OneWeb announced April 20 that it signed an agreement with NSIL, the commercial arm of the Indian space agency ISRO, for launches of OneWeb satellites. Vanotti confirmed that NSIL will launch those satellites on the Geosynchronous Satellite Launch Vehicle (GSLV) Mark 3, the most powerful version of the GSLV but one that has not launched since 2019. He did not disclose how many launches that contract includes.
“Considering the geopolitical situation, I would say that we’ve had an incredible turnaround with great support from both SpaceX and the Indian space agency,” he said.
Commitment to space sustainability
Vanotti appeared on a panel with Julie Zoller, head of global regulatory affairs for Amazon’s Project Kuiper broadband constellation, where both emphasized their commitment to space sustainability.
“Space sustainability is critical for Project Kuiper. It’s been a priority from day one,” Zoller said, citing as examples the company’s plans to use narrow tolerances for the orbits of the satellites and to actively deorbit them at the end of their lives.
“We take our responsibility for the space commons extremely seriously,” Vanotti said, emphasizing the company’s commitment to reliability for its satellites to ensure they can deorbit at the end of their lives. The high orbit of the OneWeb satellites means they will not reenter within 25 years, as recommended by current orbital debris mitigation guidelines, with atmospheric drag alone.
OneWeb has also worked to ensure its satellites can be removed from orbit by other spacecraft should their onboard propulsion fail. However, Zoller said there were no similar plans for Project Kuiper satellites, in part because those satellites are in lower orbits of between 590 and 630 kilometers. “We’re not using a third party to do active debris removal. We are the active debris remover,” she said, claiming the satellites can deorbit within 10 years even without propulsion.
Both also said they were working on another element of space sustainability, reducing the brightness of their satellites to limit their interference to astronomy. For Amazon, that includes a test with two prototype satellites that the company plans to launch as soon as late this year on an ABL Space Systems RS1 rocket. Zoller said one of the two satellites will be equipped with a sunshade to block sunlight from reflecting off parts of the satellite, similar to the “VisorSat” concept SpaceX used for some of its Starlink satellites.
“We can compare and contrast the difference between a shielded and an unshielded satellite in our very first launch,” she said. “We’re excited to get data on that and to find out what we can do next.”
Vanotti said OneWeb keeps in contact with astronomical groups in the United States and United Kingdom, and in the last year started an “active observation campaign” to monitor the brightness of its satellites. Those observations help refine a model of the satellites. “We’re going to be using this tool in order to optimize the design of the future generation of our satellites,” he said, “to have a lower impact on dark skies.”