SO WHICH IS IT ? "EVEN IF THEY TRANSMIT"
Looks like the retarded ProTrolleus needs to be walked through things
again.
I hope that in your next life you are endowed with more brains than
that of a gnat.
ALL GPS receivers have some chrono/position logging function.
If an idiot makes one and calls it a "tracker", there may or may not be
a transmitter unit incorporated into it to send back log entries to a
remote server, where a third party could use the data to "track" the
location of the operating "tracker" system.
The GPS unit utilized is still a component of the system, not the
system itself.
YOU ARE SAYING THAT THEY RECEIVE THE SIGNAL MAGICALLY AND
INDEPENDENTLY LIKE A TUNED IN RADIO
Basic concept of GPS (Quoted From Wikipedia)
A GPS receiver calculates its position by precisely timing the signals
sent by the GPS satellites high above the Earth. Each satellite
continually transmits messages which include
* the time the message was transmitted
* precise orbital information (the ephemeris)
* the general system health and rough orbits of all GPS satellites
(the almanac).
The receiver utilizes the messages it receives to determine the transit
time of each message and computes the distances to each satellite. These
distances along with the satellites' locations are used with the possible
aid of trilateration, depending on which algorithm is used, to compute
the position of the receiver. This position is then displayed, perhaps
with a moving map display or latitude and longitude; elevation
information may be included. Many GPS units show derived information such
as direction and speed, calculated from position changes.
Three satellites might seem enough to solve for position, since space has
three dimensions and a position near the Earth's surface can be assumed.
However, even a very small clock error multiplied by the very large speed
of light[22]—the speed at which satellite signals propagate—results in a
large positional error. Therefore receivers use four or more satellites
to solve for the receiver's location and time. The very accurately
computed time is effectively hidden by most GPS applications, which use
only the location. A few specialized GPS applications do however use the
time; these include time transfer, traffic signal timing, and
synchronization of cell phone base stations.
Although four satellites are required for normal operation, fewer apply
in special cases. If one variable is already known, a receiver can
determine its position using only three satellites. (For example, a ship
or plane may have known elevation.) Some GPS receivers may use additional
clues or assumptions (such as reusing the last known altitude, dead
reckoning, inertial navigation, or including information from the vehicle
computer) to give a degraded position when fewer than four satellites are
visible (see,[23] Chapters 7 and 8 of,[24] and [25]).
GPS receivers pick a few satellites and prove position based on the
arrival times of each satellite's signals.
WHY ARE THEY "DAMNED THINGS"
Why are you a retarded Usenet troll?
IS THERE A RELIGIOUS SECT AFTER THEM
There should be a gene pool clearing crew after you and yours.
IS SATAN IN POSSESSION OF THEM
It certainly appears that he has influenced you.
WHY DID YOU FEEL COMPELLED TO ANSWER THIS POST ?
None of your goddamned business, troll boy.
You are a goddamned utter retard.
