Re: [idvusers] Irregular data analysis into grids, and the IDV

  • To: "Stuart Wier" <wier@xxxxxxxxxx>
  • Subject: Re: [idvusers] Irregular data analysis into grids, and the IDV
  • From: "Tom Whittaker" <whittaker@xxxxxxxx>
  • Date: Mon, 13 Oct 2008 09:42:42 -0500
Hi Stuart ...

The soon-to-be-released 2.6 beta version does contain the ability to
interpolate point obs to a grid, using the Barnes' analysis scheme.
I've seen the pre-release version and it works is hooked
into the point data source Chooser (with the parameters that could be
gridded showing up in the Field Selector).


On Wed, Oct 8, 2008 at 9:00 AM, Stuart Wier <wier@xxxxxxxxxx> wrote:
> What is a good way to analyse irregular point observations, for displaying as 
> 2D grids in the IDV?
> UNAVCO archives high precision monument GPS positions 
> (, and earth strain
> measurements, at more than 800 stations in North  America.  I would like to 
> analyse these randomly-located GPS changes
> in displacement into a continuous 2D field, to compare to the stain 
> measurements.
> Does the IDV have data processing capability that can be used for this, or 
> are Jython formulas for the IDV available, or
> are there sources for other software to preprocess the GPS observations into 
> 2D grids?  The GPS data has three
> components of displacement (x,y,z) as a function of time, amounting to 3D 
> velocity vectors, and three error estimates. A
> first approximation is a continuous field fitted to the values. Of course the 
> interesting places really are where
> continuity breaks down, as a faults.
> Stuart
> --
> Stuart Wier
> UNAVCO  Boulder, Colorado         (303) 381-7450
> The GEON IDV   
> For 4D exploration and display of your geophysics data
> "You can go just so far without physics." - Don Anderson
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Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
Cooperative Institute for Meteorological Satellite Studies (CIMSS)
1225 W. Dayton Street
Madison, WI  53706  USA
ph: +1 608 262 2759