XR 1 [R2 Space]
R2 Space is developing the eight satellite XR Synthetic Aperture Radar (SAR) satellite constellation to provide data to the United States Government.
R2 Space was founded in 2018 in order to provide cutting-edge commercial satellite technology to address the intelligence, surveillance, and reconnaissance needs of the United States Government. R2 Space plans to launch and operate eight XR satellites over a series of launches.
The XR satellites are US-built copies of the Finnish ICEYE satellites. Each XR satellite has a stowed form profile measuring 0.66 x 0.51 x 0.40 meters, with a total mass of 90 kilograms (85 kilograms dry mass). All of the XR satellites are expected to be identical. R2 Space has identified Falcon 9 and Electron as two potential launch vehicles for the subsequent XR satellite launches.
The satellite payload is a SAR sensor and data collection system consisting of an active phased array with both transmit and receive modules, transmit and receive radios, and a data converter (A/D and D/A). During commissioning, the transmit and receive phased array is deployed from its stowed configuration to its full profile of 3.25 × 0.40 meters. The power system for each XR satellite consists of a set of solar panels producing a 300W peak, and a Li-Poly battery pack. The battery pack has a 1.4 KWh capacity and a 30V nominal voltage.
The Attitude Determination and Control System (ADCS) for each XR satellite consists of a GPS, Inertial Management Units, magnetometers, star trackers, torque rods, and reaction wheels, and is capable of achieving a pointing accuracy of less than +/- 0.1 degrees, and a GPS accuracy of less than 5 meters. During normal operations, the phased arrays will be Earth facing with look angles between 10 and 30 degrees relative to nadir. Phased arrays will be side looking with a 90-degree offset from the velocity vector.
Each XR satellite is equipped with a low thrust propulsion system that uses a solid metal propellant and produces a max delta V of 400 meters per second. During normal propulsive operations, the solid metal is heated and becomes the ion source; ions are then accelerated by an electric field to generate thrust.
The XR-1 satellite will be the first deployment of the XR constellation.is planned to be launched on an ESPA class adaptor on a Falcon-9 v1.2 (Block 5) ride-share mission. The XR-1 satellite is projected to be in a Sun-Synchronous Orbit and have an operational altitude of 550 kilometers with a 97.7-degree inclination angle.
|Type / Application:||Earth observation, radar|
|Power:||Solar cells, batteries|
|XR 1||-||2021||CC SLC-40||Falcon-9 v1.2 (Block 5)||with Starlink v1.0 R1-1, ..., R1-10, QPS-SAR 2, Umbra-SAR 2001, Capella 3, 4, ICEYE X8, X9, X10, Landmapper-Demo 6, 7, GNOMES 2, GHGSat C2, Hawk 2A, 2B, 2C, SHERPA-FX 1, ION-SCV 2, SAMSON 1, 2, 3, Charlie, ASELSAT, PIXL 1, LINCS A, B, SOMP 2b, IDEASSat, YUSAT, UVSQ-SAT, CPOD A, B, Astrocast 1.x1, ..., 1.x5, SpaceBEE x1, ..., x24, PTD 1, Lemur-2 130, ..., 137, Prometheus-2 10, ARCE 1A, 1B, 1C, (multiple satellites)|