JIMI Electronic

Through the developments of a few decades, GPS is now even known by school children. GPS tracker has been very widely applied in several areas, such as air, sea and land navigation, low earth orbit (LEO) satellite orbit determination, static and kinematic positioning, flight-state monitoring, as well as surveying, etc. GPS has become a necessity for daily life, industry, research and education. GPS receivers are designed with many built-in features but only a few are essential for wilderness navigation. Any feature that requires the receiver to stay switched on for prolonged periods should be used sparingly as conserving battery power is an important consideration, especially in cold weather. Under certain conditions, built-in or optional features can enhance the performance of a GPS receiver. Recent innovations in GPS technology have introduced ways to enhance precision, availability, and reliability in advanced receivers. These innovations address mitigation of multipath errors, r...

GPS Visualizer is a slick, easy-to-use Web-based mapping program, written by Adam Schneider, that allows you to upload GPS waypoints and track files to a Web site and then overlay them on topographic and other types maps. GPS Visualizer relies on online sources that provide free topographic maps, aerial photos, satellite images, and street maps. Unlike many other sites that are limited to making maps of the United States, GPS Visualizer can create maps of Canada, Europe, and other places in the world. GPS Visualizer has a number of powerful options for creating customized maps. In this section, I describe how to make a map using some of the Web site’s basic features. After you master the general procedure, you can experiment on your own with some of the other advanced options. Map aiding is most useful when map matching has determined that the vehicle has just turned a corner, in which case its position is in close proximity to the intersection of two streets of a known location in t...

One major challenge with map matching before electronic tracker was available was the initialization of the system when the starting position was not known. In early navigation systems, the user sometimes had to be prompted to enter the current position. Of course this was difficult if the user did not know where they were! With GPS, the absolute position is readily determined, and, in time, GPS receivers were added to navigation systems. Initially, GPS was only used to get the DR/map matching system started or to detect large errors. Then systems emerged where the GPS/DR trace was compared with the digital road map in order to find the most probable location of the vehicle. Today, most navigation systems rely primarily on GPS and use DR and map matching to correct GPS errors and bridge the coverage gaps. A robust map matching implementation uses confidence measures to determine all possible road segments in the map on which the vehicle could be traveling. In order to support map ma...

A Global Positioning System (GPS) is a key component of a present day intelligent vehicle. tracker for vehicle can be used to find absolute position and velocity. This is very useful for an autonomous vehicle that has access to a precise map, as it can understand where it is with respect to its destination and with respect to the road network or, for an off-road vehicle, topographic features and obstacles. This information is needed, for example, to compute optimal routes or driving directions. On- or offroad, when combined with a vehicle-to-vehicle wireless communication system, it can also provide relative position and relative speed information. Autonomous vehicles use all the standard sensors available in a car for self-sensing. Thus speed sensing is available, and variables that are measured in the engine and powertrain or are related to the brakes can be accessed. Furthermore, sensors are needed to measure steering wheel angle and gear shift, but these are fairly easy to desig...

The GPS is a constellation of twenty-four satellites (plus spares) that orbit the earth every twelve hours at an altitude of 14,000 miles from the earth's center. The system is owned and operated by the DOD, specifically the Air Force. Each satellite carries four highly accurate atomic clocks that "tick" to an accuracy of 1 nanosecond (one-billionth of a second); future satellites are expected to be accurate to between .01 and .1 nanosecond. The satellites broadcast their precisely timed radio signals through the atmosphere and onto the earth's surface at the speed oflight. The signals from each satellite arrive at any particular point on or above the earth's surface at slightly different times. GPS receivers passively calculate where they are and what time it is by comparing the signals of multiple satellites in the constellation. Receivers require an unobstructed view of the sky, so they can be used only outdoors, and they often do not perform well in forested a...

The DVR is rapidly evolving far beyond its original, and quite limited, role as a time-shifting device. The DVR will become a more multifaceted product, one that can conveniently access and store both broadcast and Internet Web media. Very soon, endusers will gather, sort, and access videos, photos, music, podcasts, and RSS feeds.1 And, with the intelligence available in the next generation of DVRs, connections between various content choices will be recognizable, such that meaningful recommendations as to related content and choices amongst all enduser media will become the enduser’s favorite feature—a trusted friend, of sorts. Best of all, it will all be readily accessible anywhere within the home and, when the enduser is out and about, via the Net. JC900, As a star model for Jimi Electronic, JC600 ( rear view mirror with gps ) has enjoyed a high popularity since its launch. To cater for different niches in a variety of different national markets, Jimi today announces its brother ...

GPS Declassified examines the development of GPS from its secret, Cold War military roots to its emergence as a worldwide consumer industry. Drawing on previously unexplored documents, the military rivalries influenced the creation of GPS and shaped public perceptions about its origin. Since the United States’ first program to launch a satellite in the late 1950s, the nation has pursued dual paths into space—one military and secret, the other scientific and public. Among the many commercial spinoffs this approach has produced, GPS arguably boasts the greatest impact on our daily lives. Told by the son of a navy insider—whose work helped lay the foundations for the system—and a science and technology journalist, the research and technological advances required for the development of GPS. GPS moved from the laboratory to the battlefield to the dashboard and the smartphone, and they raise the specter of how this technology and its surrounding industry affect public policy. Insights into h...

We are currently seeing a golden age of unprecedented progress and discovery in movement research. The innovation in Global Positioning System (GPS) technology, combined with systems for remote data transfer, has particularly favored tracking device -based animal telemetry to become a standard in wildlife tracking. Three main processes are responsible for this rapid advancement: (1) the development of new tracking techniques to quantify movement, (2) powerful data analysis tools to examine key questions about movement and its causes and consequences, and (3) conceptual and theoretical frameworks for integrating movement research. Many new tools have been developed recently to record the movement of various organisms vii with levels of accuracy, frequency, and duration that are much higher than they were just a few years ago. This has strongly improved our capacity to track insects, fish, and other relatively small organisms. However, arguably the most dramatic development in animal bio...

In recent years, new wildlife tracking and asset GPS tracking device have become available, allowing remote data capture from a steadily increasing number of taxa, species and individual animals. This has resulted in a substantial increase in the volume of data gathered by researchers, environmental monitoring programs and public agencies. In the future, one can expect an almost exponential increase in collected data as new sensors, e.g. to monitor health status, interactions among individuals, or other animal-centred variables, are integrated into current biologging systems on animals. Data can be remotely transferred to operators (e.g. using Global System for Mobile Communications (GSM) networks or satellite systems such as Argos, Globalstar and Iridium), making near real-time monitoring of animals possible. Furthermore, positional information can now be complemented with a wide range of other information about the animals’ environment made available by satellite remote sensing, met...

Understanding the right positions and directions of people and objects is a significant issue from the ancient eras to the present. In the past, people often launched a war in order to satisfy the craving for the dominating powers and spread their realms. In the recent, Global Satellite Positioning System (GPS) has become the one of most popular positioning technologies. GPS can provide users precise positioning information, no matter wherever that may present their own positions. The early GPS positioning technology has been widely used in military, marine use, until recently gradually applied into our daily life, e.g. automotive navigation, geodesy surveying, etc. In this chapter, the authors will briefly introduce some GPS issues including the origins of GPS, GPS system architecture, and related GPS applications. The most driving purpose is to traverse to the destination safely, efficiently, and comfortably. Two types of approaches could achieve the goals, including the static and...

GPS will play a large role in the future of cellphones. The U.S. government has mandated that calls placed by cellphones to 911 emergency operators must reveal where the call was made, just like landline telephones. This new program works by either triangulating a mobile phone’s position via cellular phone network antenna towers or with a GPS receiver built into the cellphone that transmits its location. In 2003, the first GPS ID Card enabled cellular phones started to appear on the U.S. market. Internet sites and tracking software are available that can provide you with the location of a GPS-enabled phone that’s subscribed to a location reporting service. As GPS phone start to become more common, it’s only a matter of time before navigation and map programs start to appear on the phones, which will bring a whole new meaning to using your phone to get directions. Trying to decide which GPS unit and accessories to get could be overwhelming, especially with the number of choices...