[daip] UVFIX on Macs

[Andy Biggs]

Hi,

I've been reducing some old VLA data and noticed something when running 
UVFIX. As a dataset was observed using B1950 coordinates I ran UVFIX to 
precess it to J2000. As far as I can tell, UVFIX with its inputs set to 
their defaults will do this.

On Linux, plotting the data as a function of uv distance will look 
almost identical before and after running UVFIX, as I would expect. On 
my Mac, the max uv point moves from ~170 kl to 40 Ml. See the attached 
screenshot.

I've put the data in my ftp area if you'd like to take a look:

ftp://ftp.eso.org/pub/general/abiggs/DATA.FITS

My Mac is a MacBook Pro running an up-to-date Mojave. I tried it in 
31DEC19 and 31DEC20 - same results.

Andy

-- 

Andy Biggs
ARC Astronomer, ALMA Regional Centre
European Southern Observatory
Karl-Schwarzschild-Straße 2
D-85748 Garching
Germany

tel. +49 89 3200 6471
fax. +49 89 3200 6898
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