... Jr., Global Positioning System: Theory and Applications, vols.1 and2, American Institute of Aeronautics and Astronautics, 370 L’Enfant Promenade,SW, Washington, DC,19 96. 3. Kay, S. M., Fundamentals ... expressed in distance.The position dilution of precision is defined asPDOP1jj2x+ j2y+ j2z(2.59) Fundamentals of Global Positioning System Receivers: A Software Approach James Bao-Yen TsuiCopyright ... navigation algorithms,” Chapter 9 inParkinson, B. W., Spilker, J. J. Jr., Global Positioning System: Theory and Appli-cations, vols.1 and 2, American Institute of Aeronautics and Astronautics,...