 As well as large SAR aircraft such as the E-8 Joint Surveillance Target Attack Radar System (Joint STARS), whose AN/APY-3 radar has multiple modes including ground moving target indication, the US has highly classified radar satellites.Quill launched in 1964, was the first radar satellite, essentially a prototype.A system originally called Lacrosse (or Lacros), Indigo, and finally Onyx appears to be the only US radar satellite system, using pushbroom scans and "spotlighting" SAR.