[daip] reading wmap in aips

[Farhad Zadeh]

Thanks for your time, Eric. I will contact Goddard and
see if they can do better.
Cheers,
Farhad

On Thu, 3 Jun 2010, Eric Greisen wrote:

> Farhad Zadeh wrote:
>> I left one of the images on here
>> ftp://townes.phys.northwestern.edu/pub/
>> 
>> The original tar file is here but it is a big one.
>> 
>> http://lambda.gsfc.nasa.gov/product/map/dr4/maps_band_r9_iqu_7yr_get.cfm
>> 
>> I may use other regions of the survey as well so it would be good
>> to get the geometry right.
>
> I took a look at the one on your ftp site.  There are 4 images each in IMAGE 
> extensions in the file.  Their headers are extremely minimal and in fact what 
> little the main header says suggests that the data are in HEALPIX 
> order/projection not molweide.  There is nothing much that AIPS can do with 
> this unless I code MOL projection into AIPS in some way.
> That would be a lot of work and I leave for vacation this afternoon.
> Perhaps ds9 or some such program that uses the full WCSLIB could read in the 
> image in MOL and write it back out in some other projection such as AIT.
>
> Given issues we have with imaging etc I can't see this coordinate business 
> rising to a level that I could justify messing up AIPS (initially I always 
> create bugs before fixing them in overhauls)
> to support projections outside our normal range.  MOL is clearly desirable 
> but...
>
> Eric Greisen
>