NASA's CAPSTONE silence down to a software flaw
was launched atop a Rocket Lab Electron in June and on July 4 the company's Photon spacecraft deployed CAPSTONE for a several month-long journey to the Moon.
During commissioning, engineers noted some inconsistent ranging data and sent a command to access diagnostic data. Alas, the command wasn't formatted to the radio's liking and the spacecraft fell silent. At that point, the spacecraft's fault detection system should have immediately rebooted the radio but didn't,"Software defects in spacecraft code are nothing new.
It would take a year and a good deal of agonizing over how a seemingly simple bug in code lifted from the Ariane 4 could cause such a catastrophe before the Ariane 5 would fly again. As for bandwidth constraints, we've no doubt that the CAPSTONE incident sent a shiver through the spines of the SOHO team after a mistake in a sequence of commands sent to the spacecraft resulted in the billion-dollar mission almost being lost in 2020
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