ATTITUDE CONTROL AND ORBIT DETERMINATION OF A CREWED SPACECRAFT WITH LUNAR LANDER IN NEAR RECTILINEAR HALO ORBIT

NASA's Gateway program plans to place a crew-tended spacecraft in cislunar Near Rectilinear Halo Orbit (NRHO). The craft will support arrivals of the crewed Orion spacecraft and the undocking and return of a crewed lunar lander. Attitude control during Gateway assembly and with the addition of a lunar lander is investigated. Perturbations on the Gateway from the docking and undocking of Orion and the lander are considered. Orbit determination accuracy is explored, with Deep Space Network (DSN) tracking supplemented with optical crater measurements to analyze the possible benefit in solution accuracy and/or DSN scheduling relief.