Scott Baker

InSAR Short CourseJuly 21-23, 2014

INTRODUCTION TO SAR DATA ACCESS

Wednesday, July 23, 14

OUTLINE

•Overview of SAR archives

•How to search for SAR data

•How to download SAR data

Wednesday, July 23, 14

SAR ARCHIVES

•UNAVCO

• ASF (Alaska Satellite Facility)

•Geohazards Supersites and Natural Laboratories

Wednesday, July 23, 14

SAR ARCHIVES

UNAVCO:http://www.unavco.org/data/imaging/sar-data/sar-data.html

Data available in the archiveERS-1/2ENVISATRADARSAT-1TerraSAR-X

Data coverage is limited to North AmericaAll data are “raw” Level 0 (SLC for TSX) and are organized into “collections” ESA data from North America can be requested through UNAVCO

Wednesday, July 23, 14

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 data: (Approved CO-PIs at U.S. institutions)Contact PI on proposal: https://winsar.unavco.org/portal/proposals/

If you are an authorized WInSAR data user, you have access to the EarthScope collections

Open

Restricted

Wednesday, July 23, 14

SAR ARCHIVES

ASF:www.asf.alaska.edu/program/sdc/data

Data available in the archiveAIRSARUAVSARAirMOSSSeasatERS-1/2JERS-1RADARSAT-1ALOS PALSAR

Data coverage extends outside North AmericaData available in “raw” (Level 0), SLC, and as detected image products

Wednesday, July 23, 14

SAR ARCHIVES

ASF: How to access dataMuch of the SAR data in the ASF SDC archive is limited in distribution to the United States' 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: (residents of the United States)UPASS proposal submission: https://ursa.asfdaac.alaska.edu/upass/cgi-bin/welcome/guest/

WInSAR members can access data without a UPASS proposal but still need to sign authorization forms (https://ursa.asf.alaska.edu/cgi-bin/dua_form/guest/)

Wednesday, July 23, 14

SAR ARCHIVES

Supersites:supersites.earthobservations.org/eo-virtual-archive4.esa.int/

Data available in the archiveERS-1/2ENVISATRADARSAT-1 (limited)RADARSAT-2 (limited) at UNAVCOALOS PALSAR (limited)TerraSAR-X (limited) at UNAVCOCOSMO-SkyMed (limited) at UNAVCO

Wednesday, July 23, 14

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

Collections at UNAVCO require users to register for an account and contact the PI on the proposal to be added at a Co-Investigator

Wednesday, July 23, 14

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

Wednesday, July 23, 14

SAR SEARCH

•UNAVCO: GUI, Command Line Client, API

• ASF: GUI, API

• Supersites: GUI, API

• SSARA (Seamless SAR Archive) Federated Query: Command Line Client, API

Wednesday, July 23, 14

SAR SEARCH

UNAVCO: Searching for data

GUI: http://facility.unavco.org/SarArchive/flexweb/SearchSarScene.html

Command Line Client:http://facility.unavco.org/data/sar/sar_api_client.html

API:http://facility.unavco.org/data/sar/sar_api.html

DEMONSTRATION

Wednesday, July 23, 14

SAR SEARCH

ASF: Searching for datahttp://www.asf.alaska.edu/program/sdc/data_accesshttps://portal.asf.alaska.edu/

GUI: https://vertex.daac.asf.alaska.edu/https://ursa.asfdaac.alaska.edu/

API:https://portal.asf.alaska.edu/api/

DEMONSTRATION

Wednesday, July 23, 14

SAR SEARCH

Supersites: Searching for data

GUI: eo-virtual-archive4.esa.int/

API:eo-virtual-archive4.esa.int/help.html

DEMONSTRATION

Wednesday, July 23, 14

SAR SEARCH

SSARA: Searching for data

API: http://www.unavco.org/ws/brokered/ssara/sar

Command Line Client: https://github.com/bakerunavco/SSARA

Wednesday, July 23, 14

SAR DOWNLOAD

UNAVCO: GUI: - Click on individual links in the “Results Screen” tab- Select the scenes you want in the “Results Screen” tab, then use the “Download Script” tab

Command Line Client: Provide UNAVCO username and password command line options and data will be downloaded

Wednesday, July 23, 14

SAR DOWNLOAD

ASF: Vertex and URSA GUIs: - Click on individual links in the results - Selects scenes, then get a metalink file to use on the command line

Command Line:- Use metalink file along with Aria2 program to download dataor - Get a CSV file instead of metalink and run the commands belowwget --save-cookies cookies.txt --post-data='user_name=XXXX&user_password=XXXX' --no-check-certificate https://ursa.asfdaac.alaska.edu/cgi-bin/login -o /dev/null -O /dev/nullmore asf-datapool-results-YYYY-mm-dd_HH-MM-SS.csv | awk 'BEGIN{FS=","}{print "wget -c --no-check-certificate --load-cookies=cookies.txt "$26}' > run_downloadsh run_download

Wednesday, July 23, 14

SAR DOWNLOAD

Supersites: GUI: -Click file on left, then click “Access” tab at bottom

Command Line:1. Get the SSO Download program (Java):

http://supersites.earthobservations.org/sso-downloader-0.1.tar.gz2. On the results in GUI, click the “info” icon then the “link” icon3. Use links with the SSOD program

Wednesday, July 23, 14

SAR DOWNLOAD

SSARA: GUI: - Click on individual links in the results table

Command Line Client: - Provide username/password for the various collections to download data

Wednesday, July 23, 14