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Posts Tagged ‘About’

Global Positioning System

The Global Positioning System (GPS) is the only fully functional Global Navigation Satellite System (GNSS). Utilizing a constellation of at least 24 medium Earth orbit satellites that transmit precise microwave signals, the system enables a GPS receiver to determine its location, speed/direction, and time.

Developed by the United States Department of Defense, it is officially named NAVSTAR GPS (Contrary to popular belief, NAVSTAR is not an acronym, but simply a name given by Mr. John Walsh, a key decision maker when it came to the budget for the GPS program[1]). The satellite constellation is managed by the United States Air Force 50th Space Wing. The cost of maintaining the system is approximately US$750 million per year,[2] including the replacement of aging satellites, and research and development. Despite these costs, GPS is free for civilian use as a public good.

GPS has become a widely used aid to navigation worldwide, and a useful tool for map-making, land surveying, commerce, and scientific uses. GPS also provides a precise time reference used in many applications including scientific study of earthquakes, and synchronization of telecommunications networks.

Simplified method of operation

A GPS receiver calculates its position by measuring the distance between itself and three or more GPS satellites. Measuring the time delay between transmission and reception of each GPS microwave signal gives the distance to each satellite, since the signal travels at a known speed – the speed of light. These signals also carry information about the satellites’ location and general system health (known as almanac and ephemeris data). By determining the position of, and distance to, at least three satellites, the receiver can compute its position using trilateration.[3] Receivers typically do not have perfectly accurate clocks and therefore track one or more additional satellites, using their atomic clocks to correct the receiver’s own clock error.

Since Apple’s iPhone plunged into the handy game realm, it has been more than a tool to keep friends close and updated. Targeting to compete with Sony and other portable gaming consoles, iPhone is the choice for gamers who want to be on the move and keep in touch with class and style.

iPhone is one of the portable gaming devices that is a better choice than an expensive gaming cartridge. Indeed, without spending that much, you can still the enjoy the same if not better quality games while on the road.

There are many mobile game websites out there, and new iphone games are being developed by the date. You can choose many kinds of genres in games, anything that suits your taste and trip.

When it comes to iPhone games, one of the video games developer to watch out is Beteo Games (http://www.beteogames.com).

One of the promising developers behind the game, Acmar Rising, made for people who want to enjoy combined first-person shooting with RPG ( role playing game) where you can play like Halo and upgrade like Final Fantasy, a game that promises to never bore you everywhere you are. This game grows its popularity all over the iPhone and itouch apps world.

With the success of Acmar Rising– well, rising, Beteo Games is set to release another exciting game for the Apple iPhone and iTouch in May 2009. iWrath, as it is called, promises ultimate iPhone gaming experience. Created with intense graphics and new ideas, pushing iPhone and itouch to a whole new level of fun and creativity for its users.

“There’s too much to learn!” “Everything changes so quickly!” “I just don’t understand!”

These are all common reactions to the overwhelming challenge of learning to use a personal computer. The volume of information, the pace of change and the intimidating technical language can make learning about computers seem like an unattainable and unrealistic goal.

However, with the right strategy, learning about computers doesn’t have to be impossible. In fact, thanks to numerous opportunities on the Internet, free computer learning courses are available to everyone and, with a structured approach; you can overcome the barriers to learning about computers and find yourself mastering computer skills quickly and painlessly.

The first step on your path to learning about computers is to tune out all of the ridicule from your friends, forget your precocious eight-year-old niece’s computer skills and focus on yourself. You can do this by defining what success means to you. Do this by setting a few compelling and attainable goals that are relevant to you and assigning them realistic timelines. Make sure these goals are observable and measurable so that you know when you’ve achieved them and can celebrate your success.

For example, if you’ve never touched a computer before, you might set a goal of being able to turn the machine on and to launch three of your favorite programs by the end of your first month of learning. Or you might focus on a specific area of learning about computers, such as navigating the Internet, and set a goal of being able to find two free computer learning courses on a program you would like to learn. Your first goal should be challenging, but not overwhelming. If you stay in your comfort zone, you won’t advance, but if you set goals you can’t achieve, you’ll quickly become discouraged. By achieving some success early on, you’ll be more motivated to challenge yourself to learn faster. This will also make learning about computers fun, which will keep your motivation at a high level.