OneWeb #18

Launch Time
Sun Mar 26, 2023 03:30 UTC


Image Credit: ISRO
Status: Active
Price: $62.0 million
Liftoff Thrust: 11,898 kN
Payload to LEO: 10,000 kg
Payload to GTO: 4,000 kg
Stages: 3
Strap-ons: 2
Rocket Height: 43.4 m
Fairing Diameter: 5.0 m

Mission Details

OneWeb #18

The 18th flight dedicated to the OneWeb high-speed Internet constellation. The initial constellation consists of 648 satellites. Later, the constellation could be expanded to more than 900 satellites depending on demand. OneWeb is expected to begin customer demonstrations in 2022, then provide a global, 24-hour service in 2022/2023.

Each satellite in the constellation weighs 147.7 kg. They are powered by Russian ion engines, manufactured by OKB-Fakel, and have two solar panels for their power supply. The first generation of satellites, operating on a quasi-polar orbit (1 200 km x 86.4°), cannot perform inter-satellite communication, and can only be used near a ground relay station.

The satellites will provide user service in the Ku-band, communicating in the microwave range of frequencies in the 12-18 GHz portion of the electromagnetic spectrum.

The satellites use a technique called "progressive pitch" in which the satellites are slightly turned to avoid interference with Ku-band satellites in geostationary orbit. The user terminal antenna on the ground will be a phased array antenna measuring approximately 36 by 16 cm and will provide Internet access at 50 megabits/second downlink bandwidth (almost certainly less uplink, but this number remains hard to pin down). The satellites will be designed to comply with orbital debris-mitigation guidelines for removing satellites from orbit and, for low-orbit satellites, assuring that they reenter the Earth's atmosphere within 25 years of retirement.

Payloads: 36
Total Mass: 5,317.0 kg
Polar Orbit


Second Launch Pad, Satish Dhawan Space Centre, India



48th orbital launch attempt

Indian Space Research Organisation

86th mission
2nd mission of 2023
71st successful mission
4th consecutive successful mission


6th mission
1st mission of 2023
6th successful mission