[Spice_discussion] ITOKAWA plate model

Ed Wright ed.wright at jpl.nasa.gov
Mon Jun 27 11:41:00 PDT 2005

To: Naru Hirata
From: Ed Wright, JPL/NAIF

On Jun 25, 2005, at 1:14 AM, Naru HIRATA wrote:

> I have two problems on the platelib of SPICE.
> I found that the routine 'PLBORE' returns an error at the particular
> combination of a viewing positon and a LOS vector, i.e.


> The expected result is "not found", but the 'NOTINGRID' error has 
> ocuured
> with a parameters close to the above values. The problematic parameters
> seem to be limitted to narrow range (about 0.00000001 for LOS, 
> 0.000001 for
> position).
> Another question is also related to the error.
> I want to skip a parameter with that error, so set the error handling 
> mode
> to "RETURN" with
>>    erract_c ("SET",STRLEN,"RETURN");
> to return on the entry point and to continue a process.
> However, the program doesn't return to the main function after error.
> Am I misunderstanding something on error handling of SPICE?

Please allow me a few hours to investigate.

As always,
Ed Wright
ed.wright at jpl.nasa.gov

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