4.2. AHI Himawari Standard Data (HSD) Reader

The AHI HSD Reader operates on standard files from the Japan Meteorological Agency (JMA) Himawari-8 Advanced Himawari Imager (AHI) instrument. The AHI 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 Reflectance Band

B02

Channel 2 Reflectance Band

B03

Channel 3 Reflectance Band

B04

Channel 4 Reflectance Band

B05

Channel 5 Reflectance Band

B06

Channel 6 Reflectance Band

B07

Channel 7 Brightness Temperature Band

B08

Channel 8 Brightness Temperature Band

B09

Channel 9 Brightness Temperature Band

B10

Channel 10 Brightness Temperature Band

B11

Channel 11 Brightness Temperature Band

B12

Channel 12 Brightness Temperature Band

B13

Channel 13 Brightness Temperature Band

B14

Channel 14 Brightness Temperature Band

B15

Channel 15 Brightness Temperature Band

B16

Channel 16 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

4.2.1. Command Line Usage

usage: geo2grid.sh -r ahi_hsd -w <writer> [-h]

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