ISRO's SpaDeX Mission to Demonstrate In-Space Docking.

BENGALURU, INDIA - The Indian Space Research Organisation (ISRO) has announced the SpaDeX mission, a pivotal step towards showcasing India's capabilities in space technology. This mission, aimed at demonstrating in-space docking, is set to be launched with the PSLV-C60, highlighting India's ambition to join an elite group of nations with this advanced space technology.

Mission Overview:

SpaDeX involves two small spacecraft, SDX01 (Chaser) and SDX02 (Target), each weighing around 220 kg. The goal is to prove the feasibility of autonomous docking, a technology crucial for ambitious projects like the Indian Human Spaceflight Programme, lunar sample return missions, and the construction of the Bharatiya Antariksh Station (BAS).

Objectives:

Primary: To demonstrate rendezvous, docking, and undocking in low-Earth orbit.
Secondary:

°Power transfer between docked spacecraft.

°Composite spacecraft control.

°Payload operations post-undocking.

Mission Execution:

Both spacecraft will be launched into a 470 km circular orbit with a 55° inclination. After achieving a relative separation, they will perform precise maneuvers to close the distance from 20 km down to a few meters, culminating in a low-impact docking.

New Technologies Introduced:

Docking Mechanism: A novel, low-impact, androgynous docking system.
Sensor Suite: Including Laser Range Finders, Rendezvous Sensors, Proximity and Docking Sensors for precise navigation.
Autonomous Systems: With indigenous algorithms for rendezvous and docking, and an Inter-Satellite Communication Link (ISL) for real-time spacecraft state awareness.
GNSS-based Relative Orbit Determination and Propagation (RODP): For accurate positioning and velocity determination.

Post-Docking Activities:

After the docking demonstration, both spacecraft will separate to execute their individual missions:

SDX01 will deploy a High-Resolution Camera for earth observation.
SDX02 will utilize a Miniature Multi-Spectral Payload for natural resource monitoring and a Radiation Monitor for space environment studies.

Development and Launch:

The spacecraft were developed by UR Rao Satellite Centre (URSC) with support from various ISRO units. They are now at the Satish Dhawan Space Centre (SDSC) gearing up for launch, showcasing India's growing prowess in space technology and its commitment to future space exploration endeavors.

This mission not only marks a significant achievement in India's space program but also sets the stage for more complex operations in space, reinforcing ISRO's role on the global stage.

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