GCOM-C SGLI RSP Path Detection in L2 Tile Tool User’s Manual Version 1.0 Nov.
User’s Manual Change Records (1/1) Ver. Rev. Date 1.0 - Nov.
Contents 1． Introduction ........................................................................................ 1 2． System Requirements ....................................................................... 1 3． Input Products / Available Datasets ................................................. 1 4． Operation ............................................................................................ 2 5． Output Files ....................................................................................
User’s Manual Version 1.0, Nov. 2022 1． Introduction This user’s manual explains how to use the tool for “RSP Path Detection in L2 Tile of GCOM-C/SGLI HDF5 products”. This tool detects the number of RSP-path for raster data in the L2-tiles on a daily basis (01D) based on the observing time and attaches it to the original filename. If the tile includes multiple RSP paths, the tool separates the tile for each of the paths and outputs their corresponding multiple HDF5 files.
User’s Manual Version 1.0, Nov. 2022 If the target tile has the resolution of 250 m (Q), the reference LTOA/RSRF should be the same resolution. If the tile includes multiple RSP paths, the tool separates the data for each of the paths. The target data for the separation are all raster datasets, which the size is 4800 x 4800 or 1200 x 1200, in the HDF Group of the Image_data and the Geometry_data. The details of the datasets in the L2-tile products can be found at: https://suzaku.eorc.jaxa.
User’s Manual Version 1.0, Nov. 2022 5． Output Files The output file is the HDF5 with the number of RSP path attached in the filename. If the tile includes multiple RSP paths, the multiple files for each of the paths are separately output. 5.1 File naming The rules of naming for output files are as follows: GID_PPP.h5 where, GID is the Granule ID of an input HDF product, PPP is the number of the RSP paths (001~485). Example: GC1SG1_20220627D01D_T0427_L2SG_LTOAQ_2012_039.
User’s Manual Version 1.0, Nov. 2022 6． License information The tool includes the open-source libraries for the file interface of the HDF5. The license information is as follows: Copyright Notice for HDF5 (Hierarchical Data Format 5) Software Library ======================================================== HDF5 (Hierarchical Data Format 5) Software Library and Utilities Copyright (c) 2006-2018, The HDF Group.
User’s Manual Version 1.0, Nov. 2022 7． Appendix 7.1 The detection of the number of RSP-path This section briefly explains the algorithm for the detection of the number of RSP-path. The number of RSP-path is detected from the dataset of Geometry_data/Obs_time, which gives the time from the epoch of UT00:00 at the date of the Granule ID, by using the nominal parameters of the satellite orbit.
User’s Manual Version 1.0, Nov. 2022 𝑖𝑖𝐴𝐴𝐴𝐴 = 𝑖𝑖𝑖𝑖𝑖𝑖 � 𝑖𝑖𝑑𝑑 + (𝑖𝑖𝑑𝑑0 − 𝑖𝑖𝑅𝑅𝑅𝑅𝑅𝑅 ) � ∙ 𝑖𝑖𝑂𝑂𝑅𝑅𝑂𝑂 + 𝑖𝑖𝑅𝑅𝑅𝑅𝑅𝑅 𝑖𝑖𝑂𝑂𝑅𝑅𝑂𝑂 The t d-AN is used to check the miss-detection, where it implies the relative position from the equator, while the tile ID indicates the hemisphere of north or south. For tiles of the northern hemisphere in ascending tiles (i.e., tile ID = T00**~T08**), if the t d-AN is greater than a threshold T N , the number of RSP-path is detected being shifted backward and is added by N.
User’s Manual Version 1.0, Nov. 2022 7.2 GeoTIFF conversion with the external tool The output HDF5 files of this tool can be converted into GeoTIFF format files with the external tool "Map projection & GeoTIFF conversion Tool." A sample shell script in the Bash at Linux OS that implements the procedure is as follows: #-----------------------------------------------------------#!/bin/bash #set the input file and output directory file="GC1SG1_20220627D01D_T0427_L2SG_LTOAQ_2012.h5" outdir=".
