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Prima
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Sentinel-1A Credit: Manufacturer Image

Status: Operational 2014. First Launch: 2014-04-03. Last Launch: 2014-04-03. Number: 1 .

Sentinel-1A's C-band SAR was 13.3 x 0.8m in size. The satellite was only a quarter the mass of its predecessor Envisat which carried a wider array of instruments; in the Sentinel program there will be a series of smaller, more specialized satellites. At 05:14 GMT on April 5, Sentinel made a maneuver to avoid a very close pass by NASA's defunct ACRIMSAT satellite, which failed on December 14 2013 after suffering battery issues.

Cosmo-SkyMed Italian military surveillance radar satellite. Constellation of four satellites launched 2007.06.08 - 2010.11.06. Earth Observing (Radar) satellite built by Alenia Spazio for ASI, Italy. Launched 2007 - 2010. Used the Prima Bus bus.

• Cosmo-SkyMed 1 - . Mass: 1,700 kg (3,700 lb). Nation: Italy. Agency: ASI. Manufacturer: Alenia. Class: Surveillance. Type: Civilian Radarsat. Spacecraft Bus: Prima. Spacecraft: Cosmo-SkyMed. USAF Sat Cat: 31598 . COSPAR: 2007-023A. Apogee: 626 km (388 mi). Perigee: 622 km (386 mi). Inclination: 97.90 deg. Period: 97.20 min. The first of four Constellation of Small Satellites for Mediterranean basin Observation, Synthetic Aperture Radar satellites for primarily Italian military surveillance, but with products made available to civilian users as well..

• Cosmo-SkyMed 2 - . Mass: 1,700 kg (3,700 lb). Nation: Italy. Agency: ASI. Manufacturer: Alenia. Class: Surveillance. Type: Civilian Radarsat. Spacecraft Bus: Prima. Spacecraft: Cosmo-SkyMed. USAF Sat Cat: 32376 . COSPAR: 2007-059A. Apogee: 624 km (387 mi). Perigee: 621 km (385 mi). Inclination: 97.90 deg. Period: 97.20 min. Second Italian military radar satellite in the Cosmo-Skymed system..

• COSMO 3 - . Mass: 1,900 kg (4,100 lb). Nation: Italy. Agency: Martin. Class: Surveillance. Type: Civilian Radarsat. Spacecraft Bus: Prima. Spacecraft: Cosmo-SkyMed. USAF Sat Cat: 33412 . COSPAR: 2008-054A. Apogee: 623 km (387 mi). Perigee: 622 km (386 mi). Inclination: 97.90 deg. Period: 97.20 min. Part of Italy's all-weather military surveillance constellation; carried X-band synthetic aperture radar..

• Cosmo-SkyMed 4 - . Mass: 1,900 kg (4,100 lb). Nation: Italy. Class: Surveillance. Type: Civilian Radarsat. Spacecraft Bus: Prima. Spacecraft: Cosmo-SkyMed. USAF Sat Cat: 37216 . COSPAR: 2010-060A. Apogee: 623 km (387 mi). Perigee: 622 km (386 mi). Inclination: 97.90 deg. Period: 97.20 min. X-band radar satellite..

• Sentinel-1A - . Mass: 2,157 kg (4,755 lb). Nation: Europe. Class: Surveillance. Type: Military Radarsat. Spacecraft: Prima. USAF Sat Cat: 39634 . COSPAR: 2014-016A. Apogee: 692 km (429 mi). Perigee: 690 km (420 mi). Inclination: 98.16 deg. Period: 98.58 min.

  First satellite in the European Commission's Sentinel/Copernicus Earth observing program. Sentinel-1A's C-band SAR was 13.3 x 0.8m in size. The satellite was only a quarter the mass of its predecessor Envisat which carried a wider array of instruments; in the Sentinel program there will be a series of smaller, more specialized satellites. At 05:14 GMT on April 5, Sentinel made a maneuver to avoid a very close pass by NASA's defunct ACRIMSAT satellite, which failed on December 14 2013 after suffering battery issues.

• Sentinel-3A - . Mass: 1,200 kg (2,600 lb). Nation: Russia. Class: Surveillance. Type: Surveillance satellite. Spacecraft: Prima. USAF Sat Cat: 41335 . COSPAR: 2016-011A. Apogee: 806 km (500 mi). Perigee: 802 km (498 mi). Inclination: 98.60 deg.

  Eurockot/Krunichev Rokot's Briz-KM upper stage entered a 153 x 785 km transfer orbit followed by an 802 x 806 km target orbit, deploying the Sentinel-3A satellite. It then lowered perigee to 411 x 744 km to reduce orbital lifetime. ESA's Sentinel-3A was part of the European Union's Copernicus remote sensing program, and carried an ocean color imaging payload and an ocean-topography radar altimeter payload.

• Sentinel-1B - . Mass: 2,157 kg (4,755 lb). Nation: Europe. Class: Surveillance. Type: Military Radarsat. Spacecraft: Prima. USAF Sat Cat: 41456 . COSPAR: 2016-025A. Apogee: 700 km (430 mi). Perigee: 695 km (431 mi). Inclination: 98.20 deg.

  Arianespace flight VS14. The Fregat stage first burn reached an initial orbit of 695 x 700 km and deployed the Sentinel-1B radar imaging satellite for ESA. It then made a burn to 442 x 690 km and deployed three 1U cubesats. The ASAP-S adapter was ejected into the same orbit. Next, the Fregat stage made two more burns to reach 711 x 714 km and released the Microscope satellite. Finally, at 0118 UTC, Fregat made a deorbit burn and reentered over the S Atlantic. 1800LT SSO.