Cluster Re-sizing 500m 5km Objective of Techsat 21 Geo location mission is to provide 10-50 m geo-location accuracy Reconfigure Geo-location accuracy is Radar Mode Geolocation mode inversely proportional to size Figure courte sy of AFOSR Techsat21 of cluster Research Review(29 Feb-1 Mar 2000) Re-size cluster to an elliptical trajectory of 2.5 km to achieve 1500 approximately 10 m ground E750 resolution Example application is to 750 quickly locate a lost pilot -1500- (Time critical mission) 3000 1500 3000 1500 1500 Cross axis 30003000 velocity vector(m) Optimal cluster Re-sizing Space Systems Laboratory Massachusetts Institute of TechnologySpace Systems Laboratory Massachusetts Institute of Technology Cluster Re Cluster Re-sizing (1) -3000 -1500 0 1500 -3000 3000 -1500 0 1500 3000 -1500 -750 0 750 1500 Cr Velocity vector (m) oss Axis (m) Zeni t h - Nadi r ( m ) Reconfigure 500m 5km Radar Mode Geolocation Mode * Figure courtesy of AFOSR Techsat21 Research Review (29 Feb - 1 Mar 2000) Optimal Cluster Re-sizing • Objective of Techsat 21 Geo￾location mission is to provide 10-50 m geo-location accuracy • Geo-location accuracy is inversely proportional to size of cluster • Re-size cluster to an elliptical trajectory of 2.5 km to achieve approximately 10 m ground resolution • Example application is to quickly locate a lost pilot (Time critical mission)