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Re: interpolation of angular data (interpolation in a circle) [message #79802]

Tue, 10 April 2012 18:41

Russell[1]
Messages: 101
Registered: August 2011

Senior Member

On Apr 10, 6:48 pm, Ed Hyer <ejh...@gmail.com> wrote:
> IDL geniuses,
>
> In my specific case, it is not interpolation across the international dateline, but instead interpolation across midnight, but it's the same problem. Can anyone point me to a resource on how this is done properly?
>
> Relatedly, I have found myself using a call that looks like:
> interpolated_data = INTERPOLATE(DATA,INTERPOL(OUTPUT_INDEX, OUTPUT_LOCATION, DATA_LOCATION))
> Is it actually necessary to use both INTERPOLATE() and INTERPOL(), or am I doing this wrong?
>
> Thanks,
>
> --Edward H.

I'm still not 100% sure what you're trying to do with the
interpolation across midnight issue, but if you're working with times,
then why not convert everything to Julian date, do your operations,
then convert back? Okay, you'll need to keep a few double precision
numbers around, but that seems like a simple request.

The second answer, Yes that's how you do it.

Russell

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		Re: interpolation of angular data (interpolation in a circle) By: Russell[1] on Tue, 10 April 2012 18:41
		Re: interpolation of angular data (interpolation in a circle) By: MarioIncandenza on Tue, 10 April 2012 22:09

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