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74 Part I — Hardware Hacks fixed to the GPS close to the antenna on the device. Usually, it is fastened on with Velcro fasteners and can be removed when needed.These antennas are great for in-car use or other applications for which you only want the signal to be transmitted over a short range. Communal Reradiating Antenna The communal reradiating antenna reradiator can transmit the GPS signal over a larger range than the personal reradiating antenna. Usually, these reradiators are capable of transmitting over a range of three to four meters. Reradiating Antenna Considerations The following sections describe some considerations for you to bear in mind when you are choosing and using reradiating antennas. Power Reradiating antennas require power. This power supply usually needs a 12-volt DC source, and a lead-acid battery is normally ideal. In a car or on a boat, you can tap into the existing electrical system. This will give you an almost unlimited power supply (given fuel and no mechanical failure). If you are on the move, you can use a portable 12-volt lead-acid battery. If your antenna uses AA or 9-volt batteries, then make sure that you have an ample supply of these. You don’t have to use a lead-acid battery the whole time. You can use other batteries, such as AA or even D cells in series, which enables you to make a lighter and safer pack. If you use rechargeable batteries, it isn’t as wasteful and you don’t need to have a 12-volt charger. Another power option is to use a solar charger to top up a battery pack. One such system is the SmartSolar solar panel and battery pack shown in Figure 4-14. The 10 NiMH batteries provide a 12-volt power supply and can deliver 1 Ah of power. This is enough to keep a reradiating antenna working for several hours without recharge. Range If you want to use a reradiating antenna with more than one GPS unit, you will need the communal type that can serve more than one GPS. Technically, there is no limit to how many GPS receivers a single reradiating antenna can serve — as long as they all fall within the range of the re-transmitting antenna. Remember that reradiating antennas can mask the proper GPS signal for those around you who may need to use it. Tidiness Reradiating antennas are made up of a lot of cables, including the cable taking the power to the reradiator and the coaxial cable to the antenna. Keep these cables tidy to prevent damage and tangles.
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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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38 Part I — Hardware Hacks Now ta
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Power Hacks Without power, even the
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FIGURE 3-2: AA lithium batteries Ch
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Chapter 3 — Power Hacks FIGURE 3-
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Chapter 3 — Power Hacks But what
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Page 138: Chapter 3 — Power Hacks With two
Page 142: Chapter 3 — Power Hacks 3. Take a
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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
Page 162: Chapter 4 — Antenna Hacks FIGURE
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Page 170: FIGURE 4-9: MMCX connector on a Hai
Page 174: Chapter 4 — Antenna Hacks For tru
Page 178: This sequence is summarized in Figu
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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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