Alaska Satellite Facility
Delivering Remote Sensing Data Since 1991

A Great Way to Find Lots of Data

A Sentinel-1 synthetic aperture radar (SAR) image shows part of Alaska's mountainous, glacier-rich Kenai Peninsula.Copernicus Sentinel data 2014

 Start Here

Learn by doing! Try the interactive API pane for instant results. Choose keywords and copy commands to your own scripts. 

 API Basics

Overview, with a streamlined guide to building a command and to searching, visualizing, and downloading data.

 Build API Command

Step-by-step instructions to building the three parts of an API command. For beginners and everyone else.

Quick Guide for Power Users

API URL: https://api.daac.asf.alaska.edu/services/search/param?keyword=value\&...

Keywords: See the Learn by Doing page for a full list of keywords.

Output: Default output format is metalink; users can also specify CSV or KML. JSON output is available but only returns a small number of fields.

Authenticate* and Download: Linux/Mac Examples
Aria2 - Download Known Granule
    aria2c --http-auth-challenge=true --http-user=CHANGE_ME --http-passwd='CHANGE_ME' "https://api.daac.asf.alaska.edu/services/search/param?granule_list=S1A_EW_GRDM_1SDH_20151003T040339_20151003T040351_007983_00B2A6_7377&output=metalink"
Aria2 - Download Based on Platform & Time-Range Search
aria2c --http-auth-challenge=true --http-user=CHANGE_ME --http-passwd='CHANGE_ME' "https://api.daac.asf.alaska.edu/services/search/param?platform=Sentinel-1A&intersectsWith=point(-122.425 37.77)&start=2016-07-01T00:00:00&output=metalink"
Wget - Download Known Metalink
wget -c --http-user=CHANGE_ME --http-password='CHANGE_ME' "https://datapool.asf.alaska.edu/GRD_MD/SA/S1A_EW_GRDM_1SDH_20151003T040339_20151003T040351_007983_00B2A6_7377.zip"


*Use Earthdata username and password

Get SAR Data

Get SAR Data

Select and download SAR data online using Vertex.

Use the ASF API for downloading SAR data via a command line.