18-10-2010, 12:15 PM
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Inter satellite Optical Communication
INTRODUCTION
Communication links between space crafts is an important element of space infrastructure, particularly where such links allow a major reduction in the number of earth stations needed to service the system.
example of an inter orbit link for relaying data from LEO space craft to ground is shown in the figure below
The above figure represents a link between a Low earth orbiting (LEO) space craft and a Geostationary (GEO) space craft for the purpose of relaying data from the LEO space craft back to the ground.
The link from the GEO Satellite to ground is implemented using microwaves.
However, the interorbit link (IOL) can employ either microwave or optical technology. Optical technology offers a number of potential advantages over microwave.