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Russia Requires WiFi Registration
While WiFi wasn’t as broadly unlicensed in Russia as it is in most other industrialized nations, your can not find wifi antenna anywhere a state regulator exempted indoor use in certain bands from registration. The Mass Media agency apparently believes that it has the authority to compel this, although there’s some doubt by observers as to whether it really falls in their purview.
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Bluetooth Receiver

How useful when you take of Bluetooth Receiver Products.
We provide a comprehensive range of Bluetooth Receiver Products that match the strict quality requirements of International market which has earned our company the distinct reputation of being a quality oriented Taiwan Exporter of Bluetooth Receiver Products. We are recognized as one of the leading traders in this sector due to our capability to supply impeccable Bluetooth Receiver Products to our customers. We laid our foot years back & ever since we are striving to deliver in our products innovation, competitive pricing & quality driven customer satisfaction.

Global Positioning System was invented by Ivan Getting and U.S. Department of Defense. GPS is related to satellite navigational system, which is mainly designed for navigation application. It is now used as a timing tool. Six in each of three orbital planes spaced 120º apart out of eighteen satellites and their ground stations forms GPS. To calculate geographical positions GPS uses satellites as reference points. GPS is used as a pinpoint in any ship or submarine on the ocean and to measure Mount Everest. GPS receivers have created with few integrated circuits so that it becomes very economical to use. Today GPS is used into planes, boats, construction equipment, cars, movie making gear, farm machinery and even laptop computers.

GPS satellites are placed high enough to avoid the problems related with land based systems and then also it provides accurate position anywhere in the world. The positions, which are incorrect determined by GPS satellite signals produce accuracies in the range of 50 to 100 meters. By using differential correction technique users can get positions accurate to within 5 meters or less.

There are varieties of applications for GPS because GPS units are smaller and less expensive. GPS assists pilots and drivers in pinpointing their locations and avoiding collisions in transportation applications. Farmers use GPS to control accurate distribution of fertilizers and other chemicals in farm. Recreationally, GPS provides accurate locations and act as a navigation tool for hunters, hikers and boaters.

GPS has its greatest application in the field of Geographic Information Systems (GIS). GPS provides any point on earth with a unique address with some consideration of error. A GIS is descriptive database for the specific part of the earth. GPS tells accurate position by using co-ordinates X, Y, Z while GIS tells X, Y Z is a tree or a spot in a ocean. GPS tells us "where" while GIS tell us "what". GPS/GIS are providing the way to locate, organize, analyze and map of resources.

How GPS Determines a Location
By applying mathematics distances between the receiver and the position of 3 or more satellites are determined. Assuming that the positions of the satellites are known in advance and the location of the receiver is calculated by determining the distance from each of the satellites to the receiver. GPS takes these references and measured distances and "triangulates" an additional position.

GPS satellites are orbiting at an altitude of 11,000 miles from earth. Satellites can be adjusted periodically by large land-based radar systems. Therefore locations of the satellites are known in advance. GPS receivers store this orbit information for all the GPS satellites is known as an almanac. Each GPS satellite broadcasts the almanac continually. Then GPS receiver automatically collects this information and stores this information for future use.

The Department of Defense continually checks the orbit of the satellites looking for deviations from predicted values. Any deviations, which are caused by natural atmospheric phenomenon such as gravity are known as ephemeris errors. When ephemeris errors are determined then the errors are sent back to the satellite, which in turn broadcasts the errors as part of message and supply this information to the GPS receivers. By using ephemeris error data in conjunction with the information from the almanac, the position of a GPS satellite can be determined for a given time.

Logitech began marketing in 2005 a wireless headphone unit that works with any model of iPod that has a dock connector on the base. This feature is standard on all new models and is available on older models as well. The headphones use Bluetooth technology to connect to the iPod through an adapter that transmits the signal. They come with rechargeable batteries that supposedly can play up to eight hours of music per charge.

The wireless headset is very light and weighs only 3.2 ounces, with the adapter unit weighing less than an ounce. iPod controls are provided on one of the earpieces, so there is no need to return to the iPod to adjust the volume or move through the play list. The iPod can be left sitting on a counter or on a desk, and the headphones will pick up the signal for up to 30 feet away.

Logitech also markets a wireless music receiver and transmitter that turns your current stereo into a receiver and set of speakers for your iPod. It comes with its own rechargeable batteries so it doesn't drain your iPod. The receiver unit simply plugs into your stereo system and the transmitter onto your iPod. The system works with any iPod or MP3 player with a standard 3.5mm headphone output.

The benefit of this system is that you can use it to make your existing speakers wireless without having to purchase additional equipment. It is easy to plug in and use so you can easily move to other rooms in the house. The only drawback is the 30-feet distance restriction between the receiver and the transmitter.

Macally

Macally designed a Bluetooth based BlueWave iPod headset that connects to the iPod through a transmitter plugged into the iPod's headphone port. One issue with the BlueWave system is that the transmitter unit doesn't use the iPod's connector for power but two non-rechargeable AAA batteries. Another issue would be the plastic notch situated by the headphone jack that prevents the transmitter from wobbling on the iPod's top and which you will need to remove if you own an iPod shuffle or a first or second generation iPod.

The signal's range should be around 30 feet but it varies greatly depending on the environment you are in, especially if doors or walls stand in the way. The headphones can provide up to eight hours of interrupted music depending on volume level and other factors. They are also powered by two non-rechargeable AAA batteries.

With the BlueWave system you can also wirelessly stream music from your iPod by connecting the headphones to the home speaker system with a RCA patch cable that fits in the line-out jack from the headphones.

Oregon Scientific

Oregon Scientific released in 2005 a very interesting wireless speaker system designed for the iPod, the iBall. The speaker is shaped like a bowling ball and it connects to a transmitter dock, that holds the iPod, through 2.4 Ghz wireless technology, with adaptive frequency hopping spread spectrum. The signal range should be up to 100 feet and the rechargeable batteries provide up to 8 hours of music on a single charge. It is compatible with iPods, iPod photos, iPod nanos, and iPod minis.

The iBall has a built-in remote for the iPod which you can use even if the iPod is not in the room. The speaker has a round LCD display that you can use to change volume and skip tracks, find out the time, wireless signal strength, battery power, play/pause status.


By measuring the amount of time a radio signal takes to travel from the satellite to the receiver, GPS determines distance between a GPS satellite and a GPS receiver. Radio signals travel with speed of light. If the amount of time the signal takes to travel from the satellite to the receiver is known then the distance between the satellite and the receiver can be determined by using formula distance = speed x time. The signal's travel time can be determined, if the exact time when the signal was transmitted and received are known.

For synchronization purpose, the satellites and the receivers use very accurate clocks so that they generate the exactly same code at exactly the same time. The code generated by the receiver can be compared with the code received from the satellite. The time difference between when the satellite generated the code and when the receiver generated the code can be determined by comparing these codes. This difference between times is the travel time of the code. This travel time is multiplied in seconds to 186,000 miles per second gives the distance from the receiver position to the satellite in miles.

We ensure high quality Bluetooth Receiver products by subjecting our Bluetooth Receiver products to stringent quality control measures during each stage of production and while dispatch.

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