4.5. AHI Himawari Standard Data (HSD) Reader

The AHI HSD Reader operates on standard files from the Japan Meteorological Agency (JMA) Himawari-8 and Himawari-9 Advanced Himawari Imager (AHI) instrument. The AHI Himawari Standard Data (HSD) reader works off of the input filenames to determine if a file is supported by Geo2Grid. Files usually have the following naming scheme:

HS_H08_20181022_0300_B09_FLDK_R20_S1010.DAT

These are the mission compliant radiance file naming conventions used by JMA. The AHI HSD reader supports all instrument spectral bands, identified in Geo2Grid as the products shown in the table below. The AHI HSD reader can be provided to the main geo2grid.sh script using the -r option and the reader name ahi_hsd.

The list of supported products includes true and natural color imagery. These are created by means of a python based atmospheric Rayleigh scattering correction algorithm that is executed as part of the Geo2Grid AHI HSD reader, along with sharpening to the highest spatial resolution. For more information on the creation of RGBs, please see the RGB section.

Product Name	Description
B01	Channel 1 (0.47um) Reflectance Band
B02	Channel 2 (0.51um) Reflectance Band
B03	Channel 3 (0.64um) Reflectance Band
B04	Channel 4 (0.86um) Reflectance Band
B05	Channel 5 (1.6um) Reflectance Band
B06	Channel 6 (2.3um) Reflectance Band
B07	Channel 7 (3.9um) Brightness Temperature Band
B08	Channel 8 (6.2um) Brightness Temperature Band
B09	Channel 9 (6.9um) Brightness Temperature Band
B10	Channel 10 (7.3um) Brightness Temperature Band
B11	Channel 11 (8.6um) Brightness Temperature Band
B12	Channel 12 (9.6um) Brightness Temperature Band
B13	Channel 13 (10.4um) Brightness Temperature Band
B14	Channel 14 (11.2um) Brightness Temperature Band
B15	Channel 15 (12.4um) Brightness Temperature Band
B16	Channel 16 (13.3um) Brightness Temperature Band
true_color	Ratio sharpened rayleigh corrected true color
natural_color	Ratio sharpened rayleigh corrected natural color
airmass	Air mass RGB
ash	Ash RGB
dust	Dust RGB
fog	Fog RGB
night_microphysics	Night Microphysics RGB

4.5.1. Command Line Usage

usage: geo2grid.sh -r ahi_hsd -w <writer> [-h] [--mask-space | --no-mask-space]

4.5.1.1. AHI HSD Reader

--mask-space, --no-mask-space

Mask space pixels.

Default: True

Examples:

geo2grid.sh -r ahi_hsd -h

geo2grid.sh -r ahi_hsd -w geotiff --list-products -f /ahi8/data/

geo2grid.sh -r ahi_hsd -w geotiff -f HS_H08_20181112_2330_B01_R301_R10_S0101.DAT

geo2grid.sh -r ahi_hsd -w geotiff -p B02 B03 B04 B05 B06 true_color --num-workers 8 -f /data/hsd/2330/*FLDK*.DAT

geo2grid.sh -r ahi_hsd -w geotiff -p B09 B10 B11 B12 B13 natural_color -f /ahi8/HS_H08_20181112_2330_*R303*.DAT

geo2grid.sh -r ahi_hsd -w geotiff --ll-bbox 125 -15 160 10 -f /data/hsd/*FLDK*.DAT

geo2grid.sh -r ahi_hsd -w geotiff -p true_color natural_color --num-workers 4 \
    --grid-configs=/geo/my_grid.conf -g perth --method nearest -f /data/hsd/*FLDK*.DAT