Space debris and satellite laser ranging combined using a megahertz system.

Area of Science:

• Geodesy and Remote Sensing
• Optical Measurement Techniques
• Space Surveillance and Tracking

Background:

• Satellite laser ranging (SLR) provides mm-level precision for scientific satellites using retro reflectors.
• Space debris laser ranging (SDLR) offers sub-meter precision for defunct objects by analyzing diffuse reflections.
• Current methods require separate setups for SLR and SDLR, limiting efficiency.

Purpose of the Study:

• To develop and demonstrate a unified laser ranging system combining SLR and SDLR capabilities.
• To leverage Megahertz lasers for enhanced measurement precision and efficiency in tracking both active satellites and space debris.
• To enable simultaneous tracking of scientific targets and space debris without system reconfiguration.

Main Methods:

• Implementation of Megahertz lasers within a single integrated laser ranging setup.
• Utilizing the system for routine SLR measurements to scientific satellites.
• Applying the same system for SDLR measurements on specific space debris objects.

Main Results:

• Achieved measurement precision down to a few micrometers for SLR to retro reflectors (e.g., on the Jason-2 satellite).
• Obtained detailed SDLR data revealing reflections from individual surfaces of space debris.
• Demonstrated the capability to track both satellite types within a regular schedule without system adaptations.

Conclusions:

• The integrated Megahertz laser ranging system effectively combines the strengths of SLR and SDLR.
• This unified approach enhances efficiency and precision in space object tracking and characterization.
• The system provides valuable data for understanding satellite orbits and space debris rotational dynamics.