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Abstract
The LASSO (Laser Synchronization from Stationary Orbit) experiment is designed to demonstrate the feasibility of achieving time synchronization between remote atomic clocks w ith an accuracy of 1 nanosecond or better. It represents a new approach in that laser techniques are employed for the first time specifically for the transfer of time, previous efforts having essentially been centred around RF methods and the physical transport of reference clocks.
The experiment uses ground-based laser stations and the SIRIO-2 geostationary satellite, to be launched by ESA end of 1981 or early 1982.
The first part of paper presents the LASSO mission and the principle of the overall experiments. The second part is dedicated to system performance and technical details in terms of onboard hardware and test equipment. The last part discusses the operational organization, including ground segment, means of communication, participation of laser stations and operational scenarios. The future prospects for the LASSO experiment and its applications ares umm-arized by way of conclusion.