EROS-B Satellite.png
EROS-B satellite in deployed configuration
NamesEarth Resources Observation Systems-B
Mission typeEarth observation
OperatorImageSat International
COSPAR ID2006-014A
SATCAT no.29079
Mission duration10 years (planned)
15 years, 5 months and 23 days (in progress)
Spacecraft properties
Spacecraft typeEROS-A
ManufacturerIsrael Aerospace Industries
Launch mass350 kg (770 lb)
Dimensions2.3 m in height
1.2 m in diameter
Span: 4 m on orbit
Power800 watts
Start of mission
Launch date25 April 2006, 16:47:16 UTC[1]
Launch siteSvobodny Cosmodrome,
Launch Complex-5
ContractorMoscow Institute of Thermal Technology
Orbital parameters
Reference systemGeocentric orbit[2]
RegimeSun-synchronous orbit
Perigee altitude506 km (314 mi)
Apogee altitude524 km (326 mi)
Period94.79 minutes

The Earth Remote Observation System-B (EROS-B) is the second satellite launched in a series of the EROS family of Israeli commercial Earth observation satellites, designed and manufactured by Israel Aircraft Industries (IAI).[3] It is owned and operated by ImageSat International N.V. (ISI), in the Netherlands Antilles, Cayman Islands, with offices in Limassol, Cyprus, and in Tel Aviv, Israel.. Originally the satellite was to be the first of a constellation of 4 EROS-B satellites, but the 3 following satellites were cancelled, leaving the satellite to be the only EROS-B satellite.[2]

Satellite description

The satellite is 2.3 m in height and 1.2 m in diameter. It weighted 350 kg at launch. The design of the satellite is based on the military reconnaissance satellite Ofeq-3, which was previously built, also by Israel Aerospace Industries for Israeli government use. ImageSat International estimates the satellite will work 14 years.[2]

Control systems

The satellite is equipped with a 3-axis stabilized and a four reaction wheels actuator. The satellite is also equipped with a star tracker, horizon sensor, sun sensor, gyroscope and magnetometer for altitude determination.[4]

Ground communication systems

The satellite is equipped with an imagery link four times faster than the EROS-A at 280 Mbit/s, a 15 kbit/s maintenance downlink, and a 15 kbit/s command uplink.[5]


The EROS-B was launched on 25 April 2006, at 16:47:16 UTC[1] from Svobodny Cosmodrome, Launch Complex-5 in eastern Siberia.[6]


The satellite offers an optical resolution of 70 cm (28 in), and as of launch date plans were to use it to monitor the developing of the nuclear program of Iran for potential threats to Israeli security. The satellite is equipped with a charge-coupled device (CDD) push broom scanner array, which provides 10,000 pixels per line and a total of 96 lines for selectable Time-Delay Integration (TDI) observation support. The satellite can be operated in both asynchronous and synchronous imaging mode. It has a Ground sample distance (GSD) of 0.70 m panchromatic imagery. Unlike the EROS-A whose primary purpose is to support agricultural engineers, the EROS-B is more specifically designed for illegal construction supervision, general infrastructure monitoring, and emergency monitoring such as oil and gas exploration. EROS-B is the first commercial satellite to offer high spatial resolution images of night-time lights from space.[7]

On 27 June 2016, the safety was the topmost concern for the 2016 Olympic and Paralympic Games, Rio 2016, ensuring that the people from every nation will be kept safe was a daunting task. To assist with this matter the Israeli satellite, EROS-B captured high-resolution images of up to 50 cm in an area of 450 km, thus enabling the identification of objects, people, cars, and goods. The announcement was made by Brazilian Defense Minister Raul Jungmann.[8]

See also


  1. ^ a b "Launch Log". Jonathan's Space Report. 14 March 2021. Retrieved 8 May 2021.
  2. ^ a b c "EROS B". Gunter's Space Page. 7 July 2020. Retrieved 9 May 2021.
  3. ^ "Serbia Settlement IAI Bond Purchase Boost Fortunes of Israel's ImageSat". SpaceNews. 28 January 2011. Retrieved 8 May 2021.
  4. ^ "EROS-B". Apollo Mapping. 27 June 2013. Retrieved 9 May 2021.
  5. ^ Hellermann, Rani. "EROS B – Operational Experience, Second year of operation 2008" (PDF). ImageSat. Archived from the original (PDF) on 24 February 2013. Retrieved 9 May 2021.
  6. ^ "EROS B (Earth Remote Observation System B)". ESA Earth Observation Portal. Retrieved 9 May 2021.
  7. ^ Katz, Yali; Levin, Noam (May 2016). "Quantifying urban light pollution — A comparison between field measurements and EROS-B imagery". Remote Sensing of Environment. 177: 65–77. doi:10.1016/j.rse.2016.02.017.
  8. ^ "Israel's EROS-B Satellite Rustles Up High Resolution Images For Rio Olympics". Satnews. 27 June 2016. Retrieved 9 May 2021.