Bluetooth GPS Receiver for computer
The Global Positioning System (GPS) works on the principle that if you know your distance from several locations, then you can calculate your location. The known locations are the 24 satellites located in six orbital planes at an altitude of 20,200Km. These satellites circle the Earth every 12 hours and broadcast a data stream at the primary frequency L1 of 1.575GHz which carries the coarse-acquisition (C/A) encoded signal to the ground. The GPS receiver measures the time of arrival of the C/A code to a fraction of a millisecond, and thus determines the distance to the satellite.
TeleNav GPS Receiver
Get the most out of your wireless investment
Just because your cellphone, BlackBerry or smartphone does not have built-in GPS capabilities does not mean that you’re at a loss. With the TeleNav GPS Receiver, you can enjoy all the benefits of GPS on your mobile device.
The TeleNav GPS Receiver is designed to work with TeleNav GPS Navigator. The small, matchbox-sized receiver sits securely on your car’s dashboard and communicates wirelessly through Bluetooth to your mobile device. The GPS receiver contains the SiRFstarIII™ architecture and is designed to provide fast, superior location performance.
The TeleNav GPS Receiver is an ideal companion to your mobile device, allowing you get the most out of your wireless investment.
Bluetooth GPS Receiver
The TomTom Bluetooth Wireless GPS Receiver uses technology to eliminate the need for connecting cables, and a new high performance GPS antenna to ensure the best possible reception wherever you go.
The Bluetooth GPS receiver has a high capacity battery that lasts up to 5 hours on a single charge. The high performance GPS receiver is ideal for use in urban environments. It can be configured to work with a variety of Pocket PC, Palm devices and Smart mobile phones. On the road or walking around the city streets, it will make sure you find your way with ease.
Dimensions:
• Length: 3.35” / 87.8mm
• Width: 1.69” / 43mm
• Height: 0.59” / 15.1mm
• Weight: 2.4oz / 68g
The Defense Advanced GPS Receiver (DAGR) is a handheld GPS receiver used by the United States Department of Defense and select foreign military services. It is a military-grade, dual-frequency receiver, and has the security hardware necessary to decode the encrypted P(Y)-code GPS signal.
The GPS Reference Receiver is a MicroSet accessory for people who need to measure high precision timepieces over weeks or months at a time. It consists of a GPS receiver, power supply, antenna, and a microprocessor interface to the MicroSet Clock Timer.
Though GPS receivers are usually used to tell you where you are, some of them also provide a highly accurate time reference. The GPS Reference Receiver provides a one second pulse derived from the GPS satellites that is accurate to one microsecond. This can be used by itself to calibrate your timer. But you can also plug a MicroSet optical sensor into the Reference Receiver and, with MicroSet, measure the drift of a precision one second pendulum relative to the reference signal. This allows you to detect drift as small as millionths of a second over any interval of time: hours, days, weeks, or months. Because the GPS reference signal does not vary by more than one microsecond, the the maximum error of your measurements is equally small (see note below). And because the reference signal is immune to local temperature changes, it's an ideal way to measure subtle thermal effects on your clocks.
GPS receivers must have a special antenna to receive signals from the satellites they use. An appropriate antenna (shown below) is included with the Reference Receiver. This antenna works best with a clear view of the sky. It may not work indoors unless it is next to a window. Even then it may lose the satellite signals periodically. This will not interfere with your measurements if it happens for short periods because the internal timebase of the GPS receiver is trimmed to be accurate when the satellites are not in view. When the signal is restored, it is in perfect phase with the original signal. If you locate the antenna outside with a clear view of the sky you can be assured of uninterrupted reception.
Spectec's SDG-812 2-in-1 Bluetooth GPS Receiver with a memory slot is new in the PIC Accessory store. This interesting device combines a Bluetooth GPS unit with a microSD memory card slot. The GPS portion uses a Bluetooth connection while taking its power from the host device. The memory card slot provides you with expansion memory access while occupying in the usual SD slot. The SDG-812 includes the most recent 20 channel ultra highly sensitive SiRF StarIII GPS chipset.
The Spectec SDG-812 sells for $89.95 USD, shipping is available worldwide. It is compatible with the Windows Mobile powered Treo 700w and 700wx.
UPDATE: Conklin Systems has developed a driver that enables the Spectec SDG-812 GPS unit to function with Palm OS Powered devices.
Conklin Systems page states:
CS SDrv is a power management application for the Palm SD slot, specifically designed to power the Spectec SPG-812 ultra-small SD slot GPS. There are no batteries, no cables - the entire GPS plugs directly into your Treo or Palm's SD slot!
Based on the ultra-low power SiRF III GPS chipset, this is the most amazing Palm GPS ever. Or it would be, if it worked. Unfortunately PalmOS was incompatible with this unit - so we developed CS SDrv! CS SDrv isn't Spectec-specific, so it could be used to power other SD-slot powered devices as well.
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