GPS Demystified

#48 | 17:55 |

Lab Rats

Monday October 30, 2006

Andy and Sean show how the global positioning system helps you navigate using a melon and tomatoes.

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Show Notes

- GPS: Global Positioning System

- The first satellite navigation system became operational in 1960, and was used by the United States Navy.

- The first modern GPS satellite launched in 1978. All 24 satellites were in place by January of 1994.

- GPS satellites are located roughly 20,200 km above the Earth's surface.

- 3 satellites are necessary for exact position.

- The precision of the location derived will vary depending on the accuracy level of the receiver.

- Trilateration is similar to triangulation but uses reference points AND known distances for calculations.

- If your GPS unit has a fourth satellite capability, you can get your altitude.

- EXIF: Exchangeable Image File Format.

- EXIF information tags are stored right inside the image file.

- How Stuff Works: GPS Explained

- Navman iCN 320

- Mio C710

- Wherify

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