• Optic green baseplate offers easy map navigation
  • Tool-free declination adjustment
  • Lightweight with two-degree graduations
  • Inch and millimeter scales
  • This item is not for sale in Catalina Island
The classic Brunton Green Baseplate Compass with Magnifier and Luminous Points offers easy map navigation thanks to an optic green baseplate and tool-free declination adjustment. A magnifier and luminous points further enhance your ability to accurat

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Bushnell BackTrack GPS Digital Compass Navigation G2 Black/Green - 360401

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Garmin Nuvi 57LM 5" GPS Navigation System
$45.00
End Date: Friday Jan-19-2018 16:28:40 PST
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Find More Gps Products

By Bradford Parkinson
Vice-chair, U.S. PNT Advisory Board

In the coming months, the U.S. Federal Communications Commission (FCC) may allow high-powered, ground-based, communication transmitters to broadcast at a frequency near GPS L1. U.S. Department of Transportation (DOT) tests have shown that such transmitters effectively become jammers for many existing GPS receivers.

I believe that this possibility is the greatest current threat to the position, navigation and timing (PNT) community.

L1 is the primary band for GPS as well as for similar GNSS. For example, the international signal called L1C is to be centered at L1, albeit with wider spreading than the current L1 civil signal, C/A.

Why is this of critical importance? An economics study that only considered a small subset of benefits concluded that the U.S. alone realized $ 65 billion per year in direct economic value. A more complete recent study for the UK, extrapolated to the U.S., estimated the total impact of the loss of GPS to be over $ 3 billion per day for a five-day outage — a far greater rate. Virtually all GPS applications rely on the signals at L1. Thus, any threat to GPS is not simply an inconvenience, it would have great

  • Updated atlas contains maps of every U.S. state.
  • Each map is 35 percent larger than the average atlas version.
  • Features over 350 detailed city insets, national park maps and a comprehensive, unabridged index.
  • Road construction projects and updates are located conveniently above each map.
  • Mileage chart shows distances and driving times between 77 North American cities and national parks.
Give road-weary eyes a break with this spiral-bound Large Scale edition featuring all the accuracy you've come to expect from Rand McNally, only bigger. Updated atlas contains maps of every U.S. state that are 35% larger than the standard atlas versi

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United States US-USA Wall Map Poster Classic Blue Edition by Swiftmaps

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82x 59cm Travel Tracker Big Scratch Off World Map Poster Country Flags US States
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  • Expand your laptop with GPS capability
  • Compact, moisture-resistant receiver
  • Powered by 4 AA batteries
  • Included software features voice-navigation
  • Displays your location and position on street-level maps
With the DeLorme Earthmate GPS receiver and Street Atlas USA 6.0 software, you'll never get lost again. Combined with any Macintosh laptop, the Earthmate receiver will show your location on detailed Street Atlas maps. You'll be even more mobile, with

List Price: $ 179.95 Price:

(NIB) Rand McNally OverDryve 7c - 7" Tablet/GPS Hybrid - "BRAND NEW"

$75.00
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Garmin Nuvi 1490LM GPS Navigator———2018 Maps
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Antenova Ltd., manufacturer of antennas and RF antenna modules, has launched a new compact, all-in-one active GNSS antenna, part number M20047-1, at the Consumer Electronics Show (CES) show, Jan. 9-12, in Las Vegas.

The M20047-1 antenna adds another option to the company’s existing range of positioning antennas and modules.

It operates in the 1559–1609 MHz bands, and offers designers a useful, space-saving option for small tracking devices.

It’s key features are the active components, the built-in LNA and filter, which act to boost the signal to the GNSS processor in environments where there is a restricted view of the sky and line-of-sight to the horizon is difficult. With the LNA and filtering already built into the antenna, designers will not need to add them, and can save space on their PCB.

The M20047-1 is a very low profile rigid FR4 antenna measuring 7.0 x 7.0 x 1.1 millimeters, making it suitable for use in small tracking devices. It is suitable for tracking all kinds of moving objects, telematics and wearable sports devices.

The M20047-1 antenna is named Active Sinica and is an alternative to Antenova’s existing Sinica antenna, part no SR4G008, which is marketed for accurate positioning.

Antenova’s antennas …