Poisson_grid_fill Documentation

Hello,

I used the function "poisson_grid_fill" for filling up missing SST values.
Can anybody tell me where can I get the documentation of how the function
works. I need that for writing purpose.

Thanks,

-- 
"Numbing the pain for a while will make it worse when you finally feel it.
 ~J.K. Rowling"
*****************************************
Soumik Basu
Graduate Student, Research Assistant
International Arctic Research Center
University of Alaska Fairbanks
Fairbanks,Alaska,USA
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