| |
| Name | Satellite Dataset for land data assimilation (ALOS-2 > PALSAR-2) |
| Metadata Identifier | ALOS2_PALSAR2_ORTHO_Rivers20230727092647-en |
| Name | JAXA DIAS representative |
|---|---|
| Organization | Japan Aerospace Exploration Agency (JAXA) |
| TEL | +81 50 3362 3064 |
| dias at ml dot jaxa dot jp |
| Name | JAXA DIAS representative |
|---|---|
| Organization | Japan Aerospace Exploration Agency (JAXA) |
| dias at ml dot jaxa dot jp |
| Name | JAXA DIAS representative |
|---|---|
| Organization | Japan Aerospace Exploration Agency (JAXA) |
| dias at ml dot jaxa dot jp |
creation : 2017-03-31
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 (Ælocal) 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(Ælocal).
geoscientificInformation
inlandWaters
| Begin Date | 2014-05-24 |
| End Date | Under Continuation |
| North bound latitude | 34.5 |
| West bound longitude | 69 |
| Eastbound longitude | 121.5 |
| South bound latitude | -8.4 |
| Keyword Type | Keyword | Keyword thesaurus Name |
|---|---|---|
| theme | Disasters, Water | GEOSS |
[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.
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).