3D render of planet Earth viewed from space, with night lights in Europe and sun rising over Asia. Blue hue treatment. Elements from NASA (https://eoimages.gsfc.nasa.gov/images/imagerecords/57000/57752/land_shallow_topo_2048.jpg)

U.S. Space Force's Space Systems Command (SSC) wants companies' inputs on high technology readiness level (TRL) radio frequency (RF) cross links for the envisioned Space-Based Surveillance Mission, SG-XX, constellation. SG-XX is to be a follow-on to the National Reconnaissance Office-led SILENTBARKER, and is to detect threats to “high value” U.S. satellites in geosynchronous (GEO) orbit (Defense Daily, May 22). "Free flyer" SG-XX satellites are to have wide field of view electro-optical systems. "All RF cross link designs that meet the…