Front Cover -- Title Page -- Copyright Page -- Table of Contents -- Dedication Page -- Acknowledgments -- Prefaces -- Introdction -- PART ONE GPS TECHNOLOGY -- A BRIEF HISTORY -- Atomic Clocks -- Early GPS Endeavors -- Building the GPS Constellation -- Civilian GPS Access -- SATELLITES AND SIGNALS -- GPS: SPS versus PPS -- DGPS and WAAS -- Real-time Data Correction -- Post-processed Data Correction -- Satellite Maintenance -- Anti-satellite Attacks (ASATs) -- Jamming -- Spoofing -- HANDHELD RECEIVERS -- The GPS Watch -- Carrying the GPS Unit -- A REVIEW OF MAP AND COMPASS TECHNIQUES -- Compass -- Topographic Maps -- Compass + Topo Map -- A Typical Topographic Map -- Peripheral Information -- GETTING FROM A TO B -- UTM COORDINATES -- FALSE EASTING AND FALSE NORTHING -- TRIANGULATING YOUR POSITION -- MANAGING A GPS UNIT IN THE FIELD -- Water -- Impact -- Cold and Heat -- Dirt and Grime -- BATTERIES -- Rechargeable Batteries -- Recharging Batteries -- Weight and Bulk -- Cost -- Internal versus Removable Batteries -- PART TWO PLANNING A TRIP -- A PRACTICAL APPROACH -- A QUICK LESSON FROM THE WOODS -- SIDE TRIPS -- CONTINGENCY -- INFORMATION -- GETTING TO THE TRAILHEAD -- PART THRE NAVIGATING AND GATHERING TRAIL DATA -- DAY ONE -- Getting Started, Late -- On the Wrong Trail -- A Route Change -- DAY TWO -- Off-the-trail Excitement -- Satellite Reception Fails -- Alive and Well -- PART FOUR ANALYZING TRAIL DATA AFTER THE TRIP -- CONTRIBUTIONS TO GPS ERROR -- User Error -- Environmental Error -- System Error -- ENJOYING YOUR GPS DATA -- GLOSSARY -- Backcover.