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Thank you for sharing this sad news Jeff.<br>
<br>
I can only deeply thank everyone who made this unique 24-year long
stereo (3N/3B) coverage of glaciers possible (importantly, with the
right gain settings!). <br>
<br>
11 May 2024: the day we lost a unique ability to monitor the Earth's
elevation on a global scale and a regular basis (very high
resolution cannot really do that). Let's hope that other missions
will take up this crucial task in the (near) future.
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<div class="moz-cite-prefix">Le 14/05/2024 à 18:09, Jeffrey Kargel a
écrit :<br>
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Dear GLIMS colleagues,</div>
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I have sad news about a loved one (machine). ASTER's VNIR has
shut down since May 11 and is not expected to recover. It is
an electrical problem on the spacecraft, as the messages from
Leon Maldonado indicate. TIR is still operable.</div>
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Fortunately the world has launched many other Earth observing
missions. Given the historical and ongoing (until May 11) role
that ASTER VNIR played with GLIMS and glacier studies,
landslide studies, glacier lake and outburst flood research,
and earthquake impact investigations, it is a sad occasion,
but the data legacy (ASTER's memoirs) survives.</div>
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Anyway, it was initially a 5-year mission, which then went on
and on for nearly a quarter of a century; that was like the
fictional Starship Enterprise's 5-year mission, which was
extended over the decades; however, Terra/ASTER explored only
one strange and wondrous world, a world that just could not be
better for human habitation and diverse life and wildly
varying conditions amongst the hot deserts, tundra landscapes,
forests, cities, farmlands, grasslands, oceans, rivers,
deltas, mountains, polar caps, glaciers, sea ice, snow fields,
lakes, clouds, and volcanoes... alas, from here on, our planet
is only as wonderful as we can keep it, or as wonderful as it
can be despite us. </div>
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ASTER SWIR and VNIR and all of you working with those
instruments' data did so much to help humans understand the
dynamics of glaciers in the world, their roles as natural
reservoirs, in causing disasters, as signposts of climate
change, and simply their innate beauty and their insistent
exclamation of borderlessness to people who sometimes imagine
themselves to be different and demarcated as separate from
their neighbors.</div>
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With ASTER, we made a difference, and we brought scientific
and public understanding of glaciers like never before.</div>
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Cry some tears, and cry in joy for what ASTER was and the
legacy of its data. That data legacy is still golden. Use the
data in the same ways as always and in new ways, and learn
more than you thought possible, and inform the world about
what you learn.</div>
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<span style="background-color: rgb(255, 255, 255);">And
remember, TIR is still going</span>.</div>
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Thank you METI/Japan, NASA and other U.S. agencies (USGS,
others) for your gift of ASTER and Terra, and thank you to all
the nations and individuals, ESA and other agencies who have
contributed to ASTER data analysis, and those who have
personally helped me with ASTER usage. </div>
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--Jeff Kargel</div>
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<div id="divRplyFwdMsg" dir="ltr"><span
style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Maldonado,
Leon (US 329A) <a class="moz-txt-link-rfc2396E" href="mailto:leon.maldonado.jr@jpl.nasa.gov"><leon.maldonado.jr@jpl.nasa.gov></a><br>
<b>Sent:</b> Monday, May 13, 2024 11:09 PM<br>
<b>To:</b> Jeffrey Kargel <a class="moz-txt-link-rfc2396E" href="mailto:jeffreyskargel@hotmail.com"><jeffreyskargel@hotmail.com></a><br>
<b>Subject:</b> Re: [EXTERNAL] ASTER TIR Only Mode (moving
forward)</span>
<div> </div>
</div>
<div>Hi Jeff,</div>
<div><br>
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<div>At this point of the mission and the particular hardware in
question, I do not expect there to be any hope for VNIR. This
does affect the wide angle pointing used for some of the GLIMS
targets as well as any of the urgent requests that relied on a
quick observation in VNIR-Only mode. We’ll definitely be
updating status at the next team meeting in September.</div>
<div><br>
</div>
<div>Leon…</div>
<div><br>
</div>
<div>_______________________</div>
<div><br>
</div>
<blockquote>
<div>On May 13, 2024, at 16:01, Jeffrey Kargel
<a class="moz-txt-link-rfc2396E" href="mailto:jeffreyskargel@hotmail.com"><jeffreyskargel@hotmail.com></a> wrote:</div>
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Leon,</div>
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Thank you for the update. I am sad that VNIR now is disabled.
Is there any realistic hope that the problem will be resolved
and VNIR can renew operations?</div>
<div
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--Jeff</div>
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<span
style="font-family: Calibri, sans-serif; font-size: 11pt;"><b>From:</b> Maldonado,
Leon (US 329A) <a class="moz-txt-link-rfc2396E" href="mailto:leon.maldonado.jr@jpl.nasa.gov"><leon.maldonado.jr@jpl.nasa.gov></a><br>
<b>Sent:</b> Monday, May 13, 2024 10:01 PM<br>
<b>To:</b> Jeffrey Kargel <a class="moz-txt-link-rfc2396E" href="mailto:jeffreyskargel@hotmail.com"><jeffreyskargel@hotmail.com></a><br>
<b>Subject:</b> ASTER TIR Only Mode (moving forward)</span>
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<div
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Hi Jeff,</div>
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As of 11-May, Terra spacecraft has experienced a problem in
it’s ability to properly transmit power from the the solar
arrays to the spacecraft batteries resulting in difficulty
ensuring a full barttery charge along with inability to
maintain proper battery temperatures. As a result, ASTER (for
its part) will need to turn-off the VNIR instrument to reduce
the power load on the Terra spacecraft. Moving forward ASTER
will only collect TIR data in its respective day mode
therefore GLIMS planning and all other data requests will only
be collected in TIR-Only mode.</div>
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Let me know if you have any other questions,</div>
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Leon…</div>
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______________________________<br>
Leon Maldonado<br>
ASTER Project Science Coordinator<br>
_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_<br>
Jet Propulsion Laboratory<br>
Earth & Space Science Div.<br>
Email: <a class="moz-txt-link-abbreviated" href="mailto:leon.maldonado@jpl.nasa.gov">leon.maldonado@jpl.nasa.gov</a><br>
______________________________</div>
</blockquote>
<br>
<div>______________________________<br>
Leon Maldonado<br>
ASTER Project Science Coordinator<br>
_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_<br>
Jet Propulsion Laboratory<br>
Earth & Space Science Div.<br>
Email: <a class="moz-txt-link-abbreviated" href="mailto:leon.maldonado@jpl.nasa.gov">leon.maldonado@jpl.nasa.gov</a><br>
______________________________</div>
<br>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
GLIMS mailing list
<a class="moz-txt-link-abbreviated" href="mailto:GLIMS@nsidc.org">GLIMS@nsidc.org</a>
<a class="moz-txt-link-freetext" href="https://nsidc.org/mailman/listinfo/glims">https://nsidc.org/mailman/listinfo/glims</a>
</pre>
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