Editing Space-based radar (section)

== Military ==

In the United States, [[Discoverer II]] was a proposed military space-based radar program initiated in February 1998 as a joint Air Force, [[DARPA]], and [[National Reconnaissance Office|NRO]] program.  The concept was to provide high-range-resolution ground [[moving target indication]] (GMTI), as well as SAR imaging and high-resolution digital mapping.  This program was cancelled by Congress in 2007.  SBR is a less-ambitious version of Discoverer II.

'''Space-based radar''' ('''SBR''') is a proposed constellation of active [[radar]] [[satellite]]s for the [[United States Department of Defense]]. The SBR system would allow detection and tracking of [[aircraft]], ocean-going vessels (similar to the [[Soviet Union|Soviet]] [[US-A]] program), and potentially land vehicles from space. This information would then be relayed to regional and national command centers, as well as [[E-10 MC2A]] airborne command posts.

=== Active military radar satellites ===

* Indian [[RISAT]]
* Russian [[Kondor (satellite)|Kondor]]
* Japanese [[Information Gathering Satellite]]
* German [[SAR-Lupe]]
* Chinese [[Huanjing (satellite)|Huanjing]]
* Italian COSMO - Skymed [[COSMO-SkyMed]]