Satellite Dataset for land data assimilation (ALOS > PALSAR)


1. IDENTIFICATION INFORMATION

Name Satellite Dataset for land data assimilation (ALOS > PALSAR)
Metadata Identifier ALOS_PALSAR_ORTHO_Rivers20230727092607-en

2. CONTACT

2.1 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

2.2 CONTACT on PROJECT

3. DOCUMENT AUTHOR

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

4. DATASET CREATOR

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

5. DATE OF THIS DOCUMENT

2023-07-27

6. DATE OF DATASET

  • creation : 1997-03-31

7. DATASET OVERVIEW

7.1 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 (θlocal) 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(θlocal).

7.2 Topic Category(ISO19139)

  • inlandWaters

  • geoscientificInformation

7.3 Temporal Extent

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

7.4 Geographic Bounding Box

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

7.5 Grid

7.6 Geographic Description

7.7 Keywords

7.7.1 Keywords on Dataset

Keyword Type Keyword Keyword thesaurus Name
theme Earth Observation Satellites > ALOS GCMD_platform
theme Disasters, Water GEOSS

7.7.2 Keywords on Project

7.9 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.

7.10 Distribution Information

name version specification

8. DATA PROCESSING

9. DATA REMARKS

10. DATA POLICY

10.1 Data Policy by the Data Provider

10.2 Data Policy by the Project

11. LICENSE

12. DATA SOURCE ACKNOWLEDGEMENT

12.1 Acknowledge the Data Provider

12.2 Acknowledge the Project

13. 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).