USA-205

USA-205,^[1] also known as Space Tracking and Surveillance System-Advanced Technology Risk Reduction (STSS-ATRR), and previously as Block 2010 Spacecraft Risk Reduction is a satellite formerly operated by the United States Missile Defense Agency. It was launched to demonstrate new technology for missile detection early warning systems (MDEWS).^[1] The technology demonstrated on STSS-ATRR was used in the development of the Space Tracking and Surveillance System (STSS) part of the Space-Based Infrared System (SBIRS).^[2]

USA-205

Launch of a Delta II rocket carrying an experimental satellite (STSS-ATRR) for the Missile Defense Agency.
Names	STSS-ATRR Block 2010 Spacecraft Risk Reduction
Mission type	U.S. military technology demonstration
Operator	Missile Defense Agency / U.S. Air Force
COSPAR ID	2009-023A
SATCAT no.	34903
Start of mission
Launch date	5 May 2009, 20:24:25 UTC
Rocket	Delta II 7920-10C (Delta D341)
Launch site	Vandenberg, SLC-2W
Contractor	United Launch Alliance
Orbital parameters
Reference system	Geocentric orbit
Regime	Sun-synchronous orbit
Inclination	97.8°

It was launched on a Delta II 7920-10C launch vehicle from Space Launch Complex 2W (SLC-2W) at the Vandenberg Air Force Base (VAFB) in California, at 20:24:25 UTC on 5 May 2009 into a Sun-synchronous orbit (SSO). The launch was conducted by United Launch Alliance.^[3]

Operational and administrative control of the Space Tracking and Surveillance System-Advanced Technology Risk Reduction (STSS-ATRR) satellite was transferred to Air Force Space Command (AFSPC), effective 31 January 2011. In addition to successfully demonstrating required on orbit system performance parameters for a prototype sensor technology, STSS-ATRR conducted Space Situational Awareness and related operations on an as-capable basis.^[4]

References

• Spaceflight portal

1. Krebs, Gunter. "STSS-ATRR". Retrieved 18 April 2009.
2. "STSS Risk Reduction Flight Eyes Launch". Aviation Week & Space Technology. 28 April 2009.
3. "United Launch Alliance Mission Overview".
4. "Missile Defense Agency Space Tracking and Surveillance System Advanced Technology Risk Reduction Satellite transfers to Air Force Space Command". Missile Defense Agency. 26 February 2011. Archived from the original on 2 December 2011. Retrieved 26 December 2020. This article incorporates text from this source, which is in the public domain.