[daip] FITLD broken?
Adam Deller
adeller at nrao.edu
Wed Jun 16 13:18:46 EDT 2010
Hi Amy,
Yes, I'm around (room 300). I am not using a private version - 'which
aips' reports /home/AIPS/31DEC10/LNX64/SYSTEM/COAOARN/aips
Cheers,
Adam
On Wed, Jun 16, 2010 at 11:11 AM, Amy Mioduszewski <amiodusz at nrao.edu> wrote:
> Are you around? I loaded your data and it was fine. Are you using a
> private version of AIPS?
>
> Amy
>
> Adam Deller wrote:
>>
>> Hmmm, ok. Yes, this is a partially processed file (and so are all the
>> others I found to be faulty). I'm guessing its a date problem (either
>> with the epoch or with the observation) somewhere.
>>
>> Cheers,
>> Adam
>>
>> On Wed, Jun 16, 2010 at 10:15 AM, Amy Mioduszewski <amiodusz at nrao.edu>
>> wrote:
>>>
>>> Hi Adam,
>>>
>>> Can't be since I loaded some hardware correlator data on the weekend and
>>> it
>>> was fine. Also that looks like one of the partially processed files
>>> (rather
>>> than the correlator job files), is that correct?
>>>
>>> Amy
>>>
>>> Adam Deller wrote:
>>>>
>>>> Hi Amy,
>>>>
>>>> An example can be found at
>>>>
>>>>
>>>>
>>>> /home/marathon2/data/1023+0038/bd141a/BD141A_UG_HPOL4IF8MHZ16CH_1.6515GHZ00
>>>>
>>>> Although I suspect any and all VLBA hardware correlator data is
>>>> probably affected.
>>>>
>>>> Cheers,
>>>> Adam
>>>>
>>>> On Wed, Jun 16, 2010 at 10:09 AM, Amy Mioduszewski <amiodusz at nrao.edu>
>>>> wrote:
>>>>>
>>>>> Yea, Eric made some changes. Point me at the data you are using.
>>>>> Although
>>>>> I cannot promise too much since I am taking Thurs/Friday off.
>>>>>
>>>>> Amy
>>>>>
>>>>> Adam Deller wrote:
>>>>>>
>>>>>> Hi Amy,
>>>>>>
>>>>>> Running from version 'NEW' works. Running from 'TST' does not. I
>>>>>> notice they have different adverbs, so obviously some code surgery has
>>>>>> been done somewhere.
>>>>>>
>>>>>> Cheers,
>>>>>> Adam
>>>>>>
>>>>>> On Wed, Jun 16, 2010 at 9:22 AM, Amy Mioduszewski <amiodusz at nrao.edu>
>>>>>> wrote:
>>>>>>>
>>>>>>> Ack, and Eric isn't here. Can you test it in version 'new'?
>>>>>>>
>>>>>>> Thanks!
>>>>>>>
>>>>>>> Amy
>>>>>>>
>>>>>>> Adam Deller wrote:
>>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> There is something very strange going on with FITLD for VLBA data in
>>>>>>>> AIPS - it is scrambling the SU table for some files (but not all).
>>>>>>>> I
>>>>>>>> have checked out this particular file (you can see it at
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> /home/marathon2/data/1023+0038/bd141a/BD141A_UG_HPOL4IF8MHZ16CH_1.6515GHZ00)
>>>>>>>> using fv and see a sensible looking SU table. However, as soon as I
>>>>>>>> load it into AIPS with FITLD the SU table reads:
>>>>>>>>
>>>>>>>> 1 5.0000000000D+05 1.4176255806D+02 3.9039125519D+01
>>>>>>>> 2.0000000000D+03 1.0792773795D+02 4.5395855014D+01
>>>>>>>> 2 5.0000000000D+05 1.5612327792D+02 -8.8208229444D-01
>>>>>>>> 2.0000000000D+03 1.3016422419D+02 7.9956464878D+00
>>>>>>>> 3 5.0000000000D+05 1.5591154583D+02 4.0463333333D-01
>>>>>>>> 2.0000000000D+03 1.2979993496D+02 9.2488222431D+00
>>>>>>>> 4 5.0000000000D+05 1.5271527786D+02 -2.0054371833D+00
>>>>>>>> 2.0000000000D+03 1.2689149360D+02 6.4704735040D+00
>>>>>>>>
>>>>>>>> where the columns are channel bandwidth, RA epoch (deg), Dec epoch
>>>>>>>> (deg), Epoch (years), RA apparent (deg) and Dec apparent (deg). You
>>>>>>>> can see that the apparent source positions have changed by many
>>>>>>>> degrees - something is amiss. I tried running FITLD from 31DEC09
>>>>>>>> but
>>>>>>>> got the same result. This is data from the hardware correlator from
>>>>>>>> late 2008.
>>>>>>>>
>>>>>>>> Cheers,
>>>>>>>> Adam
>>>>>>>>
>>>>>>
>>>>
>>>>
>>>
>>
>>
>>
>
>
--
!=============================================================!
Dr. Adam Deller Ph +1 575 835 7492
Jansky Fellow Fax +1 575 835 7027
National Radio Astronomy Observatory
Socorro NM 87801, USA
!=============================================================!
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