Space State Representation Corrections as an Aid in Pseudolite Positioning

Area of Science:

• Geomatics Engineering
• Satellite Navigation Systems
• Signal Processing

Background:

• Current methods for transmitting pseudolite coordinates to GNSS receivers lack standardization.
• Existing solutions are often system-specific and not universally applicable.
• Low resolution of broadcast ephemeris data hinders universal pseudolite coordinate transmission.

Purpose of the Study:

• To propose and evaluate novel methods for transmitting pseudolite coordinates to GNSS receivers.
• To overcome the limitations of existing data transmission techniques for pseudolites.
• To enhance the integration of pseudolite systems within GNSS infrastructure.

Main Methods:

• Modification of the Radio Technical Commission for Maritime Services (RTCM) Special Service Message (SSR) frame.
• Development of a new RTCM frame specifically for pseudolite position data transmission.
• Numerical analysis and simulation of the proposed transmission methods.

Main Results:

• Demonstrated feasibility of integrating pseudolites by modifying existing RTCM SSR frames.
• Proposed a new RTCM frame offering a dedicated channel for pseudolite positioning.
• Numerical examples validated the effectiveness and potential of the presented solutions.

Conclusions:

• The proposed RTCM frame modifications offer viable solutions for pseudolite coordinate transmission.
• These methods enhance flexibility and accuracy in augmenting GNSS with pseudolite systems.
• The study provides a foundation for future standardization in pseudolite data dissemination.