Advanced Himawari Imager (AHI) gridded format data reader.
This data comes in a flat binary format on a fixed grid, and needs to have calibration coefficients applied to it in order to retrieve reflectance or BT. LUTs can be downloaded at: ftp://hmwr829gr.cr.chiba-u.ac.jp/gridded/FD/support/
This data is gridded from the original Himawari geometry. To our knowledge, only full disk grids are available, not for the Meso or Japan rapid scans.
- AHI gridded data website:
- class satpy.readers.ahi_l1b_gridded_bin.AHIGriddedFileHandler(filename, filename_info, filetype_info)
AHI gridded format reader.
This data is flat binary, big endian unsigned short. It covers the region 85E -> 205E, 60N -> 60S at variable resolution: - 0.005 degrees for Band 3 - 0.01 degrees for Bands 1, 2 and 4 - 0.02 degrees for all other bands. These are approximately equivalent to 0.5, 1 and 2km.
Files can either be zipped with bz2 compression (like the HSD format data), or can be uncompressed flat binary.
Initialize the reader.
- calibrate(data, calib)
Calibrate the data.
Get the area definition.
This is fixed, but not defined in the file. So we must generate it ourselves with some assumptions.
- get_dataset(key, info)
Get the dataset.
- read_band(key, info)
Read the data.