NOAA-15 October Malfunction

After discussing about the current issue with NOAA-15 on the main SatNOGS Matrix channel I decided it was best to dump all the information I have come up with so far.

Based on looking thru twitter it appears the that issue began around 00:00 UTC on October the 19th 2022

This is the first instance I could find when I search up NOAA-15 on twitter. So I am considering it the start time of the issue.

Before this the sat appeared to be working properly, From someone else’s twitter.

This time line can be backed up with observations from the network that display the issue. SatNOGS Network - Observation 6631098
SatNOGS Network - Observation 6630204

While these observations do not.


Information on how the sensors on board NOAA-15 can be found in NOAA’s Product Guide for the series of satellites.

Along with an image created by @dereksgc that they shared in the Martix room showing the data path for all the sensors.


Linking in Scott Tilley’s twitter post with a GAC pass he captured just about 3 hours after when I think the fault first occurred.

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Recorded both HRPT and APT data, here are all the channels aligned for reference


Managed to capture the moment of failure.

00:57 19-Oct-2022 - 01:08 19-Oct-2022


Looks like it may be starting to recover.

Looks like it’s back to normal again.

00:28 28-Oct-2022 - 00:41 28-Oct-2022


Latest looks a bit messed up still

I think its on the very edge of working properly.

Appears to have recovered sometime between 2022-10-27 17:30 UTC and 2022-10-27 19:30

Still messed up SatNOGS Network - Observation 6661423

Working properly SatNOGS Network - Observation 6666144