Earth-to-geosynchronous satellite laser beam transmission

Area of Science:

• Satellite technology
• Optical detection systems
• Geospatial science

Background:

• Geosynchronous satellites require precise orbit prediction for mission success.
• Ground-based laser beacons offer a potential method for satellite tracking and navigation.
• Previous detection methods may have limitations in accuracy or real-time application.

Purpose of the Study:

• To report experimental results on detecting a ground-based laser beacon from a geosynchronous satellite.
• To demonstrate the feasibility of using optical observations for orbit prediction correction.
• To validate the detection of an Earth-based laser beacon by a satellite-borne radiometer.

Main Methods:

• Utilized a 50-cm diameter telescope for optical observation of the satellite.
• Employed a silicon intensifier tube camera for high-sensitivity imaging.
• Leveraged the visible channel of a radiometer aboard the Japanese Geostationary Meteorological Satellite for laser detection.

Main Results:

• Successfully detected the transmitted argon laser beam by the satellite's radiometer.
• Demonstrated the capability of optical observation to refine satellite orbit predictions.
• Confirmed the successful reception of the Earth-based laser beacon signal in orbit.

Conclusions:

• The experiment confirms the viability of using ground-based laser beacons for geosynchronous satellite monitoring.
• Optical observation and radiometer detection are effective methods for this purpose.
• This technique can contribute to improved satellite navigation and orbit maintenance.