Mars Global Surveyor Reaches Mapping Orbit
Mars Global Surveyor
News story originally written on February 22, 1999
almost ready to start collecting data. Scientists are going to start
testing their instruments. The satellite is now about 229 miles above Mars
in its final mapping orbit.
Mars Global Surveyor will pass over the same part of Mars at the same time
each day. Scientists need the satellite to be in this special orbit.
That way, they won't have to worry about day and night changes. They
want to measure how the areas change on longer timescales.
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