blue arrow Instrument Overview

ERS-1 instruments

The ERS-1 satellite, launched on 17 July 1991, carried a Synthetic Aperture Radar (SAR). It operated in parallel with another instrument – the Wind Scatterometer (WS). Together the SAR/WS configuration was called the Active Microwave Instrument (AMI). AMI had three modes of operation, which allowed the instruments to image land during day or night or through clouds.

The ERS-1 mission ended on 10 March 2000, far exceeding its expected lifespan.


blue arrow Data

blue arrow DATA DOWNLOAD

Download data from the ERS-1 SAR mission through the ESA Online Dissemination System. The data is freely available to registered users.


All ERS-1 SAR products, in accordance with ESA Earth Observation Data Policy, are freely available to users. These include:

RAW, IMP and SLC data are provided in CEOS format produced using the ESA PGS-ERS processor. All products can be provided in an Envisat product format, provided by the ESA PF-ASAR processor.

Download the ERS products specification with Envisat format

blue arrow DATA TOOLS

Tools available for visualising, processing and analysing ERS-1 data:

Sentinel-1 Toolbox

The Sentinel-1 Toolbox (S1TBX) consists of a collection of processing tools, data product readers and writers and a display and analysis application to support the large archive of data from ESA SAR missions including Sentinel-1, ERS-1 & 2 and Envisat.

Read more

Sentinel Application Platform

The Sentinel Application Platform (SNAP) is a common architecture for all Sentinel Toolboxes. It is ideal for Earth Observation processing and analysis due to technological innovations.

Read more

blue arrow Auxiliary Data

Auxiliary data from ground or airborne sources is sometimes used to help produce data products. Auxiliary data files for ERS-1 SAR data products are available to download.

Read more

blue arrow Cal/Val

The goal of SAR calibration and validation activities was to verify the accuracy and quality of data the instrument acquired. Details are available of the ERS-1 SAR Cal/Val plan and of Calibration Activities.