Positioning & Control of the Cityfix System

Position determination systems based on differential satellite systems can achieve a very high accuracy. The Eurofix system for example, can determine positions with an accuracy of 5 metres for 95 percent of the time. A problem that arises when using these differential satellite systems, is the bad reception quality of the satellite signals in...

EUROFIX Regional Area Augmentation System: Reducing spatial decorrelation with Extended DGPS

Eurofix is an integrated navigation system, which combines Differential GNSS and Loran-C. The Loran-C system is used to transmit messages which contain differential corrections for GNSS by additional modulation of the transmitted signals. It has been shown that reliable data transmission with Loran-C stations up to 1,000 km distance is feasible....

The reliability of carrier phase DGPS position solutions in a high-dynamical environment.: The truth reference, the whole truth reference and nothing but the truth reference?

In this report, some tests are described which have been used to determine the reliability of carrier-phase DGPS position solutions, especially in a dynamical environment, such as an aircraft. Research has been done to determine the reliability of the acceptance test, used to determine whether a carrier-phase DGPS position solution is the ’true’...

MIAS real-time positioning and integrity monitoring: Multi-mode Integrated Approach System

This report describes the design requirements and the functional design for the implementation of real time control and position calculation of the MIAS airborne part. Important issues for this implementation are the timing of the asynchronous measurements. The setup used for the MIAS flights tests in 1994 and the results of these flight tests...

Analysis of the Eurofix Data Link

After the introduction of the Eurofix concept for transmission of Differential GPS data via Loran-C signals by additional phase modulation, the consequences of this modulation for conventional (non-Eurofix) users is discussed. In what follows, various modulation schemes will be introduced and the properties of these schemes will be described.

Development and testing of the airborne part of the MLS Integrated Approach System (MIAS)

The airborne part of the MLS Integrated Approach System (MIAS) was designed and implemented.