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terra has consistently orbited earth

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from pole to pole for over 20 years

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collecting important data about earth's

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systems

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crossing the equator at 10 30 am mean

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local time

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allowed tara's five instruments to

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collect consistent simultaneous data

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important to earth's systems research

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in 2020 terra completed its final

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inclination maneuver using some of its

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limited fuel supply to maintain that

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crossing time

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since that final inclination maneuver

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terra has continuously drifted to an

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earlier equatorial crossing time

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by the fall of 2022

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tara's crossing time will be earlier

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than 10 15 a.m

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then

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tara will be lowered to a new orbit

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where it will be able to collect

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valuable data at an even earlier

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crossing time

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small changes will be noticeable in

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terra's data and imagery

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evidence in imagery of the earlier

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crossing time will be visible as longer

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shadows especially in mountain

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landscapes

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like these images of the grant range in

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meanwhile as terra moves closer to earth

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the sensor's views will become narrower

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leading to slightly narrower swath

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widths

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the effect will be most noticeable in

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aster imagery but each of terra's

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sensors will be affected

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however the impact on science is

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expected to be minimal

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in fact some impacts could prove

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beneficial to some areas of research

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like land morphology

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surface temperature

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and climate research

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terra's lengthy legacy of more than two

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decades of data

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will continue to contribute to