JIMI Electronic

Several different techniques have been developed for using the  GPS tracker  to pinpoint a user’s position, and to refine that positioning information though a combination of GPS derived data and additional signals from a variety of sources. Some of the more popular techniques, such as autonomous positioning, differential positioning and server-assisted positioning, are briefly described below. Autonomous GPS positioning Autonomous positioning, also known as single-point positioning, is the most popular positioning technique used today. It is the technique that is commonly thought of when a reference to using the GPS to determine the location of a person, object or address is made. In basic terms, autonomous positioning is the practice of using a single GPS receiver to acquire and track all visible GPS satellites, and calculate a PVT solution. Depending upon the capabilities of the system being used and the number of satellites in view, a user’s latitude, longitude, a...

The navigation message The navigation message broadcast by every GPS satellite contains a variety of information used by each tracking platform to calculate a PVT solution. The information in this message includes time of signal transmission, clock correction and ephemeris data for the specific SV, and an extensive amount of almanac and additional status and health information on all of the satellites in the GPS. Each SV repeatedly broadcasts a navigation message that is 12.5 minutes in length,and consists of 25 1500-bit data frames transmitted at 50 bits per second. A single data frame is composed of five 300-bit subframes, each containing different status or data information for the receiver, preceded by two 30-bit words with SV-specific telemetry and handover information. The first three subframes, containing clock correction and ephemeris data relevant to the specific SV, are refreshed as necessary for each data frame transmitted during the navigation message broadcast. The al...

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...

Need directions? Are you good at getting lost? Then GPS is just the technology you’ve dreamed of. If you have a personal tracking device or plan to buy one, this blog helps you compare GPS technologies,units, and uses. You’ll find out how to create and use digital maps and learn about waypoints, tracks, coordinate systems,and other key point to using GPS technology. Get more from your GPS device by learning to use GPS tracking platform and even how to turn your cell phone or PDA into a GPS receiver. You’ll also discover: Up-to-date information on the capabilities of popular handheld and automotive Global Positioning Systems How to read a map and how to get more from the free maps available online The capabilities and limitations of GPS technology, and how satellites and radio systems make GPS work How to interface your waterproof tracking devices with your computer and what digital mapping software can offer Why a cell phone with GPS capability isn’t the same as a GPS unit What can...

If you realized that your enterprises must manage assets beyond the company fleet, and ypu are lucky to read this article from Jimilab. Jimilab offers a suite of other tracking tools and capabilities. Each delivers powerful benefits in its own right, but they become even more beneficial when integrated with asset tracker system as part of a true enterprise platform. Trailer Tracking This function needs these elements: a GPS receiver, satellite transmitter, internal long-life battery, and antennas are packaged in a rugged enclosure. Together, these components empower you to monitor real-time trailer location, so you can maintain real-time control. Some enterprises even offer a temperature-monitoring capability for refrigerated trailers. Our patent-pending products rely on data compression algorithms, which allow for single-packet transmission of location, speed, direction of travel, and other data. Using a standard web browser, such as Google, you can view current and histori...