Alaska Satellite Facility
Delivering Remote Sensing Data Since 1991

Types of Synthetic Aperture Radar (SAR) Products

New users may prefer to start with imagery and products derived from imagery. These products are given processing-level numbers, such as L1 and L2. Raw, unprocessed data, is L0 or L1.0.

TypeLevelPresentationTools to ViewTool Source

Raw Data

L0, L1.0, Raw

User must processUnfocusedn/a

Single look complex

L1.1, SLCFocused but much speckle

Contains phase information.

Used for InSAR

n/a

Imagery

L1, L1.5*

Ground Range Detected (GRD)

Viewable image

ASF View/ MapReady

ESA Sentinel Toolbox (S1TBX)

ASF, no cost to users

ESA, no cost to users

Imagery

Corrected imagery

GeoTIFF

GeoTIFF RTC*

Viewable Image

ArcGIS, QGIS

Note: Dark RTC images may require conversion from gamma0 to sigma0 in GIS for best viewing. Instructions.

ArcMap - commercial, QGIS - free
Product derived from imagesL2 - OCNUsually a viewable image or plotUsually nonen/a

*Radiometrically terrain corrected (RTC) is corrected L1.5 imagery.

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.