J.1.2 Reference flux data for space debris and meteoroids

Cumulative meteoroid and space debris fluxes (i.e. fluxes of particles of given size or larger) can be obtained directly from the flux models. Figure J-2 to Table J-5 give results from the models specified in the normative part of the document for specific orbits.

Figure J-2 gives the number of impacts m^-2 yr^-1 to a randomly oriented plate for a range of minimum particle sizes. The MASTER-2005 model was used for the debris and meteoroid fluxes. The results are for an altitude h = 400 km, inclination i = 51,6°, and the epoch May 1^st, 2005. Table J-3 gives the same results for a polar reference orbit (h = 800 km, i = 98°, all other parameters are as for Table J-2).

Table J-4 gives the number of impacts at the geostationary altitude (h = 36 000 km).

Table J-5 gives the number of impacts m^-2 yr^-1 to a randomly oriented plate for a range of minimum particle sizes/masses. The meteoroid model from 10.2.4.1 was used. A position outside the Earth’s influence on the meteoroid flux was selected (i.e. no shielding and no gravitational focusing was considered), e.g. the Earth Lagrange points.

Table J-6 gives flux enhancement and shielding factors for sporadic meteoroid fluxes encountered by spacecraft in typical Earth orbits. The procedure described in C.1 was used.

For various distances from Earth, Figure J-4 gives the meteoroid velocity distributions and average velocities as modified by the gravitational attraction of Earth according to the procedure described in C.1.2.