Sentinel 1

From Wikipedia, the free encyclopedia
Jump to: navigation, search
This article is about ESA's earth monitoring satellite for the Sentinel series. For the NEO space telescope for finding asteroids for the B612 foundation, see Sentinel (space telescope).
Sentinel 1-IMG 5874-gradient.jpg
Model of a Sentinel 1 (radar antenna missing)
Manufacturer Thales Alenia Space
Country of origin Europe
Operator Thales Alenia Space
European Space Agency
Applications Earth observation
Bus Prima
Design life 7-12 years[2]
Launch mass 2,300 kg (5,100 lb) dry
2,170 kg (4,780 lb) dry
Dimensions 3.4 m × 1.3 m (11.2 ft × 4.3 ft)
Power 5,900 watts
Equipment C-Band SAR
Orbit regimes Sun-synchronous[1]
Built 1
On order 2
Launched 1
Operational 0
Retired 0
Failed 0
Lost 0
First launch Sentinel-1A
3 April 2014[3]
Last launch Sentinel-1B

Sentinel-1 is a space mission from ESA of the Copernicus Programme, consisting of a constellation of two satellites. The payload of Sentinel-1 is a Synthetic Aperture Radar in C-band which 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] The satellite was launched on 3 April 2014, by a Soyuz Rocket.[5]

Mission characteristics[edit]

  • Role: Earth Observation
  • Launch date: 3. April 2014
  • Launch mass: ~2300 kg
  • Launcher: Soyuz vol VS07
  • Launch location: Kourou, French Guiana
  • Orbit: Sun-synchronous dawn-dusk
  • Altitude: 693 km
  • Orbit cycle: ~96 minutes
  • Nominal duration: 7.25 years


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.


It 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


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. ^ "Copernicus: Sentinel-1 — The SAR Imaging Constellation for Land and Ocean Services". ESA eoPortal. Retrieved 2014-03-05. 
  2. ^ "Sentinel-1 facts & figures". ESA. 2013. Retrieved 2014-03-05. 
  3. ^ a b "Earth Online - Sentinel 1". ESA. Retrieved 2014-04-03. 
  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

External links[edit]