What is GPS?
GPS (Global Positioning System) is a system
based on navigation and at least require 24 satellites to made it up. There is
no subscription fee or setup charges for GPS, it works 24 hours a day no matter
what is the weather condition is. The US military was using this system a long
ago but they put it use for normal citizen in 1980's.
How GPS works?
GPS Satellites circle the earth in a
precise orbit, Twice in a day. Unique signal sends by each satellite and
orbital parameters that allows GPS Device to decode and precise location of the
satellite. Now with the help of GPS receiver the information sent by satellite
transliteration to calculate user's exact location.
The distance to each satellite by the
amount of time it takes to receive a transmitted signal measures by the GPSreceiver. The receiver can determine users position by with the help of
distance measurements from few more satellites.
Toll Free Number : +1 844-687-1001
GPS Can calculate 2-D and 3-D Position. Now
for calculate 2-D position and track movement, a GPS receiver must be locked on
the signal of at least 3 satellite and for 3-D position (latitude, longitude
and altitude) need 4 or more satellites in view. Generally, a GPS receiver will
track 8 or more satellites.
Once your
position has been determined, now the GPS unit will calculate other information,
Like:
1.Track
2.Trip Distance
3.Speed
4.Bearing
5.Distance of
destination
And others
How Accurate is
GPS?
Withe help of their parallel multiple
channel design now a days GPS receiver are extremely Accurate. Now the accuracy
of GPS can be affected by atmospheric factor and other sources. Now with the
help of wide area Augmenter System accuracy is improved by some Garmin GPS receiver.
By providing correction to the atmosphere this capability can improve accuracy
to better than 3 meters. There is no additional equipment is required to take
advantages of WAAS Satellite.
Other GPS
Systems:
Global navigation satellite system is the
other similar system to the world. GLONASS is a satellite constellation system
built by Russia. China is creating BEDOUIN while the European space agency is
creating Galileo. Now Garmin receivers track both GPS, Glonass and even
BEDOUIN.
Fit-bit vs Garmin: Both used to be same with many products
and directly compete with each other. Fit-bit has essentially cornered the
low-end smart watches and fitness tracker. Whereas the Garmin is far and away
the leader in the GPS Fitness. The future of fit-bit hardware is muddy because
fit-bit was acquired by google.
The GPS
satellite System: The GPS
space segment are orbiting the earth making by around 31 satellites. Within 24
hours they complete 2 orbits of our earth.
Some interesting
facts about GPS Satellites:
1.NAVSTAR is the
official name for USDOD GPS.
2.in 1978 the first
GPS satellite was launched.
3.In 1994 a full
constellation of 24 satellites was achieved.
4.Each satellite is
built to last about 10 years.
What is a
Signal?
At least 2 low power
radio signals transmitted by a GPS satellite. These signals can pass through
cloud, glass and plastic but cannot go through building and mountains and other
solid objects. Modern Receiver are more sensitive and usually track through
houses.
There are 3 different
type of information contain by GPS Signal.
1. Pseudo random
code: The information that is transmitting from the satellite is identifies
by this ID code.
2. Ephemeris
data: In order to determine satellite position and gives important information
about the health of a satellite from date and time.
3.Almanac Data:
It tells the GPS Receiver where each GPS satellite should be at any time throughout
the day.
GPS Signals
Error Sources:
Satellite signals pass through the
atmosphere as they are slow. In order to partially correct from this type of
error GPS System uses a built-in model ionosphere and troposphere delays. Tall
buildings or large rock surface can reflect of GPS signals before it reaches
the receiver, which increase the travel time of the signal and cause an error.
GPS satellites use atomic clock so a
receiver built in clock may have slight timing errors because it is less
accurate than atomic clock. Sometimes the satellite's reported location may not
be correct.
Tagline : Garmin Express, Garmin Express Support, Garmin GPS Update, Garmin Map Update,Garmin Express Map Update,Garmin Express Map Support etc.
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