The Global Positioning System (GPS) is a worldwide radio-navigation system formed from a constellation of 24 satellites and their ground stations. GPS uses these "man-made stars" as reference points to calculate positions accurate to a matter of meters. In fact, with advanced forms of GPS you can make measurements to better than a centimeter! In a sense it is like giving every square meter on the planet a unique address.

Here's how GPS works in five logical steps:

The basis of GPS is "triangulation" from satellites.

To "triangulate," a GPS receiver measures distance using the travel time of radio signals.

To measure travel time, GPS needs very accurate timing that it achieves with some tricks.

Along with distance, you need to know exactly where the satellites are in space. High orbits and careful monitoring are the secret.

Finally you must correct for any delays the signal experiences as it travels through the atmosphere.

Five broad categories of GPS application:

Location – determining a basic position

Navigation – getting from one location to another

Tracking – monitoring the movement of people and things

Mapping – creating maps of the world

Timing – bringing precise timing to the world

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TAG 20 manual Operating Your Tablet PC

20 specifications

The TAG 20, a notable addition to the world of luxury watches, represents a perfect blend of craftsmanship, technology, and innovative design. This timepiece is not just a tool for keeping time; it is a statement of elegance and performance that appeals to both watch enthusiasts and everyday users alike.

One of the standout features of the TAG 20 is its robust construction, designed to withstand the rigors of daily wear while maintaining a sophisticated appearance. The case is typically fashioned from high-grade stainless steel or titanium, providing both durability and a lightweight feel. Its water resistance is a key attribute, often rated up to 200 meters, making it suitable for a variety of water activities without sacrificing style.

The dial of the TAG 20 is another point of interest, featuring luminous markers that ensure readability in low-light conditions. The use of sapphire crystal not only enhances clarity but also offers resistance to scratches, ensuring that the watch retains its pristine look over time. The TAG 20 also incorporates a chronograph function, appealing to sports enthusiasts who appreciate precision timing and accuracy in their activities.

At the heart of the TAG 20 is a sophisticated movement, often powered by an automatic caliber or a highly accurate quartz mechanism, providing reliability and precision. This technological advancement ensures that users enjoy a seamless experience whether they are in casual settings or more formal engagements.

The strap options for the TAG 20 are diverse, catering to different personal styles and preferences. From classic stainless steel bracelets to sporty rubber straps, the versatility of the TAG 20 allows it to transition effortlessly between occasions. This adaptability is further enhanced by various color and finishing options, making it easy to find a model that suits individual tastes.

Moreover, the TAG 20 integrates advanced smartwatch features in some models, including connectivity with smartphones to track fitness metrics and notifications, thus merging traditional horology with modern technology. This fusion is indicative of the brand's commitment to evolving with the times while retaining its heritage.

In conclusion, the TAG 20 stands out due to its robust design, advanced technology, and versatile styling options. It represents a hallmark of modern watchmaking, making it an ideal choice for those who value both functionality and sophistication in their timepieces. Whether worn on a casual day out or during a formal event, the TAG 20 is sure to impress with its unique blend of features and timeless elegance.