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Message: problem using W3FB11 to get xi/xj values for some lat/lon

Posted by william chan on 2 Jan 02, 19:16 MT

I am trying to get grid values for the RUC2 at
18degN lat and -80degE Lon. Using the W3FB11 routine,
I return indicies of j(lat) = -3 and i(lon) = 122. Why am I exceeding the grid range for j since the southern limit of
the RUC2 is from 16.2810N to 17.3400N Lat ?

The variables I'm using are:
ALAT1 = 16.2810
ELON1 = -126.1378
DX = 40635.0
ELONV = -95
ALATAN = 25

Thanks in advance.

William

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