Google's Suncatcher prototype satellite online, running AI model in orbit
TechCrunch reports Google's Suncatcher space data center prototype is communicating with ground after commissioning and ran a preloaded Gemma 4 model.
The story in focus
Google's Suncatcher prototype space data center is online and communicating with the ground after a roughly three-week commissioning period, TechCrunch reported. Engineers sent the first prompt this week to a preloaded model, which wrote a haiku and reported on orbital conditions; a Google spokesperson said the satellite is operating nominally.
- The prototype launched earlier this month on a SpaceX Falcon 9 alongside more than 100 other spacecraft, according to TechCrunch.
- It carries four Google Tensor Processing Units but can run only one at a time for about 20 minutes given its 1 kW power budget.
- The first prompt this week asked Google DeepMind's Gemma 4 to write a haiku and report on orbital conditions.
- The test campaign will assess TPU performance under thermal stress and space radiation, including bit-flip risk.
- Two more satellites are planned for 2027 with higher power generation and inter-satellite optical links.
Prototype online after commissioning
Google's Suncatcher prototype space data center is online and communicating with the ground after launching earlier this month on a SpaceX Falcon 9 alongside more than 100 other spacecraft, TechCrunch reported. A commissioning process tested the satellite's subsystems over about three weeks before the spacecraft was ready to work.
A Google spokesperson told TechCrunch the satellite was operating nominally.
First prompts and radiation testing
Engineers on the ground sent their first prompt this week to the model preloaded onto the satellite, Google DeepMind's Gemma 4, asking it to write a haiku about being in space. Google also asked the spacecraft to report on orbital conditions around it.
The ongoing test campaign will examine how the chips perform under thermal stress and in the space radiation environment. Radiation can cause bit flips, corrupting stored data without triggering typical monitoring tools. Ground testing suggested radiation's impact would be minimal for inference workloads and more of a problem for training, but the team will now assess those dynamics in reality.
Power limits and next satellites
The satellite carries four TPUs and generates up to 1 kW of electricity. Because of the chips' power demands, it can turn on only one at a time for about 20 minutes, complicating space-to-ground communications.
If the onboard TPUs prove capable, Google plans to launch two more satellites with advanced chips in 2027, supporting higher power generation and demonstrating inter-satellite optical links.
How many TPUs does the Suncatcher prototype carry, and how many can run at once?
The satellite carries four Google Tensor Processing Units, but its 1 kW power budget allows only one to operate at a time for about 20 minutes, according to TechCrunch.
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