hdf files

[Jean Pierre Arabonis]

Hi all
    I'm new to hdf files and am having a problem opening a hdf file from
ftp://oceans.gsfc.nasa.gov/MODISA/L3SMI/2005/A2005016.L3m_DAY_CHLO_4KM.bz2

I bunzip the file and then try opening it with grads 1.8 (gradshdf), ie

ga-> sdfopen A2005017.L3m_DAY_CHLO_4KM
Scanning self-describing file:  A2005017.L3m_DAY_CHLO_4KM
SDF file has no discernable X coordinate.
ga->

but using Rsinc Envi it opens fine - so I assume the file is not corrupted.

    Anyone have some pointers for me.

Many thanks
       Jean Pierre


--
Jean Pierre Arabonis
arabonis at egs.uct.ac.za
Tel 021 780 1021 cell 084 401 1365
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