To find already archived data, and download data now from this archive, go to the Numerical Search Tool or the map-based SAR Archive Search Interface. You must be a WInSAR Data User. For details about using the numeric search tool, see below.

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

To order ESA scenes to add to the archive, use the SAR archive search and ordering tool.

To find and order Envisat scenes, you can also use ESA'S EOLI-SA to make a 'shop cart,' and submit the Eoli 'shop cart' file to UNAVCO. In some cases this is the best way to order non-I2 Envisat frames or swaths of any kind. Also, specifications for some I2 frames are not in the UNAVCO database to select from. See How to use EOLI_SA.

See "Ordering ALOS Scenes" in ALOS PALSAR Data. ALOS PALSAR data is not stored at the UNAVCO WInSAR archive.

The numerical SAR Archive Search 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.

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.