Title: Direct measurement of laser aberration and ahead point from ARTEMIS satellite through strong clouds,
Abstract: Laser communication has advances in compared with radio frequency
communication as result of much high carrier frequency from ultraviolet to near
infrared. Very narrow laser beam is possible to form with very high power
density. But laser beam has high destruction and attenuation on clouds,
turbulence, scattering on aerosols and molecules of the atmosphere. Low Earth
orbits (LEO), Middling Earth orbits (MEO) and partly Geosynchronous Earth orbit
(GSO) satellites moving on the sky and laser light from satellites moves across
different turbulence conditions of the atmosphere, clouds, molecules of the
atmosphere H2O, O2, N2, CO, O3 and other. We performed unique experiments with
propagation of laser beams from beacon of OPALE terminal of ARTEMIS satellite
through thin clouds. We have found that small part of laser radiation is
received from ahead point there the satellite will be after time of propagation
of laser radiation from the satellite to telescope. It is in accordance with
theory of relativity for aberration of light during transition from moving to
not moving coordinate systems. It is positive effect for laser communication
through the atmosphere and clouds because will be possible to develop a system
for reduce of the atmosphere turbulence during of laser communication from
ground to the satellites. The interest is what will be during propagation of
laser radiation from the satellite through strong clouds. The detail
descriptions of laser experiment with ARTEMIS GSO satellite through strong
clouds and estimations of the laser power through strong clouds are presented
in this paper. Accordingly we must search the optimal wave lengths and power of
lasers for performs laser communication in different cloudy conditions.