tag:blogger.com,1999:blog-5557240086320000561.post7342509147245935243..comments2024-01-15T00:07:32.472-08:00Comments on Mars and Me: Opportunity Sol 381 (Spirit Sol 401)Scott Maxwellhttp://www.blogger.com/profile/11510688120932625522noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5557240086320000561.post-49100895934068901122010-02-19T14:19:20.124-08:002010-02-19T14:19:20.124-08:00@g For position, we match up the local images with...@g For position, we match up the local images with the orbital images. For heading, Spirit and Opportunity have something called an "IMU" -- an Inertial Measurement Unit -- that performs the job of a compass. The IMU tracks pitch and roll as well as yaw (heading).<br /><br />Incidentally, the sort of magnet-based compass you might use on Earth won't work on Mars because Mars has essentially no magnetic field; our "compass" uses gyros to track heading (and pitch and roll) instead.Scott Maxwellhttps://www.blogger.com/profile/11510688120932625522noreply@blogger.comtag:blogger.com,1999:blog-5557240086320000561.post-72709693767670294122010-02-19T12:15:43.007-08:002010-02-19T12:15:43.007-08:00How did the orbital imagery drive figure the rover...How did the orbital imagery drive figure the rover's pointing orientation with respect to the imagery? Did you match features in the orbital and rover images, or does the rover have an on-board compass that is close enough?gnoreply@blogger.com