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Wednesday, November 26, 2008

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Featured bluetooth gps ArticleBrief Introduction to GPS Receivers

By korsshih

GPS receivers are categorized into different types by its purposes, frequency and channel.

A. By Purposes

1. Aviation GPS receiver: It is mainly used in aviation of moving carriers. It tells locations and speed of the moving carrier in real time. Measured psychologically with C/A number, so its single positioning is less precise which is about +-25 MM. If affected by SA, the differences can be +-100 MM. The kind of GPS receivers is less expensive and widely used in various industries.

2. Ground GPS receiver: It is mainly used in precise ground and engineering measurement. It uses the value of carrier phase to measure the relative position, so the result is precise. The receiver is built complicatedly, so the price is highers.

3. Time transfer GPS receiver: It transfer time by highly precise satellite. It is usually used in the the observatory and wireless communication.

B. By Frequency

1. Single-channel GPS receiver: It only receives signal of L1 carrier wave and positions by value of carrier phase. It cant eliminate the affect of ionosphere delay, so it is only applicable for precision position of ultra short base line less than 15 KM.

2. Double-channel GPS receiver: It can receive carrier signals of both L1 and L2. With its differences to ionosphere delays, the delay of electromagnetic wave signal caused by ionosphere can be eliminated. Therefore, it can be used in precision position for thousands of kilometers.

C. By Channels: GPS receivers can receives signals transmitted from multiple GPS satellites at the same time. It uses antenna singal channel to separate the signals received and track, handle and measure individual satellite. The channels are divided into multi-channel receiver, serial channel receiver and multi-channel receiver.

About The Author

I am the author and webmaster of Rikaline Intemational (http://www.system-gps.com/). Rikaline Intemational is an Taiwan-based manufacturer of various types of GPS products, including GPS receivers, GPS watch and GPS engine boards. Furthermore, the engineers make efforts into developing the latest GPS devices that meets changing applications.

Another short bluetooth gps review

Tree cover is a special challenge to outdoor GPS use. Water in the trees absorbs GPS signals, making navigation difficult or impossible. A better "12-channel parallel" GPS receiver, and/or an external "amplified" antenna can vastly improve reception under tree cover, but you'll still lose coverage occasionally.

Blue Tooth GPS receivers are a by-product of the great combination of two interesting technologies. Devices with this technology have recently become more popular and newer models are being introduced at a greater pace than before as users become more familiar with them. There are more people who can vouch for the usefulness of Blue Tooth GPS receivers for various types of tasks. For the uninitiated, it might be a little challenging to select a suitable receiver. Fortunately, a lot of information is available on the Internet. You can do your research and due diligence before you purchase one for yourself. You can either get information regarding specific models or comparisons between various models with information regarding functions, features and prices.
Get a great new Magellan GPS

Right, you're not James Bond. To make GPS work for you, get a rough understanding of how the system works and a more detailed understanding of how your receiver is operated. Two hours of concentrated reading of the manual and playing with the receiver will give you a pretty good start. GPS is a very robust system: Whenever you get lost, blame it on yourself.
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More bluetooth gps Information

Write Here, Write Now: And you thought you were overloaded with information now, just wait. Hewlett Packard is working on a technology to let folks print messages in mid-air based on their location incorporating GPS technology. I find this stuff fascinating, even if no one seems to have thought of a good use for it yet. The first sentence of the article is right, though: "The kids are going to love this." in New Scientist via RCPL's Liblog]

When the ALA summer conference was in San Francisco in 1997, the SF Museum of Modern Art had a fascinating exhibit called Icons: Magnets of Meaning. I spent hours browsing through it, but one of the pieces that has always stuck in my mind was called @: Marking the Electrosphere . It talked about the meaning of that one little symbol. How it can define, place, and root you in the world, but at the same time let you be found anywhere. Integrated, widespread use of GPS is going to take this to a whole new level.

Qualcomm's Vision of the Wireless Future "When he finished, there were 20 brand-new, CDMA-based mobile handsets and devices arrayed on the table, the high-tech souvenirs of Belk's most recent trip to Hong Kong and Japan.... 'These are not PowerPoint slides,' Belk said. 'These are real devices that are already shipping in volume in Asia.' " at Business 2.0]

And there's the rub. When I do my presentations, that's all I have - pictures of prototypes or of devices not available in the U.S. Europe and Asia really are 18 months ahead of us in this area.

"Beale also discussed Qualcomm's gpsOne location technology.... It also opens the door for many new location-based services, such as traffic information and local weather forecasts. On Japan KDDI's network, there are already more than 20 location-based services available -- all of which are relatively inexpensive, costing less than $5 per month."

I'm looking forward to being able to travel and have information come to me automatically based on my location. For example, if I'm at a conference and I'm looking for a restaurant, I'd like my phone/PDA/whatever to know where I am and offer a list of nearby choices. Maybe it should tell me what movies or plays are on tonight and if there are still tickets available. You get the idea....

"Predictably, both Belk and Beale anticipate strong growth for the wireless industry as ever-more-compelling products and services become available and the industry settles on a single communication standard. How long will that take? Belk, whose career began in the personal computing business in 1983, likened the wireless industry today to the PC business of the 1980s. 'I wouldn't worry about the wireless industry yet, it's still relatively young,' he said. 'Just look how long it took the PC industry just to get to the point of standardized parallel cables.' "

Not to beat a dead horse, but the ebook industry is even younger than PCs, and PDAs have really only come into their own during the last few years. So don't count any of these technologies out just yet.