Posts Tagged ‘Handheld GPS’
Father’s Day is fast approaching, and a lot of people are still searching for that perfect gift for dad. While dads have different hobbies, most tend to like gadgets and gizmos that have practical (and sometimes impractical) uses. Consider these fun gifts for Father’s Day:
~USB Drink Warmer/Cooler – these fun USB devices can warm dad’s coffee or cool his beer at the computer, and are a whole lot of fun.
~Leatherman – the classic gift for dad on Father’s Day, a Leatherman multi-tool never goes out of style for the dad who likes to be a wiz around the house.
~Cobra Handheld GPS - for dads who enjoy the outdoors, there’s nothing more useful than having a GPS device for camping, fishing, and hunting.
There’s nothing worse than being lost, especially whenever you’re hiking in the woods. This scenario happened to me when I was on my honeymoon and it was terrible. My husband and I had planned a month-long hike along the Appalachian Trail after our June wedding and we had our trek mapped out.
Little did we know that it was so easy to get lost within that great expanse of trails. Sooner than we knew it we were lost and it was raining. It took us 12 hours just to hike back to the main trail. Next time we plan a hiking trip we will be sure to bring one of those digital compass systems we see on television all the time.
I recently moved here to Seattle, and it’s been kind of difficult finding my way around the city. Near the end of the week, I found myself having nothing to do on Friday and Saturday night because I don’t know many people yet. My friend from back east recommended I buy a Garmin handheld GPS. I asked him “Buy a GPS? How is that going to help me find something to do on the weekend?” It turns out that newer GPS units provide more than just directions and simple navigation, they can also find local restaurants, nightclubs, and even theatres.
So I caved and bought a Garmin GPS and have since grown quite attached to it. The first Friday I found a great bar downtown, met a few people, and then we went out to see a movie. I even used my GPS to find out the show times! If you’re new to a city, a GPS unit is essential. You’re sure to meet new people quick provided you know where to look, and a GPS is just the tool to help you find the happening places around town.
The first satellite navigation system, Transit, used by the United States Navy, was first successfully tested in 1960. Using a constellation of five satellites, it could provide a navigational fix approximately once per hour. In the 1970s, the ground-based Omega Navigation System, based on signal phase comparison, became the first worldwide radio navigation system. GPS requires the equations of general relativistic corrections to these atomic clocks in satellites for sufficient accuracy. The general relativistic equations correcting signals of atomic clocks in satellites were first published in 1956 by Friedwardt Winterberg.
The design of GPS is based partly on similar ground-based radio navigation systems, such as LORAN and the Decca Navigator developed in the early 1940s, and used during World War II. Additional inspiration for the GPS came when the Soviet Union launched the first man-made satellite, Sputnik in 1957. A team of U.S. scientists led by Dr. Richard B. Kershner were monitoring Sputnik’s radio transmissions. They discovered that, because of the Doppler effect, the frequency of the signal being transmitted by Sputnik was higher as the satellite approached, and lower as it continued away from them. They realized that since they knew their exact location on the globe, they could pinpoint where the satellite was along its orbit by measuring the Doppler distortion.
Initially the highest quality signal was reserved for military use, while the signal available for civilian use was intentionally degraded (“Selective Availability”, SA). Selective Availability was ended in 2000, improving the precision of civilian GPS from about 100m to about 20m. In a contemporary sense, GPS is used often in vehicles and portable devices like the Bushnell Handheld GPS.
To enjoy more of the outdoors, never leave the house without your trusty navigational gear, maps and compass. A GPS navigation system is the latest device to give you accurate directions anywhere in the world. This global positioning system is a portable hand-held computer that will give you comprehensive and accurate information about a particular environment or area you want to explore or discover. All information is pre-loaded to your GPS.
In an urban setting, a GPS system can give you topographical information, streets and major road networks. It can also direct you which way to go and the distance to each location. It can also give you major landmarks and names of buildings. In an outdoor setting, a personal GPS tracker can give coordinates and altitudes.