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Mars Reconnaissance Orbiter
In this artist's conception of the Mars Reconnaissance Orbiter, note the thin, long pole in the center. That's the SHARAD antenna, which will be able to view liquid or water in up to 1 kilometer of the Mars crust. Also center, covered by blankets, is the HRISE camera, which will provide the highest-resolution photos to date.
During testing of the craft, workers stabilize the crane holding one of the enormous billboard-size solar panels.
This drawing illustrates that the newest Mars orbiter will be double the size of the satellites currently in operation around the Red Planet. MRO is the Mars Reconnaissance Orbiter and MGS is the Mars Global Surveyor.