NVS-03 operated with three pyro valves open to overcome past technical hurdles, says ISRO chief
ISRO successfully launched the NVS-03 navigation satellite, utilizing a modified design with three open pyro valves to ensure mission reliability. This technical adjustment follows the failure of the previous NVS-02 mission and aims to restore the NavIC constellation to full operational capacity.
Why it matters
The success of this mission is critical for India's strategic and civilian navigation capabilities, demonstrating the agency's ability to troubleshoot and overcome past engineering failures.
ISRO chief V Narayanan said on Saturday that the NVS-03 satellite was operated with “three pyro valves open” to ensure mission reliability and overcome technical hurdles encountered in the past.Addressing the media at a post-launch press conference, Narayanan revealed that this bold technical decision was validated after rigorous vibration and shock testing by a national-level committee chaired by former ISRO chief Kiran Kumar.Pyro valves are crucial in spacecraft propulsion, and it may be recalled that the NVS-02 (launched in 2025), the second spacecraft in the NVS series, was a failure.A high-level panel, after thorough analysis, concluded that "the drive signal did not reach the pyro valve of the oxidiser line of the engine meant for orbit raising."In February 2026, ISRO, quoting the panel, announced that the most likely cause was the disengagement of at least one contact (in each of the main and redundant paths) of the connector.Against this background,…
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