A method for determining operational constraints for a first
constellation of non-geostationary satellites (
CONS_I) transmitting towards a terrestrial
station (SV) with respect to a second
constellation of non-geostationary satellites (
CONS_V) linked with the
station, the constraints comprising a maximum transmission power of the satellites of the first
constellation, the method includes determining triplets of limit values (θ, φ, I / N) of two angles (θ, φ) and of an interference-to-
noise ratio (I / N), the angles (θ, φ) defining a position of a
satellite (NGSO_I) of the first constellation relative to the
station and to a
satellite (NGSO_V) of the second constellation and the interference-to-
noise ratio being the ratio between interferences (I) transmitted by the first constellation on a link between the station and the
satellite of the second constellation and the
noise (N) of the link, the determination of the triplets being performed so that a distribution of
signal-to-noise and interference ratios (R) aggregated over a time interval is greater than a reference distribution (REF); determining at least the maximum transmission power of at least one satellite of the first constellation from the triplets.