introduction to sar data access and insar product …
TRANSCRIPT
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Scott Baker
Advanced InSAR Short CourseJune 29 - July 2, 2015
INTRODUCTION TO SAR DATA ACCESS AND INSAR
PRODUCT ARCHIVE
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OUTLINE
• Overview of SAR archives: UNAVCO, ASF, GSNL
• Search and download SAR data with SSARA
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SAR ARCHIVES
• UNAVCO
• Alaska Satellite Facility (ASF)
• Geohazards Supersites and Natural Laboratories (GSNL)
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SAR ARCHIVES
UNAVCO:http://www.unavco.org/data/imaging/sar-data/sar-data.html
Data available in the archiveERS-1/2ENVISATRADARSAT-1TerraSAR-X and ALOS-2
Data coverage is limited to North AmericaAll data are “raw” Level 0 (SLC for TSX, ALOS-2) and are organized into “collections” ESA data from North America can be requested through UNAVCO
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SAR ARCHIVES
UNAVCO: How to access dataAll data access requires submission of data use agreement(s)
WInSAR data: (Full or Adjunct I Institutional Member of WInSAR) Institution membership: https://winsar.unavco.org/apply_im.htmlAuthorized data user : https://winsar.unavco.org/apply_du.html
TerraSAR-X and ALOS-2 data: (Approved CO-PIs)Contact PI on TSX proposal: https://winsar.unavco.org/portal/proposals/Contact PI on ALOS-2 proposal: https://winsar.unavco.org/portal/jaxaproposals/
If you are an authorized WInSAR data user, you have access to the EarthScope collections
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SAR ARCHIVESSupersites:supersites.earthobservations.org/eo-virtual-archive4.esa.int/https://supersites.eoc.dlr.de/
Data available in the archiveERS-1/2 (ESA VA4)ENVISAT (ESA VA4)RADARSAT-1 (limited)RADARSAT-2 (limited) at UNAVCOALOS PALSAR (limited)TerraSAR-X (at DLR)COSMO-SkyMed (limited) at UNAVCO
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SAR ARCHIVES
Supersites: How to access data
All data access to Virtual Archive 4 data requires an EO Single Sign On username/password
https://eo-sso-idp.eo.esa.int/idp/AuthnEngine
DLR Supersites archive requires a self registration:
https://supersites.eoc.dlr.de/
Collections at UNAVCO require users to register for an account and contact the PI on the proposal to be added at a Co-Investigator
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SAR ARCHIVES
ASF:www.asf.alaska.edu/program/sdc/dataData available in the archiveAIRSARUAVSARAirMOSSSeasatERS-1/2JERS-1RADARSAT-1ALOS PALSAR Sentinel-1 (soon to be released)
Data coverage extends outside North AmericaData available in “raw” (Level 0), SLC, and as detected image products
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SAR ARCHIVES
ASF: How to access dataMuch of the SAR data in the ASF SDC archive is limited in distribution to the U.S. scientific research community and U.S. Government Agencies
AIRSAR and UAVSAR: (Anyone)Register for a user account at ASF
ERS-1/2, JERS-1, RADARSAT-1: (residents of the United States) NASA 2-page proposal: http://www.asf.alaska.edu/program/sdc/nasa_proposal_guidelines
ALOS:Now open, users just need to accept the license agreement within Vertex or URSA
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SAR ARCHIVES
SUMMARY
-UNAVCO: ERS-1/2, RADARSAT-1, ENVISAT, TerraSAR-X (Limited to North America)Some Supersites data (CSK, RSAT-2, TSX)
-ASF:AIRSAR, UAVSAR, AirMOSS, Seasat, ERS-1/2, JERS-, RADARSAT-1, ALOS PALSARMostly North and South America but also a lot outside NA/SA
-Supersites:ERS-1/2 and ENVISAT, Various coverage areas all around the globeRSAT-1/2, ALOS-1, TerraSAR-X, COSMO-SkyMed Limited to Supersites and Natural Laboratory locations
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SSARA APISearching for dataWeb Service Root URL: http://web-services.unavco.org/brokered/ssara/
Command Line Client and Utilities: https://github.com/bakerunavco/SSARA- Automated downloads from UNAVCO, ASF, and ESA Virtual Archive 4 (via secp)- HDF5 converter for InSAR product archive- DEM converted for ROI_PAC and ISCE
New web GUI for searching
git clone https://github.com/bakerunavco/SSARA.git
http://web-services.unavco.org/brokered/ssara/gui2.0
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SSARA Example
ssara_federated_query.py -‐p ALOS -‐-‐processingLevel=L1.1 -‐r 287 -‐f 380 -‐a 1784,25940 -‐-‐print -‐-‐demRunning SSARA API QuerySSARA API query: 0.716565 secondsFound 2 scenesScenes after filtering for monthMin 1 and monthMax 12: 2
wget -O dem.tif "http://ot-data1.sdsc.edu:9090/otr/getdem?north=19.925000&south=18.908000&east=-154.779000&west=-155.833000&demtype=SRTM30"gdal_translate -projwin -155.833000 19.925000 -154.779000 18.908000 srtmgl1.vrt dem.tif
ASF-A3-FBS,ALOS,1784,2006-05-26 08:47:01,2006-05-26 08:47:11,287,380,380,FBS,3,ASCENDING,R,HH,http://archive.daac.asf.alaska.edu:80/L1.1/A3/ALPSRP017840380-L1.1.zipASF-A3-FBS,ALOS,25940,2010-12-07 08:48:03,2010-12-07 08:48:11,287,380,380,FBS,3,ASCENDING,R,HH,http://archive.daac.asf.alaska.edu:80/L1.1/A3/ALPSRP259400380-L1.1.zip
ssara_federated_query.py -‐p ALOS -‐-‐processingLevel=L1.1 -‐r 287 -‐f 380 -‐a 1784,25940 -‐-‐download -‐-‐parallel=2Running SSARA API QuerySSARA API query: 3.281685 secondsFound 2 scenesScenes after filtering for monthMin 1 and monthMax 12: 2Downloading data now, 2 at a time.ALPSRP259400380-L1.1.zip already downloadedASF Download: ALPSRP017840380-L1.1.zipALPSRP017840380-L1.1.zip download time: 25.97 secs (30.57 MB/sec)
ALOS-1 SLCs for ISCE Hands-On Session
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WInSAR Portal - InSAR Wiki
https://winsar.unavco.org/portal/wiki/WikiIndex/
This new wiki will replace the old roipac.org wiki
•Support pages for ROI_PAC, GMTSAR, ISCE
•Other software, possibly Doris and Sentinel Toolbox
•Advanced techniques: Time series analysis, MAI, pixel tracking
Improvements and added functionality will be implemented as funding and time allows
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InSAR Product Archive
Developed under the SSARA project to provide a community-contributed InSAR archive for interferograms, time series, and other derived data products.
https://winsar.unavco.org/portal/insar
•HDF5 format is used for the data products (HDF-EOS5 in progress). Example converters for ROI_PAC and GMTSAR provided on SSARA GitHub repository
•REST interface for uploading interferograms (LOS velocities and LOS time series support in development) https://winsar.unavco.org/portal/insar/api/
•Data can be uploaded from the command line using cURL:curl -i -F data_file=@DATA_FILENAME -u USERNAME:PASSWORD https://winsar.unavco.org/portal/insar/api/interferometry/
Users only need to provide the "data_file" parameter via POST method along with their login credentials since all necessary metadata is read from the HDF5 file directly.
HDF5 Format
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InSAR Product Archive
DOI Request:On the product page, there is a “Request a DOI” button
Once DOI is minted, the products are permanently in the archive
DOI links to the WInSAR portal product pagehttp://dx.doi.org/10.7283/S21596
Users can view their uploaded products and assigned DOIs:
https://winsar.unavco.org/portal/insar/mine
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