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5

Here’s a “real case” simulation, in the sense that I read the ISS initial state from a TLE+SGP4, then I propagate that TLE forward in time until I find a point 1 km away from the initial state (that point is the astronaut and he is exactly along the ISS orbit). The ISS ballistic coefficient is obtained from a best fit of the ISS position during two reboosts;...


3

Some starting numbers here would be that the leading hypersonic projectile will be scooping up a cylinder of atmosphere equal to the frontal area and it's traveled path. The first approximation of the distance that will halve the projectile speed will be the point at which the mass of that block of atmosphere equals the mass of the projectile. Mass of ...


1

In the linked AIAA article, the bottom of page 4 (excerpted below) estimates numbers for a 250 m x 0.28 m tape. When 700 km high, electrodynamic drag and aerodynamic drag are both about 15 μN. Higher up, electrodynamic drag dominates. To generalize this, into equation (4) plug in values for tape width w, a bunch of numbers ∆V me mi that I don't know how ...


3

Because it's using Earth's magnetic field to create drag. It's one of several passive deorbiting systems. An electromagnetic tether uses a conductive tether to generate an electromagnetic force as the tether system moves relative to Earth’s magnetic field. NASA: State of the Art of Small Spacecraft Technology, 12. Passive Deorbit Systems In-Space ...


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