- •Contents at a Glance
- •Contents
- •Hardware Hacks
- •GPS Secrets
- •Hidden Secrets
- •Garmin Secret Screens
- •Hard Resets
- •Soft Resets
- •Warm Resets
- •Full GPS Resets
- •Diagnostic Screens
- •Autolocating
- •Magellan Secret Screens
- •Magellan Meridian Series
- •After a Hard or Soft Reset
- •Summary
- •Cables Demystified
- •The Data Cable
- •Power Cords
- •Combo Cables
- •Combining Cable Types
- •Multi-GPS Cables
- •Multi-Data Cables
- •Multi-Data/Power Cables
- •Multi-Data/Power/GPS Cables
- •Making Your Own Data Cables
- •Materials You Will Need
- •Don’t Want to Buy a Connector?
- •Making Power Cords
- •Power Cord Assembly
- •Testing
- •Precautions
- •GPS/iPAQ Connections
- •Cradle Modification
- •Testing the Connection
- •Making Combo Cables
- •Making Multi Cables
- •Summary
- •Power Hacks
- •GPS Power Needs
- •Alkaline Batteries
- •Lithium Batteries
- •Rechargeable (NiMH) Batteries
- •Battery Do’s and Don’ts
- •Power Hacks
- •Carrying Your Own 12-Volt Power Supply
- •Battery Packs
- •A Different Kind of Battery Pack
- •Alternative Power Supplies
- •Summary
- •Antenna Hacks
- •The GPS Antenna
- •Quad-Helix Orientation
- •Patch Antenna Orientation
- •Best Performance Summary
- •External Antennas
- •Antenna Placement
- •Other Things to Avoid
- •Reradiating Antennas
- •Personal Reradiating Antenna
- •Communal Reradiating Antenna
- •Reradiating Antenna Considerations
- •Setting Up a Reradiating Antenna in a Car
- •Testing the System
- •Making the System Permanent
- •Carrying a GPS Signal via Cable
- •How Much Signal Do You Need?
- •Cable Losses
- •Connector Losses
- •Using a Signal Repeater
- •Building Your Own Mega GPS Antenna
- •Materials
- •Building the Antenna
- •Summary
- •Screen Damage
- •Screen Protectors
- •More Screen Armoring
- •Commercial Protection for GPS and PDAs
- •Mounting GPS
- •Car Mounting
- •Mounting a GPS for Biking, Hiking, and Skiing
- •Making a Personalized Case
- •Summary
- •Software Hacks
- •Hacking the Firmware
- •Firmware
- •Updating Warnings
- •Updating the Firmware
- •Hacking GPS Firmware
- •Bypassing the Garmin eTrex Vista Startup Screen
- •Bypassing the Garmin eTrex Legend Startup Screen
- •Bypassing the Garmin eTrex Venture Startup Screen
- •MeMap Personalization
- •Manual Firmware Editing
- •Magellan GPS Firmware Modifications
- •Recovering from a Failed Firmware Load
- •Garmin
- •Magellan
- •Summary
- •Connection Types
- •Which Connection Is Best?
- •Troubleshooting Problems
- •PC Connection Trouble
- •General PDA Connection Trouble
- •General Bluetooth Connection Trouble
- •Software-Specific Issues
- •Erratic Mouse Pointer after Connecting a GPS
- •Windows XP Problem: Microsoft Ball Point
- •Microsoft MapPoint Troubleshooting
- •USB-to-Serial Converters
- •Summary
- •GPS Data Collection
- •Position, Velocity, Time
- •Waypoints
- •Working with the Data
- •EasyGPS
- •G7toWin
- •Creative Uses of GPS Data
- •Sharing Waypoints
- •Adding GPS Information to Digital Photos
- •Lightning Detector and Plotter
- •Wardriving
- •GPS in Programming
- •Summary
- •Examining the Data
- •NMEA
- •NMEA Sentences
- •NMEA Sentence Structure
- •A Closer Look at NMEA Sentences
- •Examining NMEA Sentences
- •NMEA Checksum
- •SiRF
- •Using NMEA Sentences
- •GPS NMEA LOG
- •GPS Diagnostic
- •RECSIM III
- •Using NMEA
- •GpsGate
- •Recording Actual NMEA Sentences with GpsGate
- •Recording Simulated NMEA Using GpsGate
- •Data Playback
- •Why Bother with NMEA?
- •Ensuring That Your GPS Works
- •Avoiding Data Corruption
- •Summary
- •More Data Tricks
- •Screenshots
- •G7toWin
- •G7toCE
- •Turning Your PC into a High-Precision Atomic Clock
- •Setting Up the Software
- •Setting Up the Hardware
- •Hooking Up Hardware to Software
- •Bringing a GPS Signal Indoors
- •Other Uses for GPS Data
- •Azimuth and Elevation Graphs
- •Surveying
- •Navigation
- •Signal Quality/SNR Window
- •NMEA Command Monitor
- •Experiment for Yourself
- •Summary
- •Playtime
- •Hacking Geocaching
- •GPS Accuracy
- •The Birth of Geocaching
- •Geocaching Made Simple
- •What Is Geocaching?
- •Geocaching from Beginning to End
- •The Final 20 Yards
- •Geocaching Hacks
- •Go Paper-free
- •Plan Before You Leave
- •Sort Out Cabling
- •Power for the Trip
- •Better Antennas
- •Protecting the GPS
- •Summary
- •GPS Games
- •The Dawn of GPS Games
- •Points of Confluence
- •Benchmarking/Trigpointing
- •GPS Drawing
- •Hide-and-Seek
- •Foxhunt
- •Other Games
- •Summary
- •GPS Primer
- •The GPS Network
- •How GPS Works
- •GPS Signal Errors
- •Summary
- •Glossary
- •Index
Chapter 9 — Examining the Data 219
Recording Simulated NMEA Using GpsGate
As a GPS user and someone who uses a lot of mapping software, there have been times when I wished that I could create an NMEA file quickly and without the fuss of hooking up a GPS to the PC. Well, using GpsGate, this is possible:
1. Right-click on the GpsGate icon in the System Tray and choose Source Simulator.
2. Now right-click the icon again and choose Simulator. This brings up the screen shown in Figure 9-20.
FIGURE 9-20: GpsGate simulator window
3.The window that is displayed controls the parameters of the simulated NMEA output. It enables you to enter waypoints along which the simulator will travel, as well as the speed of the simulated travel and what NMEA sentences are output, along with their frequency of appearance of the sentences.
4.Choose the settings that are appropriate to you (I suggest outputting each NMEA sentence once a second, which will provide quite a genuine output).
5.Click the Start button.
6.Once again, right-click on the GpsGate System Tray icon and choose NMEA Log.
7.To record the input, click the Record button. This brings up a dialog box asking you to choose a location in which to save the NMEA output file.
8.To stop recording, click Stop.
9.Once you are done, you can examine the NMEA output file.