Navigational Devices
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- Category: Consumer Electronics > Navigational Devices
- Bluetooth: Yes
- Screen Size: 1.8"
- $100-$250
Navigational Devices
What is GPS?
The Global Positioning System (GPS) is a satellite-based navigation system made up of at least 24 satellites. GPS works in any weather conditions, anywhere in the world, 24 hours a day, with no subscription fees or setup charges. The U.S. Department of Defense originally put the satellites into orbit for military use, but they were made available for civilian use in the 1980s.
How GPS works
GPS satellites circle the Earth twice a day in a precise orbit. Each satellite transmits a unique signal and orbital parameters that allow GPS devices to decode and compute the precise location of the satellite. GPS receivers use this information and trilateration to calculate a user's exact location. Essentially, the GPS receiver measures the distance to each satellite by the amount of time it takes to receive a transmitted signal. With distance measurements from a few more satellites, the receiver can determine a user's position and display it electronically to measure your running route with a GPS Watch, find a way home with a Car GPS or adventure anywhere with a Handheld GPS.
Once your position has been determined, the GPS unit can calculate other information, such as:
- Speed
- Bearing
- Track
- Trip distance
- Distance to destination
- Sunrise and sunset time
- And more
I've been an IT consultant for most of my life and one of our mantras is -fast, good, and cheap. you never get all three!- Somehow CompSource does it. I'd ordered a portable air conditioner from two other vendors and both strung me along and finally cancelled my order *after* charging me since they apparently couldn't either manage stock or suppliers properly. I eventually got my money back but I was worried up getting gouged with summer "on season" pricing. I found CompSource had a unit almost identical (different branding) and thought I'd give it one more try. To be honest it looked too good to be true. Price with shipping was over $100 less than the competition. I was shocked that it arrived almost as fast as I got the *tracking number*. I ordered on a Friday and got the FedEx tracking number on Monday from Rich Burson and had the unit Tuesday evening. This is a nearly 100lb 12K BTU beast that I would have expected to take at least a couple weeks to get. I sent a quick thank you email and who replies? The President of the company. Personally. Smart guy. I used to check Newegg first. Not anymore. Thanks! MikeMore Reviews
