Blackjack LEO Constellation
Blackjack is a DARPA program which will replace the old National Security Space (NSS) satellite infrastructure in GEO with a LEO mesh grid. DARPA intends to use this program to provide the United States Department of Defense with a consistent military network for sensing, communication, and data transport.  The program aims to have all satellites in LEO by 2021. 
Since modern satellites cost almost $1 billion to design, build, operate and maintain, DARPA limited the budget per satellite to $6 million. DARPA aims to operate on that limited budget by outsourcing the project to the private sector. In 2018, DARPA awarded Telesat a $550,000 contract to study implementation of satellite buses in the Blackjack program. European satellite manufacturer Airbus Defense and Space received a $2.9 million contract. Blue Canyon Technologies of Boulder, Colorado, received a contract for $1.5 million.  Trident Systems Inc. was given a $1.5 million contract for satellite payloads.