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What are the values for the lats and lons in TRMM 3B42 and 3B43 HDF data files?

The data in the HDF file are written in the following order,
(-49.875, -179.875), (-49.625, -179.875), (-49.375, -179.875), (-49.125, -179.875)......(49.875, -179.875), (-49.875, -179.625), (-49.625, -179.625)......
The dimension for longitude is 1440 and latitude 400. The missing data value is, -9999.9

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