Bangladesh Satellite Survives Defunct Indian Satellite Fragment

Demonstrating high-precision orbital maneuvering, Bangladesh's maiden geostationary communications satellite, Bangladesh Satellite-1 (BS-1), successfully avoided a catastrophic high-velocity collision in deep space with defunct Indian space debris, following critical tracking telemetry from the US space agency NASA.

According to authoritative technical sources, orbital space remains crowded with spent rocket stages and defunct spacecraft orbiting Earth under the gravitational equilibrium of space. Last August, NASA's Space Tracker alerted the primary ground control facility of the Bangladesh Satellite Company Limited (BSCL) in Gazipur that an uncontrollable fragment from INSAT-1A was hurtling along a trajectory intersecting BS-1. INSAT-1A, launched by India on April 10, 1982, was decommissioned on September 6, 1982, following propulsion malfunctions and depletion of fuel. NASA flagged the encounter as urgent, projecting the debris to pass within an alarming 852 meters of BS-1 inside a 12-hour operational window. The scenario mirrored the catastrophic hypervelocity collision of February 10, 2009, when Russia's inactive Cosmos-2251 destroyed the operational US communications satellite Iridium-33, obliterating both into thousands of untraceable pieces.

BSCL Managing Director and Chief Executive Officer Dr. Muhammad Imadur Rahman informed that leave for over 50 engineers was immediately suspended, placing the Gazipur control center on 24-hour alert. During the four-day crisis, Dr. Rahman remained on-site with the orbital flight dynamics team for two days, while Postal and Telecommunications Minister Fakir Mahbub Anam and Prime Minister's Telecommunications Advisor Rehan Asad coordinated guidance virtually.

Detailing the tight orbital margins, Dr. Imad explained that room for maneuver was exceptionally restricted. The satellite could not be adjusted forward, backward, or to the right; shifting to the left carried the severe hazard of entering the orbital envelope of an adjacent active satellite. As tracking data indicated the fragment closing in, engineers executed a delicate lateral burn, displacing BS-1 slightly to the left, and held the position until the fragment traversed the hazard corridor just 852 meters away. Once the clearance window closed, BS-1 was successfully returned to its licensed geostationary orbital slot at 119.1 degrees East longitude without structural damage or disruption.

Addressing queries from DiGi-Bangla regarding future collision risks for the eight-year-old spacecraft, Dr. Imadur Rahman highlighted forthcoming training initiatives, stating: "Our engineering corps has already demonstrated exceptional capability. To further elevate their proficiency, advanced training programs will be rolled out for these skilled engineers. General engineering personnel will also undergo rigorous orbital dynamics instruction to master precise forward and backward navigational maneuvers."

BSCL noted that BS-1 had previously averted proximity hazards: once from Russian space debris in 2021, and again from an operational US satellite in 2025. Despite the emergency realignment, BSCL General Manager (Sales & Marketing) Shah Ahmedul Kabir confirmed that the precise propulsion maneuvers preserved propellant reserves, effectively extending the spacecraft's active operational life expectancy by 17 months.

Highlighting the technical complexity, BRAC University Professor of Computer Science and Engineering Dr. Md. Khalilur Rahman told that maneuvering an operational spacecraft in real time to avoid hypervelocity orbital fragments represents apex aerospace engineering, and the execution by domestic engineers merits international acclaim.

Constructed by France's Thales Alenia Space, BS-1 was launched on May 12, 2018, aboard a SpaceX Falcon 9 Block 5 vehicle from Kennedy Space Center, Florida. While initially monitored jointly through overseas tracking stations, BSCL assumed full autonomous control in 2021. With a manufacturing and launch capital investment of approximately BDT 2,765 crore and an operational design life of 15 to 18 years, the satellite carries 40 transponders (20 dedicated to domestic operations and 20 for regional commercial lease), anchoring national television broadcasting, remote broadband connectivity, and disaster communications.

//DBTech/IH/SMP/DPO//