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India's NavIC system lost another satellite due to a failed atomic clock, leaving only three functional satellites and undermining its GPS alternative goal.
India’s NavIC satellite navigation system lost another operational satellite when the IRNSS-1F, launched in 2016, failed on March 13, 2026, due to a dead atomic clock, reducing functional PNT satellites to three—below the minimum of four needed for reliable coverage.
The failure marks the end of its 10-year design life.
Despite the setback, the satellite will continue providing one-way broadcast messaging.
The system, which aims to reduce reliance on foreign GPS, has faced repeated issues, with six of 11 launched satellites failing, largely due to faulty imported atomic clocks.
ISRO is working to restore full functionality with planned launches of three replacement satellites by end-2026, including those using indigenously developed rubidium clocks.
El sistema NavIC de la India perdió otro satélite debido a un reloj atómico fallido, dejando solo tres satélites funcionales y socavando su objetivo alternativo GPS.