Satellite Dataset for land data assimilation (ALOS-2 > PALSAR-2)


IDENTIFICATION INFORMATION

Name Satellite Dataset for land data assimilation (ALOS-2 > PALSAR-2)
Metadata Identifier ALOS2_PALSAR2_ORTHO_Rivers20181216225524-en

CONTACT

CONTACT on DATASET

Name JAXA DIAS representative
Organization Japan Aerospace Exploration Agency (JAXA)
TEL +81 50 3362 3064
E-mail dias at ml dot jaxa dot jp

DOCUMENT AUTHOR

Name JAXA DIAS representative
Organization Japan Aerospace Exploration Agency (JAXA)
E-mail dias at ml dot jaxa dot jp

DATASET CREATOR

Name JAXA DIAS representative
Organization Japan Aerospace Exploration Agency (JAXA)
E-mail dias at ml dot jaxa dot jp

DATE OF THIS DOCUMENT

2018-12-16

DATE OF DATASET

  • creation : 2017-03-31

DATASET OVERVIEW

Abstract

This data set is time sries of radar images of major river basin in South Ease Asia, which are produced for land data assimilation. They were observed by PALSAR-2 mounted on ALOS-2 that was developed by JAXA. The data consists of orthorectified gamma-naught images with and without slope-correction and local incidence angle (Įlocal) images processed by Sigma-SAR.

The digital number (DN) of the image can be converted to the Normalized Radar Cross Section (gamma-naught, sigma-naught) using the following equation,

Gamma-naught (dB) = 10*log10(DN^2)-83,

Sigma-naught = Gamma-naught*cos(Įlocal).

Topic Category(ISO19139)

  • geoscientificInformation

  • inlandWaters

Temporal Extent

Begin Date 2014-05-24
End Date Under Continuation

Geographic Bounding Box

North bound latitude 34.5
West bound longitude 69
Eastbound longitude 121.5
South bound latitude -8.4

Keywords

Keywords on Dataset

Keyword Type Keyword Keyword thesaurus Name
theme Disasters, Water GEOSS

Data Environmental Information

[Data format]: Geotiff [Filename rules]: Orthocorrected image: yyyymmdd_AAAA_BBBDDD_E_FFFFFF_GG.tif Orthocorrected and slope-corrected image: yyyymmdd_AAAA_BBBDDD_E_FFFFFF_sl_GG.tif Local incidence angle image: yyyymmdd_AAAA_BBBDDD_E_FFFFFF_linci.tif yyyymmdd: Observation date AAAA: Satellite name 'ALOS1':ALOS-1 'ALOS2':ALOS-2 BBB: Beam Mode 'FBD': Fine Beam Dual (ALOS-1) 'WB1': ScanSAR nominal mode (ALOS-1) 'WBD': Wide Beam Dual (ALOS-2) DDD: Off-nadir angle E : Ascending/Descending 'A':Ascending orbit 'D':Descending orbit FFFFFF: RSP path number [Radiometric conversion]: Digital Number is converted to gamma-naught by the following equation. Gamma-naught (dB) = 10*alog10(DN^2)-83.

REFERENCES

M. Shimada, Ortho]Rectification and Slope Correction of SAR Data Using DEM and Its Accuracy Evaluation. IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens. 3, 657–671 (2010).


Copyright(c) 2006-2018 Data Integration & Analysis System (DIAS) All Rights Reserved.
This project is supported by "Data Integration & Analysis System" funded by MEXT, Japan
Copyright © 2009-2019 DIAS All Rights Reserved.