
title=FITRXU border=0 alt=FITRXU
src="cid:0A839EFFE2BF4F5391B49FD628F0EB6C@JohnPC" width=503 height=320></DIV>
<DIV>In this condition, the data are actually there and has a header we can
read, but we have no idea whether the data has been loaded correctly.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><IMG
style="BACKGROUND-IMAGE: none; BORDER-BOTTOM: 0px; BORDER-LEFT: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; DISPLAY: inline; BORDER-TOP: 0px; BORDER-RIGHT: 0px; PADDING-TOP: 0px"
title=UVFDAT border=0 alt=UVFDAT
src="cid:32B7D8E282BF40A2BC9F818852BC9860@JohnPC" width=503 height=151></DIV>
<DIV>In this condition, the data are not loaded, we cannot find it with
UCAT.</DIV>
<DIV><SPAN
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lang=EN-US></SPAN></SPAN></SPAN></SPAN></SPAN> </DIV>
<DIV>My OS is Fedora 13. AIPS version is
31DEC10<EM><STRONG>.</STRONG></EM> </DIV>
<DIV> </DIV>
<DIV>The parameter values that we have set is as follow:</DIV>
<DIV> </DIV>
<DIV>AIPS 1: FITLD: Task to store an image or UV data from a FITS
tape</DIV>
<DIV>AIPS 1: Adverbs
Values
Comments</DIV>
<DIV>AIPS 1:
----------------------------------------------------------------</DIV>
<DIV>AIPS 1: INTAPE
1
Input tape drive # (0 => 1)</DIV>
<DIV>AIPS 1: NFILES
0
# of files to advance on tape</DIV>
<DIV>AIPS 1: DATAIN 'FITS:11002869_S0_T0_FM Disk file
name</DIV>
<DIV>AIPS 1:
0.UVF'</DIV>
<DIV>AIPS 1: OUTNAME
'X0'
File name (name)</DIV>
<DIV>AIPS 1: OUTCLASS '
'
File name (class)</DIV>
<DIV>AIPS 1: OUTSEQ
0
File name (seq. #)</DIV>
<DIV>AIPS
1:
0 => highest unique number</DIV>
<DIV>AIPS
1:
=> matching (on VLBA)</DIV>
<DIV>AIPS
1:
-1 => FITS tape value</DIV>
<DIV>AIPS 1: OUTDISK
0
Disk drive # (0 => any)</DIV>
<DIV>AIPS 1: OPTYPE '
'
Type of data to load,</DIV>
<DIV>AIPS
1:
' ' => all types</DIV>
<DIV>AIPS
1:
'UV' => UV data</DIV>
<DIV>AIPS
1:
'IM' => images</DIV>
<DIV>AIPS 1: NCOUNT
0
Number of files to load.</DIV>
<DIV>AIPS 1: DOTABLE
1
True (1.0) means load tables</DIV>
<DIV>AIPS
1:
for images.</DIV>
<DIV>AIPS 1: DOUVCOMP
1
>0 => compressed data (FITS)</DIV>
<DIV>AIPS 1: DOCONCAT
-1
>0 -> if VLBA correlator data</DIV>
<DIV>AIPS
1:
append data to existing</DIV>
<DIV>AIPS
1:
files, or if no appropriate</DIV>
<DIV>AIPS
1:
files exist create a new file</DIV>
<DIV>AIPS
1:
and append all data to that</DIV>
<DIV>AIPS
1:
file.</DIV>
<DIV>AIPS
1:
*****************************</DIV>
<DIV>AIPS
1:
Following adverbs are useful</DIV>
<DIV>AIPS
1:
only when reading VLBA</DIV>
<DIV>AIPS
1:
distribution tapes.</DIV>
<DIV>AIPS
1:
*****************************</DIV>
<DIV>AIPS 1: CLINT
0
CL entry interval (min)</DIV>
<DIV>AIPS
1:
0 => 1 minute.</DIV>
<DIV>AIPS 1: SOURCES *all '
'
Source list to accept.</DIV>
<DIV>AIPS 1: QUAL
-1
Source qualifier -1=>all</DIV>
<DIV>AIPS 1: TIMERANG *all
0
Timerange selected</DIV>
<DIV>AIPS 1: BCHAN
1
Lowest spectral channel</DIV>
<DIV>AIPS
1:
number to select in each IF.</DIV>
<DIV>AIPS
1:
0=>1</DIV>
<DIV>AIPS 1: ECHAN
0
Highest spectral channel</DIV>
<DIV>AIPS
1:
number to select in each IF.</DIV>
<DIV>AIPS
1:
0=>highest</DIV>
<DIV>AIPS 1: BIF
1
Lowest IF number 0=>1</DIV>
<DIV>AIPS 1: EIF
1
Highest IF number 0=>all</DIV>
<DIV>AIPS 1: DIGICOR
1
Controls the application of</DIV>
<DIV>AIPS
1:
the VLBA correlator's digital</DIV>
<DIV>AIPS
1:
correction.</DIV>
<DIV>AIPS
1:
0 or 1 => perform corrections</DIV>
<DIV>AIPS
1:
2 => perform cross-power</DIV>
<DIV>AIPS
1:
corrections, do total-power</DIV>
<DIV>AIPS
1:
only if zero padding used.</DIV>
<DIV>AIPS
1:
-1 => do NOT perform</DIV>
<DIV>AIPS
1:
corrections.</DIV>
<DIV>AIPS
1:
SEE HELP for more details</DIV>
<DIV>AIPS 1: SELBAND
-1
Bandwidth to select (kHz)</DIV>
<DIV>AIPS 1: SELFREQ
-1
Frequency to select (MHz).</DIV>
<DIV>AIPS
1:
See HELP.</DIV>
<DIV>AIPS 1: FQTOL
-1
Frequency tolerance assigned</DIV>
<DIV>AIPS
1:
to SELFREQ, FITLD will select</DIV>
<DIV>AIPS
1:
data with freq. of SELFREQ</DIV>
<DIV>AIPS
1:
+/- FQTOL.</DIV>
<DIV>AIPS
1:
The unit of FQTOL is kHz.</DIV>
<DIV>AIPS
1:
<=0 => 10 kHz</DIV>
<DIV>AIPS 1: WTTHRESH
0
Flagging threshold based on</DIV>
<DIV>AIPS
1:
weights. See HELP.</DIV>
<DIV>AIPS
1:
0 => no flagging</DIV>
<DIV>AIPS
1:
1 => will flag ALL data</DIV>
<DIV>AIPS 1: OPCODE '
'
Specify if wish to keep VT</DIV>
<DIV>AIPS
1:
(VLBA Tape Statistics) table</DIV>
<DIV>AIPS
1:
and other tables. See HELP.</DIV>
<DIV>AIPS
1:
' ' => do not save tables</DIV>
<DIV>AIPS 1: NPIECE
0
Maximum uv table piece to</DIV>
<DIV>AIPS
1:
load (ignored for tape unless</DIV>
<DIV>AIPS
1:
NCOUNT = 1)</DIV>
<DIV>AIPS 1: ERROR
2
>= 2 -> do not use AIPS</DIV>
<DIV>AIPS
1:
history in the FITS file</DIV>
<DIV>AIPS 1: ANTNAME *all '
'
List antenna station names in</DIV>
<DIV>AIPS
1:
desired order (IDI data only)</DIV>
<DIV> </DIV>
<DIV><SPAN
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lang=EN-US><SPAN
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lang=EN-US><SPAN
style="FONT-FAMILY: ; mso-bidi-font-size: 11.0pt; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: minor-bidi; mso-ansi-language: en-us; mso-fareast-language: zh-cn; mso-bidi-language: ar-sa"
lang=EN-US></SPAN></SPAN></SPAN></SPAN></FONT></SPAN> </DIV>
<DIV>We do not understand what in the cause of an error. We try to read them in
different versions of AIPS and try to load them with other task like UVLOD, but
it does not make a different.</DIV>
<DIV> </DIV>
<DIV>Could you help on this? Does it indicate that the files were
corrupted?</DIV>
<DIV> </DIV>
<DIV>Thanks in advance!</DIV>
<DIV> </DIV>
<DIV>Best wishes,<BR>
<DIV
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<DIV style="FONT: 10pt tahoma">
<DIV><FONT size=3 face=Calibri>Junduo Li</FONT></DIV>
<DIV><FONT size=3 face=Calibri></FONT>
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