How do GPS tracking devices work?

The antenna must be able to look outside at a big slice of the sky, or the device wont work.

How does the implant in Green Xenon's head work? Does it have a wire tail that acts as an antenna? Is it just under the scalp?

They do not "transmit" at all.

GPS _receivers_ do not transmit.

GPS _trackers_ may transmit.

GPS Fleet Trackers do transmit, depends an which country on how they transmit.

Some use cell phones, some use direct wireless transmitters.

hamilton

Your package does not have any thing put in it or on it that GPS systems detect, otherwise, it would be an expense.. The package is placed on the truck and logged in on the computer as to which truck it's on. They simply track the truck! Via Cell or dedicated system..

They simply scan in/out at the pickup/drop off places.. The scanner logs it to the current position location.

There are two types of GPS trackers:

1. Those that record their coordinates every X minutes and are retrieed and read to determine the data - what you put in a car to track a teenage driver.

1. Those that can either send data autonmously or be queried remotely. These usually have a large antenna dome - what you see on trucks/trailers carrying valuable loads.

John

Those are PERIPHERAL sub-systems to a GPS system. GPS receivers do not transmit.

None of which make contact with any GPS hardware.

Many also transmit several vehicle condition data blips as well, so they can track and prevent breakdowns, and catastrophic breakdowns being the most important to avoid.

Still has nothing to do with GPS other than that GPS is referenced when the system records a new system status file and transmits it back to a central server, which makes vehicle tracking a no brainer. It can even fail to get a reading sometimes, and it would still have no effect on tracking as a new, good reading will soon follow.

I think we are agreeing here.

Glad to know I go it right. ;-)

hamilton

replace

Nope. There is no such thing as a "GPS Tracker" other than some lame moniker some lame maker slapped onto one of their systems, which others then adopted. A system that USES a GPS receiver.

There are transmitting trackers, which USE a GPS receiver to gain a position resolution. Tying them together by naming the entire system using the receiver name as a key identifier doesn't change the facts. They are separate systems.

replace

The fact is that at best, the damned things are nothing more than a trip log, even if they transmit their poll results to a remote storage location.

e a

to replace

vers do not

SO WHICH IS IT ? "EVEN IF THEY TRANSMIT"

YOU ARE SAYING THAT THEY RECEIVE THE SIGNAL MAGICALLY AND INDEPENDENTLY LIKE A TUNED IN RADIO

WHY ARE THEY "DAMNED THINGS" IS THERE A RELIGIOUS SECT AFTER THEM IS SATAN IN POSSESSION OF THEM

WHY DID YOU FEEL COMPELLED TO ANSWER THIS POST ?

I AM PROTEUS

replace

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.

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 you a retarded Usenet troll?

There should be a gene pool clearing crew after you and yours.

It certainly appears that he has influenced you.

None of your goddamned business, troll boy.

You are a goddamned utter retard.

Lo Jack doesn't exist

You probably do not even know how Lo Jack works either.

It too has not a goddamned thing to do with GPS.

Lo Jack is ONLY a radio locator beacon, and nothing more.

It sends OUT pings and that is what the cops find. There is no data transmitted at all. The pings only consist of a carrier and unique ID pulsing. The Lo Jack Transmitter gets turned on when a satellite or ground based transmitter sends out commands to turn on a specific Lo Jack device. The one that is in the car that just got reported stolen. All the other Lo Jacks do not turn on because they are initialized by the transmitter in a unique ID manner.

Lo Jack on a laptop simply works by reporting the laptop's assigned IP address to the Lo Jack security servers. They then locate that IP address' 'subscribed' 'owner', and execute a search warrant on that person, or resolve who the culprit is until they finally get him.

ll

SHIUT UP

I AM PROTEUS