Why does Tracker Security use cellular to relay GPS data?
GPS systems gain their latitude and longitude coordinates using data from satellites. The GPS transmitter then needs a communication link to relay that information to the mapping interface. This can be done using several methods:
GPS/Satellite: The device sends these coordinates by initiating a call using a satellite modem.
Pro: Nearly ubiquitous global coverage when outdoors
Con: Expensive monthly satellite contract required. Calls can only be completed when the transmitter is outside and the device has a clear connection to the satellites. Additionally, significant signal power is needed often requiring a large battery.
GPS/Cellular: The device sends these coordinates by initiating a call using the integrated cellular modem.
Pro: Data is passed reliably and inexpensively.
Con: Requires monthly cellular contract and only operates in areas with cellular coverage.
GPS/RF: The device sends these coordinates using radio frequency.
Pro: No additional communication infrastructure needed. Works 24/7 regardless of location or external factors.
Con: Short range system, generally one mile or less. Receiver must be in very close proximity.
Of these three options, Tracker Security selected using cellular communication to relay GPS points. Specifically, cellular GSM was selected because it has the largest worldwide footprint.
How does RF tracking work?
A radio frequency transmitter emits a pulse on its set frequency. A receiver on a matching frequency detects the pulse and signals the detection of the transmitter through an audible beep and/or via a series of bars on a display.
Based on the strength of the signal, and by using some basic tracking skills, a skilled user is able to locate an item from an initial reading of many miles away to within inches of its actual location.
When would I use RF versus GPS for tracking assets and people?
RF and GPS both have their own strengths when it comes to tracking items. Depending on the situation, you may want to use one, the other, or both. Tracker Security offers a free white papers discussing the
One technology is not the “best” for any or all purposes, but rather will provide you with information to decide which option is most appropriate for your current need. Please review RF versus GPS Tracking Options for more information. (Click to read more about comparing RF and GPS technology for tracking, locating and recovery.)
What mobile phones have been approved to use with the ReadyLarm mobile software?
Nokia 3250 / Nokia 5500 / Nokia 6110 Navigator / Nokia 6120 / Nokia 6120 Classic / Nokia 6290 / Nokia E50 / Nokia E60 / Nokia E61 / Nokia E61i / Nokia E65 / Nokia E70 / Nokia E75 / Nokia E90 / Nokia N73 / Nokia N76 / Nokia N78 / Nokia N80 / Nokia N82 / Nokia N91 / Nokia N93 / Nokia N95 / Nokia N95 8Gb Samsung SGH-i450 / Samsung SGH-i550 Sony Ericsson K800 / Sony Ericsson P1 / SonyEricsson C702 / SonyEricsson G900 / SonyEricsson K770 / SonyEricsson T650