{"id":"aigc-v0-4fc34505-50a7-59d0-a6d0-c53c5f334f2c","title":"ISRO Reveals NVS-02 Satellite Failure Root Cause: Pyro Valve Signal Loss Over a Year Later","description":"Discover the detailed findings from ISRO's investigation into the NVS-02 satellite's failure to reach its intended orbit. Learn about the specific issue with the pyro valve signal and the corrective measures implemented for future missions.","timestamp":1772285640,"category":"technology","headline":"ISRO Reveals NVS-02 Satellite Failure Root Cause: Pyro Valve Signal Loss Over a Year Later","modifiedHeadline":"ISRO: Satellite Failure Blamed on Signal Loss","subCategories":["scid_a1828536"],"subcategoriesName":["NASA & ISRO"],"region":"IN","bundleMetaData":{"bundleId":"b162fe12-9cac-4117-a958-cc0604a457de","bundleTitle":"Science Simplified","cardData":null},"iabCategoryId":"472","fcSummary":"Discover the detailed findings from ISRO's investigation into the NVS-02 satellite's failure to reach its intended orbit. Learn about the specific ...","summary":"Discover the detailed findings from ISRO's investigation into the NVS-02 satellite's failure to reach its intended orbit. Learn about the specific ...","ctaUrl":"https://trends.glance.com/newz/science_and_technology/IN/en/feedpost-specials/aigc-v0-4fc34505-50a7-59d0-a6d0-c53c5f334f2c?byte=true","sourceUrl":"https://trends.glance.com/newz/science_and_technology/IN/en/feedpost-specials/aigc-v0-4fc34505-50a7-59d0-a6d0-c53c5f334f2c?byte=true","bannerImage":"https://g-mob.glance-cdn.com/public/content/assets/partner/images/aigc-v0-4fc34505-50a7-59d0-a6d0-c53c5f334f2c-image-177204013054542717.WEBP","content":"

\n A year after its navigation satellite mission encountered a setback, ISRO has disclosed the findings of its investigation. The NVS-02 spacecraft's failure has been traced to a critical loss of signal in its pyro valve system.\n

Unraveling the NVS-02 Anomaly

More than a year has passed since the Indian Space Research Organisation (ISRO) experienced a significant hurdle in its navigation satellite program. On

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January 29, 2025, the NVS-02 spacecraft, intended to bolster India's navigation capabilities, failed to achieve its designated orbit. ISRO recently made public the conclusions of a high-level committee tasked with scrutinizing this failure. The investigation pinpointed the root cause to a critical malfunction within the spacecraft's pyro system. Specifically, the drive signal intended to activate a pyro valve in the oxidiser line of the engine, crucial for orbit-raising maneuvers, failed to reach its destination. This interruption meant the engine could not be fired, preventing the satellite from transitioning from its initial transfer orbit to its intended final circular orbit. The committee's analysis suggested that the most probable reason for this signal loss was the disengagement of at least one contact within both the primary and redundant connector pathways of the system, despite the inherent redundancy designed to ensure mission success.

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The Mission's Trajectory and Setback

The NVS-02 mission commenced on January 29, 2025, with its launch aboard the Geosynchronous Satellite Launch Vehicle (GSLV-F15). Upon separation from the launch vehicle, the spacecraft was successfully injected into an elliptical transfer orbit, characterized by an apogee of 37,785 km and a perigee of 170 km, with an orbital inclination of 20.8 degrees. Following this, the satellite initiated a series of autonomous operations, including the deployment of its solar panels and the stabilization of its orientation to ensure consistent power generation. However, the subsequent crucial phase of orbit-raising operations, designed to elevate the spacecraft from its elliptical transfer trajectory to the planned circular orbit, could not be executed due to the identified anomaly. This failure to perform the orbital maneuvers meant the satellite could not reach its operational position, marking a significant setback for ISRO's navigation satellite program.

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Corrective Measures and Future Assurance

In the wake of the NVS-02 anomaly, ISRO promptly established an apex committee to conduct a thorough review. This committee diligently analyzed telemetry data from the mission and performed detailed simulation studies to understand the failure mechanism. The recent public statement by ISRO represents the first comprehensive account of the issues encountered. Crucially, the investigation panel has put forth a set of recommended corrective actions aimed at bolstering redundancy and enhancing the overall reliability of pyro system operations for forthcoming missions. ISRO has confirmed that these recommendations have already been integrated into their systems. Evidence of these improvements was seen in the subsequent CMS-03 mission, launched on November 2, 2025, aboard an LVM-3 M5 rocket. In this mission, the updated pyro systems functioned precisely as intended, successfully placing the satellite into its designated orbit. ISRO has affirmed its commitment to applying these enhanced protocols to all future missions, where applicable, to prevent any recurrence of similar failures and ensure the robust performance of its space endeavors.

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ISRO Reveals NVS-02 Satellite Failure Root Cause: Pyro Valve Signal Loss Over a Year Later

SUMMARY