Aqua MODIS Acquisition Plan Through August 2026

Platform Aqua
Instrument MODIS
Issue news
Last Updated 2021-10-26 13:00:00
Start 2021-03-18 00:00:00
End 2022-03-31 00:00:00

On March 18, 2021, Aqua completed all mission maneuvers related to maintaining a 1:30 mean local time (MLT) equator crossing and 705 km orbit altitude. In July 2021, Aqua began drifting to a later MLT. In January 2022, Aqua will begin its constellation exit by stopping all maneuvers except collision avoidance maneuvers and will reach and exceed a 1:45 AM MLT crossing in February 2023. MLT will continue to drift after this, reaching 3:50 PM around August 2026. Aqua MODIS will remain operational and generate the full suite of products until the end of the mission in August 2026.

Earlier crossing times for a morning platform like Terra mean lower solar elevations leading to more prevalent shadows. This decrease in orbit altitude alters the spatial coverage of the sensor including possible gaps in spatial sampling, decreased spatial coverage, and better spatial resolution. Products are mostly expected to be science quality except for reduced grid size (from lower altitude) and without a strict 16-day repeat of observations (from drift and changing orbit).

Details on the impact of the Constellation Exit on the quality of the product are being compiled and will be posted here when available.

If you have any questions, please contact the LAADS User Services .

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