Model of a Sentinel 1 (radar antenna missing)
Operator European Space Agency
Applications Land and sea monitoring, natural disasters mapping, sea ice observations, ships detection
Spacecraft type Satellite
Constellation 2
Design life 7 years
Launch mass 2300 kg
Dimensions 3.9 metres by 2.6 metres by 2.5 metres (13 ft × 8.5 ft × 8.2 ft)
Power 5.9 kilowatts (5,900 W)[2]
Batteries 324 Ah
Status Active
Built 1
On order 2
Launched 1
Operational 1
First launch Sentinel-1A
3 April 2014[3]
Last launch Sentinel-1B
Related spacecraft
Subsatellite of Copernicus Programme

Sentinel-1 is a space mission funded by the European Union and carried out by the ESA within the Copernicus Programme, consisting of a constellation of two satellites. The payload of Sentinel-1 is a Synthetic Aperture Radar in C-band that provides continuous imagery (day, night and all weather).

On 12 March 2010, the European Space Agency and Thales Alenia Space signed a contract worth €270 million to build the second satellite of the Sentinel-1 pair.

First Sentinel 1A arrived at launch site in Kourou, French Guiana on 25 February.[4] Sentinel-1A satellite was launched on 3 April 2014, by a Soyuz Rocket.[5]


  • Instruments 1
  • Applications 2
  • Industrial 3
  • References 4
  • External links 5


Sentinel-1 spacecraft are designed to carry a single C-band SAR, data storage capacity of 1,410 Gbit and 520 Mbit/s X-band downlink capacity.


Sentinel-1 will provide continuity of data from ERS and Envisat missions, with further enhancements in terms of revisit, coverage, timeliness and reliability of service.

A summary of applications are:

  • Monitoring sea ice zones and the Arctic environment, and surveillance of marine environment.
  • Monitoring land surface motion risks
  • Mapping of land surfaces: forest, water and soil
  • Mapping in support of humanitarian aid in crisis situations

Shortly after the August 2014 South Napa earthquake, data collected by Sentinel 1A was used to develop an interferometric synthetic aperture radar, or InSAR, image of the affected region. The Sentinel-1 satellites are expected to make analysis of earthquakes using InSAR techniques quicker and simpler.[6]


Prime contractor of mission is Thales Alenia Space Italy. SAR instrument will be the responsibility of Astrium Gmbh. The Ground Segment prime contractor is Astrium with subcontractors Telespazio, WERUM, Advanced Computer Systems and ARESYS.


  1. ^
  2. ^
  3. ^ a b
  4. ^ Thales Alenia Space. Sentinel 1A arrives at launch site in French Guiana
  5. ^ « Arianespace boosts Sentinel-1A Earth observation satellite into orbit », Arianespace Press Release, 3 avril 2014, Arianespace Twitter
  6. ^ "Sentinel System Captures Napa Quake". BBC News. Retrieved: 2 September 2014.

External links

  • Sentinel-1 at ESA – Sentinel Online
  • Sentinel-1 at ESA – Earth Online
  • Sentinel-1 at ESA – about us
  • Sentinel-1 Scientific Data Hub – ESA