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    Re: Navigation on other planets
    From: Frank Reed
    Date: 2014 Feb 23, 13:56 -0800

    Paul Dolkas, you wrote:
    "Actually, every now & then they use the cameras to do a sextant shot of the sun/demos/phobos to update their position. The rover’s on-board inclinometer serves as the AH."

    Do you have a source on this? I've read about imaging of the moons (primarily for exact orbit determination) that has been described as "potentially" useful for future position-finding on Mars, but I am skeptical that this is being used for position-finding now (except maybe to amuse some team members). None of the four rovers that have been on Mars have had any significant uncertainty in their positions. When you have exquisitely detailed imagery from orbit of the rover's "roving" terrain showing rocks and features even smaller than a meter across, navigation on the surface is a simple matter.

    -FER
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