- Real Time Vehicle Tracking
- Vehicle Immobilizatio
- Engine Off / On
- Door Open / Close
- Panic Alarm
- Geo-Fencing
- Online Vehicle Report
- Cost Effective
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Renders following information about vehicle(s): |
- Speed
- Distance traveled by vehicle between two positions came from the Vehicle in Control Room
- Current Position on MAP
- Latitude/Longitude
- Alarm signals in emergency
- Confirmation of Every Command which is given to vehicle from the Control Room
- Report of Vehicle Can be taken in Data Format and You can play back the route of vehicle.
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| Components of ABASYS Vehicle Tracking system : |
- VTU Vehicle Tracking Unit for Each Vehicle
- GSM- Modem to be connected with CPU through RS-232 (around 1 meter).
- GSM Antenna
- MAP For the State/Country in which you want to track your vehicle
- Mobile Chips GSM Based SIM Card for Vehicle
- Software KIPL Software For Tracking to be installed in PIV Computer
- Module For 1 Vehicle to 500 Vehicles are available
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| GPS : Satellite Navigation System |
| GPS is funded by and controlled by the U. S. Department of Defense (DOD). While there are many thousands of civil users of GPS world-wide, the system was designed for and is operated by the U. S. military. GPS provides specially coded satellite signals that can be processed in a GPS receiver, enabling the receiver to compute position, velocity and time. Four GPS satellite signals are used to compute positions in three dimensions and the time offset in the receiver clock. Space Segment The Space Segment of the system consists of the GPS satellites. These space vehicles (SVs) send radio signals from space. The nominal GPS Operational Constellation consists of 24 satellites that orbit the earth in 12 hours. There are often more than 24 operational satellites as new ones are launched to replace older satellites. The satellite orbits repeat almost the same ground track (as the earth turns beneath them) once each day. The orbit altitude is such that the satellites repeat the same track and configuration over any point approximately each 24 hours (4 minutes earlier each day). There are six orbital planes (with nominally four SVs in each), equally spaced (60 degrees apart), and inclined at about fifty-five degrees with respect to the equatorial plane. This constellation provides the user with between five and eight SVs visible from any point on the earth. |
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| Control Segment |
The Control Segment consists of a system of tracking stations located around the world.
The Master Control facility is located at Schriever Air Force Base (formerly Falcon AFB) in Colorado . These monitor stations measure signals from the SVs which are incorporated into orbital models for each satellites. The models compute precise orbital data (ephemeris) and SV clock corrections for each satellite. The Master Control station uploads ephemeris and clock data to the SVs. The SVs then send subsets of the orbital ephemeris data to GPS receivers over radio signals. |
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| User Segment |
- The GPS User Segment consists of the GPS receivers and the user community. GPS receivers convert SV signals into position, velocity, and time estimates. Four satellites are required to compute the four dimensions of X, Y, Z (position) and Time. GPS receivers are used for navigation, positioning, time dissemination, and other research.
- Navigation in three dimensions is the primary function of GPS. Navigation receivers are made for aircraft, ships, ground vehicles, and for hand carrying by individuals.
- Precise positioning is possible using GPS receivers at reference locations providing corrections and relative positioning data for remote receivers. Surveying, geodetic control, and plate tectonic studies are examples.
- Time and frequency dissemination, based on the precise clocks on board the SVs and controlled by the monitor stations, is another use for GPS. Astronomical observatories, telecommunications facilities, and laboratory standards can be set to precise time signals or controlled to accurate frequencies by special purpose GPS receivers.
- Research projects have used GPS signals to measure atmospheric parameters.
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| Precise Positioning Service (PPS) |
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| SPS Predictable Accuracy |
- 100 meter horizontal accuracy
- 156 meter vertical accuracy
- 340 nanoseconds time accuracy
- These GPS accuracy figures are from the 1999 Federal Radionavigation Plan. The figures are 95% accuracies, and express the value of two standard deviations of radial error from the actual antenna position to an ensemble of position estimates made under specified satellite elevation angle (five degrees) and PDOP (less than six) conditions.
- For horizontal accuracy figures 95% is the equivalent of 2drms (two-distance root-mean-squared), or twice the radial error standard deviation. For vertical and time errors 95% is the value of two-standard deviations of vertical error or time error.
- Receiver manufacturers may use other accuracy measures. Root-mean-square (RMS) error is the value of one standard deviation (68%) of the error in one, two or three dimensions. Circular Error Probable (CEP) is the value of the radius of a circle, centered at the actual position that contains 50% of the position estimates. Spherical Error Probable (SEP) is the spherical equivalent of CEP, that is the radius of a sphere, centered at the actual position, that contains 50% of the three dimension position estimates. As opposed to 2drms, drms, or RMS figures, CEP and SEP are not affected by large blunder errors making them an overly optimistic accuracy measure
- Some receiver specification sheets list horizontal accuracy in RMS or CEP and without Selective Availability, making those receivers appear more accurate than those specified by more responsible vendors using more conservative error measures.
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| GPS Error Sources |
- GPS errors are a combination of noise, bias, blunders.
- Noise errors are the combined effect of PRN code noise (around 1 meter) and noise within the receiver noise (around 1 meter).
- Bias errors result from Selective Availability and other factors
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