Umbra Looks to Add to SAR Constellation

Umbra Lab is eyeing Q4 for the launch of two additional synthetic aperture radar (SAR) microsatellites to bolster its existing earth exploration satellite service constellation. In an FCC Space Bureau application Tuesday seeking permission to launch and operate two SAR microsatellites, Umbra said the two would have virtually identical RF and orbital characteristics as its licensed six-satellite constellation. Five of those six have been launched, with the sixth to go up this month, it said.