The Science Behind Portable GPS Systems And How You Can Use Them Too!
By: Edwardo Mascasas -
The GPS or Global Positioning System is a "constellation" of 24
well-spaced satellites that orbit the Earth and make it possible
for people with ground receivers to pinpoint their geographic
location. The location accuracy is anywhere from 100 to 10 meters
for most equipment. Accuracy can be pinpointed to within one (1)
meter with special military-approved equipment. GPS equipment is
widely used in science and has now become sufficiently low-cost so
that almost anyone can own a GPS receiver.
The GPS is being used in science to provide data that has never
been available before in the quantity and degree of accuracy that
the GPS makes possible. Scientists are using the GPS to measure the
movement of the arctic ice sheets, the Earth's tectonic plates, and
volcanic activity.
GPS are much more applicable when they are eminently portable.
Usually, when people refer to portable GPS units, they mean
handheld units. Types of GPS devices such as these are most often
for biking, hiking, camping, sailing, fishing, skiing and exploring
in the untamed wilderness.
Portable Global positioning systems and accessories come in the
forms of hand held units, antennas, wristwatches, bike mounts, fish
finders, and more. Since nearly major GPS manufacturer makes
portable units, a lot of people are demanding for serious, strong
GPS units.
Portable GPS systems give user such data as longitude, latitude,
altitude, speed, and distance to destination or next stopping
point. Stopping points are called "waypoints," and they can be
programmed into the GPS unit, as can a number of other points.
There are a number of styles of portable GPS systems, so that
everyone can find the model and the price that is just right for
them.
Magellan, Garmin and Lowrance are among the top-quality major
brands portable GPS systems. GPS systems are surprisingly
affordable for the people who are looking into GPS technology for
the first time. Even the most basic GPS unit offers a wealth of
data to the user.
GPS units like maps are usually less comprehensive than those used
for driving and boating. Topographical maps are the most useful
maps for use in the wilderness which allow you to locate yourself
within your immediate surroundings and navigate over rough terrain.
However, not every unit comes with topographical maps. So if you
want them, just make sure you buy a unit that includes them.
Wilderness GPS units are example of portable GPS units which is
more or less accurate depending on their design and construction.
Units that utilize differential GPS are far more accurate than
those using standard GPS standard protocols. Also, units that use
dual frequencies and kinematic (On-The-Fly), real-time, signal
processing are more accurate than those using a single frequency
and static, post-processing.
There are optional features in Wilderness GPS DEVICES that are less
necessary for other applications but extraordinarily helpful for
wilderness applications are included compasses, barometers, and
altimeters. Some portable units can even receive weather forecasts
so you will never be caught off guard by a sudden storm.
Furthermore, it is a devices ability to communicate with other
receivers in the area to send emergency voice communications and
the ability to communicate with other receivers in the area to send
emergency voice communications and the ability to broadcast an
emergency beacon should you find yourself cut off and distress.
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