plotting QuikSCAT L2B

From: Paula Doubrawa Moreira <pmoreira_at_nyahnyahspammersnyahnyah>
Date: Tue Jul 12 2011 - 14:51:04 MDT

Hi, all -

I am trying to plot QuikSCAT L2B winds. These are swath (orbit) files, one
orbital revolution per file (not gridded!).

Since it is not gridded, so I'm having trouble *assigning coordinate
variables to plot it over a map*. I can't find much help on the QuikSCAT
manual about how to interpret the variable dimensions in the file, so I'm
writing for some advice.

The variables look like this:

*Variable: v*
*Type: float*
*Total Size: 1974784 bytes*
* 493696 values*
*Number of Dimensions: 2*
*Dimensions and sizes: [Wind_Vector_Cell_Row | 3248] x [Wind_Vector_Cell |
*Coordinates: *
*Number Of Attributes: 9*
* _FillValue : 1e+20*
* long_name : wind_speed_selection*
* units : m/s*
* SDS_type : Single*
* scale_factor_err : 0*
* add_offset_err : 0*
* calibrated_nt : 1*
* hdf_name : wind_speed_selection*
* valid_range : ( 0, 50 )*

3248 is number of rows and 152 is number of columns, so I have created
regular lat/lon coordinates using these numbers and the functions latGlobeF
and lonGlobeF.

I successfully plotted the data over a map, but I don't think this is
correct. I have checked the values for the assigned lats/lons for some
points and they don't match to the original file. Creating a regular grid
may not be the best approach. Any hints?

Thanks a lot!

*Paula Doubrawa Moreira**
*Graduate Student - Research Assistant
International Arctic Research Center
University of Alaska Fairbanks

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Received on Tue Jul 12 14:51:13 2011

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