Google Tests TPUs in Orbit, Launching October 1

Google is preparing to launch a satellite on October 1, equipped with its TPUs to test their performance under space conditions. The trial, conducted as part of Project Suncatcher, includes cooling tests and is part of a trajectory towards a constellation, with two satellites planned for next year.

Limited Operation and Cooling Tested in Orbit

Travis Beals indicates that the chips can only operate for about 15 minutes before needing to be shut down to cool off. Google reports that its TPUs have withstood high g-forces and elevated radiation levels during tests, but notes that certain aspects can only be evaluated under space conditions. The company plans to test an integrated thermal management system in orbit that combines heat pipes and radiators. This first flight aims to determine what works, identify points of failure, and apply these lessons to future missions.

Scheduled Launch and TPU Measurement Objectives

The satellite launch is scheduled for October 1 aboard a SpaceX Falcon 9 rocket. The device will carry Google’s Tensor Processing Units and will utilize solar energy in low Earth orbit. According to Google, the mission aims to measure how these TPUs respond to the stresses of spaceflight, radiation, and extreme temperatures, in order to assess their performance in the space environment.

Towards a Constellation for AI Computing

Google plans to place two additional satellites in orbit next year as part of Project Suncatcher, an experimental initiative aimed at exploring the possibility of AI data centers in orbit. The company presents this launch as a step towards a constellation of satellites equipped with chips. Travis Beals emphasizes that making space a suitable environment for large-scale AI computing will require methodical engineering to demonstrate the hardware's robustness against the physical and unpredictable realities of orbit. The idea of using satellites for computing is also being considered by Elon Musk, Jeff Bezos, and Eric Schmidt as an alternative to terrestrial data centers.