introduction to sar data access and insar product …

Scott Baker

Advanced InSAR Short CourseJune 29 - July 2, 2015

INTRODUCTION TO SAR DATA ACCESS AND INSAR

PRODUCT ARCHIVE

Thursday, July 2, 15

OUTLINE

• Overview of SAR archives: UNAVCO, ASF, GSNL

• Search and download SAR data with SSARA

Thursday, July 2, 15

SAR ARCHIVES

• UNAVCO

• Alaska Satellite Facility (ASF)

• Geohazards Supersites and Natural Laboratories (GSNL)

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15

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

Thursday, July 2, 15