[daip] Trouble reading in lowband data set with OBIT, in AIPS.

[Susan Neff]

Hi Bill and Frazer,

Bill, you're right, it's 1024 - sorry, that's me being 
dystypic again.

Both of you came back with reading the data in config 
1 by specifying
spectral windows and channels.  I will do that.

I had a very strong memory of just running BDF2AIPS 
with the
instructions that Eric provides for "normal" EVLA data 
- where
I ran BDF2AIPS with nearly no inputs and it does 
everything magically.
However, this morning I went back through my email 
from August,
where Frazer was coaching me through this, and there 
are instructions
for how to read in the data in 3 different passes of 
BDF2AIPS.
So, my very strong memory is apparently a pipe-dream.

My apologies for bothering you - will make sure I 
capture this in my
notes this time.

-s-


On 10/9/12 8:01 AM, bcotton at nrao.edu wrote:
> Susan,
>
>     I think you're misremembering, the P band data has 1024 channels:
>
> ASDMList: info    20121009T054629 ASDMList Begins, svn ver. 428M
> ASDMList: info    20121009T054629 Date/Time: 2012-10-09  05:46:29
> Summary of ASDM in /lustre/fowen/TSUB0001.sb11188347.eb11264203.56135.03471128472
>    Configuration Summary
> Observed 2012-07-27, Array = EVLA, Observer = Frazer Owen
> Configurations
>   
>    Configuration  0, no. SpWin = 1
>       SpWin=  0 Freq=   0.054 GHz, 16128 chan of BW=    1.984 kHz, tot BW=  32.000 MHz, USB Band=EVLA_4
>    Configuration  1, no. SpWin = 4
>       SpWin=  1 Freq=   0.024 GHz, 512 chan of BW=  125.000 kHz, tot BW=  64.000 MHz, USB Band=EVLA_4
>       SpWin=  2 Freq=   0.152 GHz, 1024 chan of BW=  125.000 kHz, tot BW= 128.000 MHz, USB Band=EVLA_4
>       SpWin=  3 Freq=   0.280 GHz, 1024 chan of BW=  125.000 kHz, tot BW= 128.000 MHz, USB Band=EVLA_4
>       SpWin=  4 Freq=   0.408 GHz, 1024 chan of BW=  125.000 kHz, tot BW= 128.000 MHz, USB Band=EVLA_4
>   
>     To get the first spectral window of configuration 1, specify 512
> channels and for 2-4, 1024 channels.  All of the low band data I've
> seen looks like this.  This data read fine when I tried it.
>
>     ASDMList (BDFLIST in AIPSIsh) is useful for cracking the ASDM.
>
> -Bill
>
>