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Goes-19 weather satellite enters Safe Hold mode

100 pointsby yabonestoday at 1:30 PM47 commentsview on HN

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dabluecaboosetoday at 2:33 PM

Former GOES engineer here. At this point I'd almost be surprised if 19 didn't have something go wrong. We had issues on almost every other satellite. GOES-17 had the loop heat pipe anomaly(Supposedly from someone stepping on it in the cleanroom...), GOES-15 (IIRC) had a micrometeorite strike, and GOES-13 had a fuel tank anomaly right before deorbit.

GOES-16 and GOES-17 are on-orbit spares, so in the extremely unlikely event of a total failure there's at least another spacecraft on-orbit ready to take up station.

That said, I have every faith in the GOES team to get to the bottom of this. They're the best, and I often wish I was back there working with them.

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ImJasonHtoday at 2:09 PM

https://www.nola.com/news/hurricane/weather-satellite-goes-1... explains a bit more what this is, and what this means.

> The main NOAA satellite for tracking Atlantic, Gulf Coast hurricanes is out until further notice

> GOES-19 is the main instrument used to identify tropical waves as they strengthen and move over the Atlantic, Caribbean and Gulf of Mexico, providing real-time tracking for forecasting.

dekhntoday at 2:55 PM

I love how "safe mode" for a satellite is basically: "extend solar panels, turn self towards sun, don't do anything unnecessary, wait for further instructions".

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Uncle_Brumpustoday at 2:44 PM

Interestingly, I noticed this in aproximately real time. I had been checking up on the visible-light geocolor composite images every hour or so to look at the massive plume of Canadian wildfire smoke that was turning the skies in the northeast dark orange yesterday.

I haven't interacted with the GOES site or cared too much about the image output until the last 2 days, and the it immediately broke. Somewhat humorous to me.

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ls65536today at 3:55 PM

Looks like they're making progress toward getting things restarted: "Update #2: The GOES-19 Safehold has been resolved and engineers are working to prepare for restart of the onboard instruments. More information on the recovery timeline will be provided when known." [0]

[0] https://www.ospo.noaa.gov/data/messages/2026/07/MSG_20260716...

tomnicholas1today at 3:57 PM

Anyone interested in accessing GOES data at scale will find this interesting - I created a Zarr index over the 7 billion chunks of data in the GOES-16 archive.

https://www.earthmover.io/blog/virtual-zarr

venzaspatoday at 2:13 PM

As an aside, I'm always surprised how US Gov websites look like they've been made in Dreamweaver in about 2006. Not even seemingly with a emphasis on usability either.

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jubilantitoday at 2:16 PM

A safehold is like maintenance mode, shutting down all non-essential systems, after it detects something is wrong. Doesn't necessarily mean it is gone for good, but not a good sign.

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ls65536today at 3:40 PM

Very unfortunate timing given the ongoing wildfires and associated smoke spreading across eastern North America in recent days.

ck2today at 5:22 PM

status page says

        SAFEHOLD HAS BEEN RESOLVED
> Update #2: The GOES-19 Safehold has been resolved and engineers are working to prepare for restart of the onboard instruments. More information on the recovery timeline will be provided when known.

* https://www.ospo.noaa.gov/operations/goes/status.html

* https://www.ospo.noaa.gov/operations/goes/status.html#datafi...

webdoodletoday at 4:16 PM

Invasion of Cuba incoming?

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nyankosenseitoday at 4:51 PM

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1g10ktoday at 2:55 PM

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