Abstract: Provided herein are platforms and methods for exchanging escrowed data between multiple users while preserving privacy and systems, methods, and applications for event-centric matching that enables secure communications between users, and event location sharing. Further, the systems, methods, and applications herein enable users to easily find relevant and local events.

Abstract: Provided herein are platforms and methods for exchanging escrowed data between multiple users while preserving privacy and systems, methods, and applications for event-centric matching that enables secure communications between users, and event location sharing. Further, the systems, methods, and applications herein enable users to easily find relevant and local events.

Abstract: A compact SFS may can be deployed in small space vehicles. The SFS may have a small size, weight, and low power requirements. The hardware, software, catalogs, and calibration algorithm of the SFS provide highly accurate attitude information that can be used for pointing. For instance, accurate attitude determination may be provided that supports pointing of a deployable high gain helical antenna. A full “lost in space” attitude solution, accurate to about an arcminute, may be accomplished in under a minute. The SFS may be fully reprogrammable on orbit, allowing continued algorithm development and deployment after launch.