Satellite Dataset for land data assimilation (ALOS > PALSAR)


IDENTIFICATION INFORMATION

Name Satellite Dataset for land data assimilation (ALOS > PALSAR)
Metadata Identifier ALOS_PALSAR_ORTHO_Rivers20181216225445-en

CONTACT

CONTACT on DATASET

Name JAXA DIAS representative
Organization Japan Aerospace Exploration Agency (JAXA)
Address 2-1-1, Sengen, Tsukuba, Ibaraki, 305-8505, Japan
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 : 1997-03-31

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 mounted on ALOS that was developed by JAXA. The data consists of orthorectified gamma-naught images with and without slope-correction and local incidence angle (ƒÆlocal) 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)

  • inlandWaters

  • geoscientificInformation

Temporal Extent

Begin Date 2010-01-01
End Date 2011-05-12

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 Earth Observation Satellites > ALOS GCMD_platform
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 (DN) 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).


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