Data Hacking

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64 Part I — Hardware Hacks FIGURE 4-3: A quad-helix antenna in the vertical position When you are holding the GPS on the move, try to hold it with the antenna as vertical as possible and as far away from the body as comfortably possible to reduce the degree to which your body shields the signal. The human body is very effective at shielding the microwave signal from GPS because your body is largely made up of water, and water is an effective absorber of microwave frequency electromagnetic radiation. Patch Antenna Orientation How you hold a patch antenna is completely different from how you hold a quad-helix antenna. To get the best out of these antennas, you want to hold them so that they are horizontal to the ground (see Figure 4-5). This is by far the best orientation for patch antennas — the closer they are to being vertical, the less efficient they are. This may be a big part of the reason why some people think that the quad-helix antenna is better than the patch antenna. People have a natural tendency to hold a GPS receiver in a vertical position.
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Hacking GPS
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Hacking GPS Published by Wiley Publ
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Credits Acquisitions Editor Katie M
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Acknowledgments Extra special thank
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Contents Acknowledgments . . . . .
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Contents Chapter 5: Protecting Your
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Hardware Hacks part in this part Ch
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4 Part I — Hardware Hacks Garmin
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6 Part I — Hardware Hacks Diagnos
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8 Part I — Hardware Hacks Magella
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10 Part I — Hardware Hacks Magell
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12 Part I — Hardware Hacks Summar
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14 Part I — Hardware Hacks No cab
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16 Part I — Hardware Hacks FIGURE
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18 Part I — Hardware Hacks Combin
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24 Part I — Hardware Hacks 8. Car
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26 Part I — Hardware Hacks 12. A
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30 Part I — Hardware Hacks 6. Add
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34 Part I — Hardware Hacks Cradle
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Page 108: 38 Part I — Hardware Hacks Now ta
Page 114: Power Hacks Without power, even the
Page 118: FIGURE 3-2: AA lithium batteries Ch
Page 122: Chapter 3 — Power Hacks FIGURE 3-
Page 126: Chapter 3 — Power Hacks But what
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Page 134: Chapter 3 — Power Hacks As you ca
Page 138: Chapter 3 — Power Hacks With two
Page 142: Chapter 3 — Power Hacks 3. Take a
Page 146: Chapter 3 — Power Hacks 7. Finall
Page 150: FIGURE 3-21: 12-volt output from a
Page 154: Antenna Hacks Making the most out o
Page 158: FIGURE 4-2: The Garmin eTrex receiv
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90 Part I — Hardware Hacks Your s
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92 Part I — Hardware Hacks 4. If
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96 Part I — Hardware Hacks Creati
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98 Part I — Hardware Hacks 4. Tak
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100 Part I — Hardware Hacks FIGUR
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112 Part I — Hardware Hacks The U
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114 Part I — Hardware Hacks Heat
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118 Part I — Hardware Hacks 6. Pl
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120 Part I — Hardware Hacks 9. Af
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122 Part I — Hardware Hacks Summa
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Hacking the Firmware One guaranteed
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FIGURE 6-2: Healthy battery level o
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FIGURE 6-4: Files contained in the
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FIGURE 6-7: UltraEdit in action FIG
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Chapter 6 — Hacking the Firmware
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FIGURE 6-19: Exiting the applicatio
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FIGURE 6-26: Use Find Next to searc
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Magellan Summary Chapter 6 — Hack
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148 Part II — Software Hacks FIGU
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150 Part II — Software Hacks Conn
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152 Part II — Software Hacks A US
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154 Part II — Software Hacks FIGU
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156 Part II — Software Hacks 4. T
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158 Part II — Software Hacks e. S
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160 Part II — Software Hacks 2. D
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162 Part II — Software Hacks You
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GPS Data This chapter is all about
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W FIGURE 8-2: Lines of longitude Ch
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FIGURE 8-4: Waypoint information on
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FIGURE 8-8: Time zone information F
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Chapter 8 — GPS Data Different ty
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Chapter 8 — GPS Data After you ha
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FIGURE 8-17: EasyGPS detecting the
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FIGURE 8-21: Waypoints transferred
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Chapter 8 — GPS Data After you ha
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Chapter 8 — GPS Data you create a
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Chapter 8 — GPS Data 2004-11-18T
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xx.xxxxxxYYYY-MM-DDTHH:MM:SSZ
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Chapter 8 — GPS Data As normal, c
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www.waypoints.de www.swopnet.com/w
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Chapter 8 — GPS Data The most pop
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Examining the Data When you connect
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A Closer Look at NMEA Sentences Cha
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Examining NMEA Sentences Chapter 9
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s.s Time in seconds since last upda
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Chapter 9 — Examining the Data WP
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Chapter 9 — Examining the Data BW
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GPS NMEA LOG Chapter 9 — Examinin
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GPS Diagnostic Chapter 9 — Examin
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FIGURE 9-7: Playing back NMEA sente
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FIGURE 9-11: Adding errors to the s
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Chapter 9 — Examining the Data On
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Chapter 9 — Examining the Data of
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Recording Simulated NMEA Using GpsG
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Chapter 9 — Examining the Data We
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More Data Tricks In this chapter, w
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FIGURE 10-2: G7toWin configuration
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Chapter 10 — More Data Tricks The
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FIGURE 10-10: Pasting the bitmap in
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FIGURE 10-12: Contents of the downl
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FIGURE 10-16: The G7toCE configurat
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1. Turn off the device. 2. Connect
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Chapter 10 — More Data Tricks One
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Chapter 10 — More Data Tricks GP
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If the GPS time is early, then a ne
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FIGURE 10-31: Good antenna location
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FIGURE 10-34: A reradiating antenna
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FIGURE 10-37: VisualGPSXP Chapter 1
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FIGURE 10-40: Mask angle displayed
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Chapter 10 — More Data Tricks Thi
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Playtime part in this part Chapter
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256 Part IV — Playtime FIGURE 11-
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258 Part IV — Playtime This new s
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260 Part IV — Playtime One variat
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262 Part IV — Playtime As you ge
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264 Part IV — Playtime Search Pat
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266 Part IV — Playtime Look for t
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272 Part IV — Playtime TomTom sof
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274 Part IV — Playtime In additio
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276 Part IV — Playtime To keep th
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278 Part IV — Playtime Test all t
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286 Part IV — Playtime Power Prot
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288 Part IV — Playtime Do take gr
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292 Part IV — Playtime Points of
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294 Part IV — Playtime Using an a
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298 Part IV — Playtime To summari
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300 Part IV — Playtime Foxhunt Th
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302 Part IV — Playtime Go Fetch!
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304 Appendix A — GPS Primer Sever
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306 Appendix A — GPS Primer The C
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308 Appendix A — GPS Primer A B F
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310 Appendix A — GPS Primer A FIG
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312 Appendix A — GPS Primer Error
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314 Appendix B — Websites/Interne
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316 Appendix B — Websites/Interne
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318 Glossary Coordinates A unique n
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Symbols and Numerics * (asterisk),
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C/A-code (Coarse/Acquisition), 290,
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MeMap package for, 134-139 personal
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GPS III, Garmin. See also Garmin pr
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software version, displaying, 11 sw
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personal reradiating antenna, 73-74
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soft reset actions required after,
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