Subject: Satellite Outage/Anomaly: GOES-15 Star Tracker Anomaly-(Status
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*Topic: *GOES-15 Star Tracker Anomaly - Status Update
*Date/Time Issued:* 2015 Jun 26 2115 UTC
*Product(s) or Data Impacted: *GOES-15 Products
*Date/Time of Initial Impact:*2015 April 2320:32 UTC
*Date/Time of Expected End: *TBD*
*
*Length of Outage: *TBD
*Details/Specifics of Change: *
As of 1900z Jun 26, Star Tracker 2 on GOES-15 remains offline.GOES-15
remains fully operational as GOES-WEST, utilizing a single star tracker
to maintain attitude control.Product accuracy continues to remain
within
specifications approximately 95% of the time.
This week’s anomaly status meeting with NOAA, NASA, Boeing, and
Ball was
held on June 22.Ball reviewed the available data and determined
that the
PROM, EEPROM, and the Memory Bus are not sources of the star tracker #2
(ST2) anomaly.Ball has shifted their investigation on the SRAM and that
part of the investigation is ongoing. On Monday June 22 and Wednesday
June 24, NOAA executed the Ball testing sequence upload to ST2 memory
and download-block command tests to verify if subsets of commands are
actually getting through to the command handling code in ST2.Those test
results were delivered to Ball and a teleconference was held with Ball
and Boeing to discuss NOAA's questions from those tests on Thursday
June
25.Ball indicated that ST2 seems to be able to accept upload to the
memory based on their preliminary data review; however, further work is
necessary to solidify that initial conclusion.The next anomaly status
meeting is scheduled for Monday June 29 and activities are still
ongoing
to further isolate the problem with ST2
**
In the absence of a significant change of status, the next status
update
will be published on Thursday, Jul 2nd (due to the holiday).
*Contact Information for Further Information:* ESPC Operations at
ESPCOperations@noaa.gov and 301-817-3880
**
*Web Site(s) for applicable information:* N/A*
*
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Topic: GOES-15 Star
Tracker Anomaly - Status Update
Date/Time
Issued: 2015 Jun 26 2115 UTC
Product(s) or Data
Impacted:
GOES-15 Products
Date/Time of Initial
Impact:2015 April 2320:32 UTC
Date/Time of Expected
End: TBD
Length
of Outage: TBD
Details/Specifics
of Change:
As of 1900z Jun 26, Star Tracker 2 on
GOES-15
remains
offline.GOES-15 remains
fully
operational as GOES-WEST, utilizing a single star tracker to
maintain attitude
control.Product
accuracy continues to
remain within specifications approximately 95% of the
time.
This week’s anomaly status meeting with
NOAA,
NASA, Boeing,
and Ball was held on June 22.Ball
reviewed
the available data and determined that the PROM, EEPROM,
and the
Memory Bus are not sources of the star tracker #2 (ST2)
anomaly.Ball has shifted their
investigation on the
SRAM and that part of the investigation is ongoing. On Monday
June 22 and
Wednesday June 24, NOAA executed the Ball testing sequence
upload to ST2 memory
and download-block command tests to verify if subsets of
commands are actually
getting through to the command handling code in ST2.Those test results were
delivered to Ball and
a teleconference was held with Ball and Boeing to discuss
NOAA's
questions from
those tests on Thursday June 25.Ball
indicated that ST2 seems to be able to accept upload to the
memory based on
their preliminary data review; however, further work is
necessary to solidify
that initial conclusion.The
next
anomaly status meeting is scheduled for Monday June 29 and
activities are still
ongoing to further isolate the problem with ST2
In the absence of a significant change of
status, the next
status update will be published on Thursday, Jul 2nd (due
to the
holiday).
Contact Information for Further Information:
ESPC Operations at ESPCOperations@noaa.gov
and 301-817-3880
Web Site(s) for applicable information:
N/A
This message was sent by ESPC.Notification@noaa.gov.
You have been sent this and other notifications because you have
opted in to receive it. If for any reason, you wish to
unsubscribe, please contact ESPC Help Desk at ESPCOperations@noaa.gov
or (301) 817-3880. Please note: it may take up to two business
days to process your unsubscribe request.