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How to order SAR scenes to add to the UNAVCO WInSAR archive

To order ERS scenes to add to the archive, use the request ERS ordering tool online here.

To find and order Envisat scenes, use ESA'S EOLI-SA and submit the Eoli 'shop cart' file to UNAVCO.
See How to use EOLI_SA.

To find and order ALOS scenes, use JAXA's AUIG (ALOS User Interface Gateway)
(use guest login) and save the '.csv' file.

How to find data for SAR scenes in the UNAVCO WInSAR archive

To find already archived data, and download data now from this archive, go to Search Archive.

For more details, see:

Numeric Search for WInSAR Data

Map Search for WInSAR Data

Numeric/Map Search Service Interface

Search Results Tables

Related topics

Uncataloged Data

How to use EOLI_SA

Fast Data Download Client

Numeric Search

The Numeric Search on the "Search archive" web page allows you to find data for SAR scenes from ERS, Envisat, and ALOS in the WInSAR archive, and download data files with your web browser, one scene(file) at a time.

The Search tool data has several search options, including mission (sensor), track orbit and frame,
spatial searches, and temporal searches. You can search on values of any or all of the following:

Geographic area searches:
- the "Centered" search, in a box, centered on a specified latitude and longitude. The box's half-width, entered as kilometers,
  is used to make a rectangular area search box in latitude-longitude.
- or by Latitude range (north latitudes are positive, south latitudes are negative)
- and Longitude range (east longitudes are positive, west longitudes are negative)
Dates
Track
Frame
Orbit
Mission (satellite)

Enter the values describing your selection and click the "Submit Search" button near the bottom of the page.
You can choose most any combination of criterion, but you must choose a Mission(satellite) and a download location.

Note that only the UNAVCO archive has the all the ESA data obtained for WInSAR.
Choose UNAVCO for "Download Location," or use location ASF for ALOS data files.

To search for scene pairs for interferometry based on baseline values, do a search for the time, area and sensor of interest. In each row in the result table, click on the link in the "baselines" column which will show you a table of paired scenes for ERS1 or ERS2 with baseline values.

More instructions are below in the Search Results Table section.

Map Search

The Map Search allows a user to search for only ERS scenes by choosing points or areas on a map.
The map search works with the numeric search tool. When you draw a box on the map, the corresponding ERS track and frame numbers appear in the Numeric Search.
Toolbar Description:

Shift View - this mode allows you to pan around the map by dragging it, as you would a .pdf document in Adobe Acrobat. To be able to do this, you cannot be at the outermost zoom level (i.e., you must have zoomed in at least once).

Select Region - this mode allows you to select a group of points on the map. Drag the mouse pointer to make a rubber-band box. Doing so should fill in the track and frame ranges corresponding to your track and frame ranges.

Zoom In - enlarge an area of the map

Zoom Out - view more of the map at once

Select All - select all map points

Select None - deselect all map points

Numeric/Map Search Service

The WInSAR web site search service, which allows you to specify numeric and map criteria simultaneously, looks like this:

After specifying all the map and/or numerical criteria that you want the returned entries to satisfy, click "Search Archive" to run the query.

Search Results Table

A table similar to the one above should be returned. The "Get Data" column contains links to the actual data files. Click on a link to start a download. You must be a registered WInSAR data user with a password to download data.
For the entries whose "preview" column contains a thumbnail image, you can view the full-size image in a separate window by clicking on the thumbnail.

Baseline values are available for ERS1 and ERS2 scenes. In the table you will see the right column "sample baselines". This column is merely a sample of many possible baseline values. It was in the code and data that UNAVCO inherited and appears to be a random sample.
You can see more baseline values for a scene by clicking on the link in the column "baselines." This opens a window to get real-time baseline values from the ESA database.
To search for scene pairs for interferometry, based on baseline values, do a search for the time, area and sensor of interest. In each row in the result table, click on the link in the "baselines" column which will show you a table of paired scenes for ERS1 or ERS2 with baseline values.
Baseline values are available for ERS scene pairs, not Envisat.
To sort by a category, click the category name at the top of the table. Note that this will sort all the entries that were returned, not just the entries on the current page. You'll automatically be sent to page 1 after re-ordering the results, so that you're looking at the entries with the highest values in the category you just sorted by.

ALOS search results table:

Uncataloged Data

Some SAR scene data is uncataloged because it does not fit into the WInSAR archive database as presently designed, for example, ALOS scenes. The data files are available on the Ancillary Data web page. See the sections "Uncataloged Envisat wide swath raw data files," "Uncataloged ALOS Data," "Uncataloged Yellowstone RADARSAT data files" and others. Click on the links to see the files or the directories named for the track number such as T392 where the files are. Use your browser to download one file at a time. Only WInSAR data users have access to these files.

Fast Data Download Client

For help with the fast download client, please see the WInSAR Software section of this website.
UNAVCO does not support the Fast Data Download client.