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Satellite Logic is a leading,
authoritative source of information in
the Satellite Industry. Located in the
heart of the Silicon Valley, Satellite
Logic provides one of the most
valuable and comprehensive
knowledge bases on the Satellite
market! This is a primary Worldwide
information center which enables our
clients to analyze, evaluate, inquire
and select their best tailored
solutions. Our company sets the
industry standards for targeted
buying leads, reflecting a dramatic
advance over traditional marketing

The recreational GPS user community is growing with new services
and products being offered every day. Some of the common users are
backpackers, fishermen, hunters and outdoorsmen all of who are now
viewing a GPS receiver as standard equipment. Some vehicles now
offer GPS tracking capabilities in conjunction with onboard digital maps
that pinpoint your location and provide directions to your destination. A
newer service being offered combines cell phone and GPS technology.
This service tracks your vehicle so you can call for directions to your
destination even if you don’t know where you happen to be at the
moment. It can also detect if your airbags have been deployed or can
dispatch emergency personnel as needed. If your vehicle is stolen, the
service can aid police in locating your vehicle quickly.

Several factors will affect the accuracy of your readings. Visibility or
line of sight is crucial, since at least four satellites are needed to
accurately locate your position. Buildings, mountains and even tree
canopy can affect how many satellites you are “seeing” and may
prevent you from “seeing” enough satellites to use in deciphering your
location. Since the pseudorandom signal sent by satellites resembles
electrical noise, receivers at times actually have trouble distinguishing
the signal from “true noise” in space caused by solar flares or other
naturally occurring events. Good receivers are better equipped to
decipher the noise and filter it out. Nevertheless it is a distorting factor.

Apart from the extensive military uses, the GPS is heavely used for
commercial needs. The commercial sector is laden with GPS
applications. GPS receivers can be found in fire engines, police cars,
airplanes, boats, construction equipment, movie cameras, fleet
vehicles, and farm equipment, just to name a few. They are used for
surveying, construction, mapping, agriculture, vehicle theft tracking,
digital information transfer security, environmental, archeological and
other uses. Our transportation infrastructure, for instance, is heavily
dependent upon GPS for tracking and navigation of airplanes, marine
traffic, and land vehicles such as trains.

The accuracy levels of commercial applications vary, although the
disabling of SA has helped by making higher accuracy levels more
obtainable in general. Therefore, accuracy is dependent upon use,
and there is a direct correlation between level of accuracy and price.
The greater the accuracy required, the more expensive the equipment,
and also the more expensive the training and maintenance cost. Some
commercial receivers can be purchased for a couple of thousand
dollars with an accuracy from one to three meters, while survey grade
equipment may run $5,000 to $40,000 per receiver and have an
accuracy of just a few centimeters for DGPS and less than a cm in
static mode.

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