Because of a change in geostationnary projection of GOES data, according to SATMOS
NetCDF distribution, there are 2 directories for GOES-1280 L1B data navigation files.

But as there are no GOES-1280 data before 2018-11-05, there are no Icare GeoL1B
v1.04 or SATMOS FIS data. So, C1 directory is empty, but present for uniformity purpose.

- C0: unsymetric projection grid; the projection center (latitude: 0.0°, longitude:
  128.0°W) is located at the center of 1403th row and column. 
  Files in C0 directory are intented to be used ONLY WITH Icare GeoL1B (HDF) v1.06
  (or newer) or SATMOS files distributed under NetCDF format, but NOT WITH Icare
  GeoL1B (HDF) v1.05 (or older) or SATMOS files distributed under FIS format.

- C1:   symetric projection grid; the projection center (latitude: 0.0°, longitude:
  128.0°W) is located at the center of the grid.
  Files in C1 directory are intented to be used ONLY WITH Icare GeoL1B (HDF) v1.05
  (or older) or SATMOS files distributed under FIS format, but NOT WITH Icare GeoL1B
  (HDF) v1.06 (or newer) or SATMOS files distributed under NetCDF format.