[McIDAS #RYQ-556281]: nv1sae

Hi Julia,

re:
> I need some help in calculating viewing angle. Is there a McIDAS command
> to do it?

No.

> I have seen in the program manual that function nv1sae can do
> it. I searched through my computer. But I didn't find such fortran
> fuction.

The source module for the nv1sae entry point is created from the NVXSAE
entry point in each navigation file in McIDAS.  The list of these files
is:

/home/mcidas/mcidas2006/src% ls nvx*
nvxgeos.dlm  nvxmerc.dlm  nvxmsgt.dlm  nvxsin.dlm   nvxdmsp.dlm  nvxgvar.dlm
nvxmtst.dlm  nvxmoll.dlm  nvxps.dlm    nvxtanc.dlm  nvxgmsx.dlm  nvxkalp.dlm
nvxlalo.dlm  nvxmsat.dlm  nvxradr.dlm  nvxtiro.dlm  nvxgoes.dlm
nvxlamb.dlm  nvxmsg.dlm   nvxrect.dlm  nvxairc.dlm  nvxgraf.dlm



> The closest function whose name begins with nv1s is:
> 
> mcidas@dundo:~$ find ./ -name nv1s\*
> > ./mcidas2006/src/nv1sin.f
> > ./mcidas2006/src/nv1sin.o
> 
> Do you have any idea why there is no nv1sae in my installation?

The McIDAS build process creates three entry points for each routine specified:
nv1sae, nv2sae, and nv3sae.  The routine name in the navigation module files
is always named nvxsae (or NVXSAE).  The build process mangles the name into
nv1sae, nv2sae, and nv3sae.  The reason for this mangling is a bit hard to
explain other than the simple comment that SSEC found it useful to have three
different interfaces to the same code.

> Thank you very much.

Exactly what are you trying to accomplish?  I may be able to offer some advice
that will help you along.

Cheers,

Tom
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Ticket Details
===================
Ticket ID: RYQ-556281
Department: Support McIDAS
Priority: Normal
Status: Closed