MarCO (Mars Cube One) is a two spacecraft mission to accompany the InSight Mars lander to provide real-time data relay during the landing phase, as the MRO, MAVEN, and Mars Odyssey orbiters will not be in position to receive InSight data. The probes are nick-named WALL-E and EVE.
The MarCO space craft were built at the NASA Jet Propulsion Laboratory to the 6U-cubesats form factor. They feature two deployable solar arrays and a deployable X-band antenna and an UHF antenna. These provide an 8 kbps UHF link from InSight to MarCO and an 8 kbps X-band link: MarCO to the Deep Space Network (DSN).
A color wide-field engineering camera on each MarCO will be used to confirm high-gain antenna deployment. The wide-field camera has a 138-degree diagonal field of view. Each MarCO also carries a color narrow-field camera with a 6.8-degree diagonal field of view pointed in the direction of the UHF antenna (the opposite direction from the high-gain antenna). Both cameras can produce images 752 by 480 pixels in resolution.
Both MarCOs carry a self-contained propulsion system featuring a system-in-a-tank design with propellant storage and feed system, thrusters and a controller and sensor suite. It has four 4 axial and four RCS 25 mN thrusters using R236FA hydrofluorocarbon gas as propellant.
The MarCO satellites were deployed from the Atlas-5(401) launch vehicles upper stage and fly on their own to Mars, performing trajectory correction maneuvers.
Depending on remaining fuel, the MarCO crafts may continue on to visit a small body.
|Type / Application:||Communication, data relay, interplanetary|
|Operator:||NASA Jet Propulsion Laboratory|
|Contractors:||NASA Jet Propulsion Laboratory|
|Equipment:||UHF/X-band transponder, engineering camera|
|Propulsion:||4 × axial 25 mN thrusters, 4 × RCS 25 mN thrusters|
|Power:||Solar cells, batteries|
|Lifetime:||> 1 year|
|MarCO A (WALL-E)||2018-042B||05.05.2018||Va SLC-3E||Atlas-5(401)||with InSight, MarCO B|
|MarCO B (EVE)||2018-042C||05.05.2018||Va SLC-3E||Atlas-5(401)||with InSight, MarCO A|