Mission typeRadar imaging
COSPAR ID2007-023A
SATCAT no.31598
Spacecraft properties
BusThales Alenia Space
Launch mass1,900 kilograms (4,200 lb)
Start of mission
Launch date8 June 2007, 02:34:00 (2007-06-08UTC02:34Z) UTC
RocketDelta II 7420-10C D324
Launch siteVandenberg SLC-2W
ContractorUnited Launch Alliance
Orbital parameters
Reference systemGeocentric
Semi-major axis7,000.53 kilometres (4,349.93 mi)[1]
Perigee altitude628 kilometres (390 mi)[1]
Apogee altitude630 kilometres (390 mi)[1]
Inclination97.88 degrees[1]
Period97.16 minutes[1]
Epoch25 January 2015, 04:25:20 UTC[1]

COSMO-1 or COSMO-Skymed 1 is an Italian radar imaging satellite. Launched in 2007, it was the first of four COSMO-Skymed satellites to be placed into orbit. The spacecraft is operated by the Agenzia Spaziale Italiana, the Italian space agency, in conjunction with Italy's Ministry of Defence. It uses synthetic aperture radar to produce images for civilian, commercial and military purposes.[2]

COSMO-1 was constructed by Thales Alenia Space, based on the Prima bus. It was the first Prima-based spacecraft to be launched.[3] Designed for a five-year mission,[4] the satellite remains operational As of 2013.

ASI awarded Boeing a contract to launch COSMO-1, with the launch being subcontracted to United Launch Alliance when it was formed to take over Delta launch operations. The launch took place at 02:34:00 UTC on 8 June 2007. A Delta II rocket in the 7420-10C configuration, flight number Delta 324, lifted off from Space Launch Complex 2W at Vandenberg Air Force Base, successfully injecting the satellite into low Earth orbit. Spacecraft separation occurred 58 minutes and 5 seconds after liftoff.[5]

The satellite operates in a sun-synchronous low Earth orbit. As of 25 January 2015 it was located in an orbit with a perigee of 628 kilometres (390 mi), an apogee of 630 kilometres (390 mi), inclined at 97.88 degrees to the equator. It has an orbital period of 97.16 minutes, with right ascension of the ascending node of 211.26 degrees and an argument of perigee of 84.67 degrees.[1]


  1. ^ a b c d e f g h "SKYMED 1 Satellite details 2007-023A NORAD 31598". N2YO. 25 January 2015. Retrieved 25 January 2015. CS1 maint: discouraged parameter (link)
  2. ^ "COSMO-SkyMed". Agenzia Spaziale Italiana. Retrieved 1 October 2013. CS1 maint: discouraged parameter (link)
  3. ^ Krebs, Gunter. "Alenia Aerospace → Thales Alenia: Prima". Gunter's Space Page. Retrieved 1 October 2013. CS1 maint: discouraged parameter (link)
  4. ^ Krebs, Gunter. "COSMO 1, 2, 3, 4". Gunter's Space Page. Retrieved 1 October 2013. CS1 maint: discouraged parameter (link)
  5. ^ Ray, Justin (8 June 2007). "Delta Mission Report - Mission Status Center". Spaceflight Now. Retrieved 1 October 2013. CS1 maint: discouraged parameter (link)