Achieving 20cm Positioning Accuracy in Real Time Using GPS - the Global Positioning System

Marconi Canada (part of the Marconi North America Group of Marconi Electronic Systems) is a recognized world leader in the design, manufac ture, sale and support of high technology elec tronic products for the aerospace and communications market, for both military and commercial applications. Its headquarters and principal design and manufacturing facility is located in St Laurent, Quebec (in the greater Montreal area). Its facilities include a branch plant in Kanata, Ontario (in the Ottawa area), as well as sales and service offices across Canada. A photo graph of the Company's headquarters is presented in fig. 1. Marconi Canada is a pioneer in the design and manufacture of GPS receivers. The first receiver development took place in the early 1980s with a military receiver development for the Canadian Department of National Defence. Then, in the mid 1980s, the first commercial GPS receiver was developed. The next major development took place in the early 1990s for a GPS receiver to be installed on the new Boeing 777 aircraft. This marked the beginning of a series of successes for Marconi Canada in the commercial avionics market, and the Company is now recognized as a world leader in this area. In the mid 1990s, a new group was created with the objective of porting our GPS technology on low cost hardware platforms. This initiative has been a success as well, with the development of a variety of products targeted towards the consumer