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ISRO Successfully Launches GSLV-F15 Rocket, Marking 100th Mission Milestone

The Indian Space Research Organisation (ISRO) successfully launched the GSLV-F15 rocket carrying the navigation satellite NVS-02 from the Satish Dhawan Space Centre in Sriharikota, Andhra Pradesh, at 6:23 AM on Wednesday. This historic launch marks ISRO’s 100th mission, reinforcing India’s leadership in space technology and satellite navigation.

A Significant Milestone for ISRO

The GSLV-F15 mission is the first under the leadership of ISRO Chairman V. Narayanan, who recently assumed office. It also marks ISRO’s maiden launch of the year. As the 27.30-hour countdown concluded, the 50.9-meter-tall rocket lifted off from the second launch pad, leaving behind a trail of thick fumes as it ascended into space.

This mission is the 17th flight of the Geosynchronous Satellite Launch Vehicle (GSLV) and the 11th flight featuring an indigenous cryogenic stage. The GSLV-F15 payload fairing is a metallic version with a 3.4-meter diameter, enhancing its structural efficiency. The rocket’s primary objective is to place the NVS-02 satellite into a Geosynchronous Transfer Orbit, a critical step in advancing India's satellite navigation capabilities.

Strengthening India’s Navigation System

The NVS-02 satellite is the second in the NVS series and is configured with navigation payloads in L1, L5, and S bands, along with a ranging payload in the C-band, similar to its predecessor NVS-01. Designed and developed at the U R Satellite Centre (URSC) with contributions from other ISRO centers, the satellite will play a pivotal role in enhancing India’s independent regional navigation system, Navigation with Indian Constellation (NavIC).

NavIC is designed to provide highly accurate Position, Velocity, and Timing (PVT) services across India and a 1,500 km radius beyond its borders. It offers two types of services: Standard Positioning Service (SPS) for civilian users and Restricted Service (RS) for strategic applications. According to ISRO, NavIC’s SPS ensures a position accuracy of better than 20 meters and a timing accuracy of better than 40 nanoseconds across its primary service area.

Applications and Future Impact

The NVS-02 satellite will support a wide range of applications, including:

  • Terrestrial, aerial, and maritime navigation

  • Precision agriculture and fleet management

  • Location-based services for mobile devices

  • Orbit determination for satellites

  • Internet of Things (IoT) applications

  • Emergency and timing services

Following the successful deployment, the satellite will be positioned in geostationary orbit at 36,000 km. Nilesh Desai, Director of the Space Applications Centre, ISRO, stated that this addition would enhance India’s Regional Navigation Satellite System by increasing the number of operational satellites from four to five, significantly improving overall accuracy.

National Recognition

Union Minister Jitendra Singh congratulated ISRO on this historic achievement, stating on social media:
"100th Launch: Congratulations @isro for achieving the landmark milestone of 100th Launch from Sriharikota. It’s a privilege to be associated with the Department of Space at this historic moment. Team #ISRO, you have once again made India proud with the successful launch of GSLV-F15 / NVS-02 Mission."

This mission follows the successful GSLV-F12 launch in May 2023, which carried the first second-generation navigation satellite, NVS-01. The successful deployment of NVS-02 further strengthens India’s autonomous navigation capabilities and underscores ISRO’s commitment to advancing space technology on a global scale.

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