[GLIMS] Fw: terra update

[Jeffrey Kargel]

Dear GLIMS colleagues,
Here is some news about our old workhorse, Terra ASTER. It is reaching toward end of life, but it will not go quickly (unless it does). The end of life plan has some changes that will make the data different than many of you are used to.
Cheers,
Jeff Kargel

________________________________
From: Abrams, Michael J (US 329A) <mjabrams at jpl.nasa.gov>
Sent: Thursday, February 18, 2021 4:49 PM
To: arg3 at u.washington.edu <arg3 at u.washington.edu>; Davies, Ashley G (US 3223) <ashley.g.davies at jpl.nasa.gov>; Eng, Bjorn T (US 398A) <bjorn.t.eng at jpl.nasa.gov>; braup at nsidc.org <braup at nsidc.org>; Geller, Gary N (US 398P) <gary.n.geller at jpl.nasa.gov>; Hulley, Glynn C (US 329G) <glynn.hulley at jpl.nasa.gov>; Tan, Howard L (US 329A) <howard.l.tan at jpl.nasa.gov>; jeffrey.g.masek at nasa.gov <jeffrey.g.masek at nasa.gov>; jmars at usgs.gov <jmars at usgs.gov>; kargel at hwr.arizona.edu <kargel at hwr.arizona.edu>; Maldonado, Leon (US 329A) <leon.maldonado.jr at jpl.nasa.gov>; lprashad at asu.edu <lprashad at asu.edu>; matt.watson at bristol.ac.uk <matt.watson at bristol.ac.uk>; MickieGrace at LookoutRanch.com <MickieGrace at LookoutRanch.com>; Abrams, Michael J (US 329A) <mjabrams at jpl.nasa.gov>; mp337 at cornell.edu <mp337 at cornell.edu>; mramsey at pitt.edu <mramsey at pitt.edu>; rwessels at usgs.gov <rwessels at usgs.gov>; Hook, Simon J (US 3200) <simon.j.hook at jpl.nasa.gov>; Realmuto, Vincent J (US 329A) <vincent.j.realmuto at jpl.nasa.gov>; Carsten.Laukamp at csiro.au <Carsten.Laukamp at csiro.au>; ian.p.crum at nasa.gov <ian.p.crum at nasa.gov>; drew.h.kittel at nasa.gov <drew.h.kittel at nasa.gov>; kurtis.thome at nasa.gov <kurtis.thome at nasa.gov>; Jason.T.Hendrickson at nasa.gov <Jason.T.Hendrickson at nasa.gov>; dimitrios.c.mantziaras at nasa.gov <dimitrios.c.mantziaras at nasa.gov>; kd.sd.us at gmail.com <kd.sd.us at gmail.com>; ctorbert at usgs.gov <ctorbert at usgs.gov>; tmaiersperger at usgs.gov <tmaiersperger at usgs.gov>; wright at higp.hawaii.edu <wright at higp.hawaii.edu>
Subject: [EXT]terra update


External Email

January 29, 2021

Upcoming Terra Constellation Exit

Terra has completed all mission maneuvers related to maintaining a 10:30 mean local time (MLT) equator crossing and 705 km orbit altitude. Terra will begin drifting to an earlier MLT around April 2021. In October 2022, Terra will have a 10:15 AM MLT crossing, and continue to drift to earlier MLT. At this time, we will also lower our orbit altitude to 694 km. After constellation exit, ASTER science observations will continue in concert with the changing MLT. The major effect will be that the ASTER surface sampling pattern will no longer be repeating every 16 days. However, sample locations will be reported with the data in the same format as current data. The ASTER single pixel footprint size will decrease about 1% with the lower orbit altitude. We do not expect these orbit changes to have significant impacts to ASTER data quality. The mission is officially planned to end in September 2023. For more information, click on the link to Terra website.<https://terra.nasa.gov/about/terra-orbital-drift>





Michael Abrams

ASTER Team Leader

NASA/Jet Propulsion Laboratory

4800 Oak Grove Dr.

Pasadena CA 91109

818-354-0937

626-375-5922 (mobile)

mjabrams at jpl.nasa.gov


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