Method for realizing a space survey system for monitoring near-earth space

A method for realizing a space survey system for LEO zones of the Earth orbit comprising:

• positioning and placing network stations of optical survey systems over the surface of the globe according to a grid designed to offer an effective daily cycle of the system close to 24 hours and a chosen revisit period for an observed LEO zone
• defining for said grid a positioning in latitude of the optical systems according to preferred latitudes based on the orbit types to be monitored to obtain the revisit period, and
• providing:
• high latitude sites, >50° North or South,
• middle-latitude sites, between 30° and 50° North or South,
• sites with latitudes less than 30° close to the tropics and subtropics, and
• a selection of sites providing a longitude spacing of around 20° or less by calculating the average longitudinal shift of the trace on the ground of the low orbits over two successive orbits.