TY  - BOOK
AU  - Hurn,Jeff
TI  - Differential GPS explained : : an exposé of the surprisingly simple principles behind toda´s most advanced positioning technology / 
PY  - 1993///
CY  - Sunnyvale : 
PB  - Trimble, 
KW  - GPS
KW  - GIS
KW  - SENSORES REMOTOS
N2  - Foreword - Basic GPS review - What is differential GPS? - Why do we need DGPS? - How does DGPS work? - Who´s using DGPS - What´s next? - Glossary of GPS terms
ER  -