JAXA-uppdatering: H3 No. 8-satellit lossades för tidigt i fairing-separationshaveri

Ny JAXA-analys av H3 Rocket No. 8:s misslyckande den 22 december 2025 —inledningsvis skyllt på andrastedgens motortrubble— avslöjar ett nytt problem: den 5 ton tunga navigationssatelliten Michibiki No. 5 lossades för tidigt under nyttolast-fairingskast strax efter uppskjutning från Tanegashima Island.

Efter H3 No. 8-uppskjutningshaveriet, som ledde till förlust av Michibiki No. 5-satelliten och en komprometterad bana, har JAXA pekat ut orsaken till en anomali under nyttolast-fairingseparering nästan fyra minuter efter uppskjutning. Ombordvideo visade skräp runt satelliten, som omedelbart vinglade och lutade. Sensorer registrerade plötsliga accelerationer vid satellitens fäste till övre steget, vilket bekräftade oavsiktlig separation. Denna fairing-relaterade felmod är skild från tidigare H3-problem, såsom motormalfunktioner, och skiljer sig från den initiala diagnosen av andrastedets tändningsproblem. Raketen fortsatte annars flygningen, men satelliten nådde inte sin planerade höga bana över 20 000 miles för Japans Quasi-Zenith Satellite System (QZSS), som förbättrar GPS-precisionen. JAXA har inte specificerat åtgärder ännu, men händelsen belyser utmaningarna med nyttolastsutplacering i nya uppskjutare och fairing-separeringens kritiska natur.

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