A people Finder or personal locator, is a system that sets in real time its geographical position via GPS or triangulation of GSM antennas, and transmits it to the user or to the central server via GSM, radio or satellite. We can distinguish two types of people Locator, based on GPS devices and based on mobile phones, while its widespread use to locate employees, minor children, persons of advanced age or tele. Features a people Finder is a system that basically performs two functions, geo – positioning your location and transmit the coordinates. Location technology: a people Finder can use different technologies to determine their geo-positioning, such as GPS (the most usual, present practically in all devices), triangulation of antennas GSM (analyzes the signal strength of the GSM cells of the antennas of mobile phone coverage, used in mobile phones) or by triangulation of the signal by the rescue Cospas-Sarsat satellite system (used in the radio-balizas for emergencies). These technologies are not mutually exclusive with each other, being common to a people Locator use several simultaneously. With respect to coverage, systems based on GPS and Cospas-Sarsat satellites cover almost all of the land, although they may have areas of shadow, while the GSM coverage is much more limited. Telecommunications technology: once determined its position, people Locator must transmit it through a phone call, a message text, email, SMS or alert, and can use various technologies, as GSM mobile phone, satellite phone or radio frequency. Generally each device incorporates a single transmission technology, offering greater coverage via satellite followed by radiofrequency and GSM mobile telephony.
Types there are basically two kinds of people Locator: based people Locator at GPS device: is an electronic device equipped with a GPS receiver chip whose main function is to the act as a locator. You can additionally implement other positioning as GSM triangulation or radio-baliza systems to increase its functionality. They generally have a single system of transmission of information, whether GSM, via satellite or radio frequency. People Locator based on mobile phone: is a software application that is installed as an application on a mobile phone (or) on any other device mobile like PDA, notebook or tablet PC and locate its position either by GSM triangulation or GPS (if available). People Locator applications is an increasingly popular device and has numerous applications, and locate employees, children, elderly people, athletes, travel adventure, security, Tele-assistance or control of people at risk (disability, Alzheimer, or battered women). With respect to the modes of operation, people Locator generally available on automatic mode and manual mode activated by the user, remote mode upon request by SMS or call either by built-in sensors or programming. Source: People original author and source of the article locator