satpy.readers.fci_base module

Common functionality for FCI data readers.

satpy.readers.fci_base.calculate_area_extent(area_dict)

Calculate the area extent seen by MTG FCI instrument.

Since the center of the FCI grids is located at the interface between the pixels, there are equally many pixels (e.g. 5568/2 = 2784 for 2km grid) in each direction from the center points. Hence, the area extent can be easily computed by simply adding and subtracting half the width and height from teh centre point (=0).

Parameters:

area_dict – A dictionary containing the required parameters ncols: number of pixels in east-west direction nlines: number of pixels in south-north direction column_step: Pixel resulution in meters in east-west direction line_step: Pixel resulution in meters in south-north direction

Returns:

An area extent for the scene defined by the lower left and

upper right corners

Return type:

tuple