I reported previously (Feb 2017) that Ben Gurion University scientists were developing high resolution cameras for space-based imaging. They have now advanced to Synthetic Marginal Aperture with Revolving Telescopes (SMART) combining partial images from multiple nanosatellites.

http://in.bgu.ac.il/en/pages/news/new_imaging.aspx

https://www.osapublishing.org/optica/abstract.cfm?URI=optica-5-12-1607