Isar Aerospace is preparing to launch its Spectrum rocket from a base in Norway, which would make it the first orbital launch from continental Europe outside Russia

Preparations are under way for a rocket test flight in Norway that could make history and give Europe greater independence from the market leader in orbital launches, the United States.

Isar Aerospace says it is planning to launch on 24 March between 12.30pm and 3.30pm CET, weather permitting.

  • booly@sh.itjust.worksEnglish
    3·
    2 days ago

    Eutelsat has geosynchronous orbits, which allows them to provide service over a much larger area per satellite and doesn’t require very many satellites to serve a consistent geographical area as the earth rotates and the satellites orbit the earth.

    Problem is, though, geosynchronous orbit is 35,786 km altitude. Light travels at 3.0 x 10^8 m/s. So any signal takes 120ms to get to the satellite, and 120 ms to return. Any signal is going to have a 240ms latency at a minimum, and that’s just physics.

    Starlink satellites have an altitude closer to 600 km. Light only takes about 2ms to get to that altitude, and 2ms to return. So the satellites add only about 4ms, which makes for easier and more seamless communication.

    In order to compete with starlink for most typical Internet applications, it’ll require a bunch more satellites orbiting at much lower altitudes.