The vehicle tracking systems are the update way of zeroing in on your moving vehicles sitting in front of the computer. The vehicle tracking systems are used in heavy numbers by the transportation companies. The vehicle tracking systems contain a device named GPS tracking system. The term GPS stands for the "Global Positioning System". In recent times it is more used for mobile phone tracking as well as even the wildlife tracking. Vehicle tracking systems are used to track down any vehicle you wish to, like cars, trucks etc. Many online service providers are providing these tracking systems, not exclusively the device but also their services.
Let's discover it a bit more
As told above, the vehicle tracking systems are used for tracking down the fleets. They contain GPS trackers. This GPS tracker has a set which is put into the vehicle. You could put it under the knowledge of the driver or without his knowledge, but in both ways you can nail the person through it. The GPS generally has the device that emits radio signals. The satellite captures those emitted radio signals. These signals are in return used to transport them back to the computers installed on earth. And it is through these computers that you can watch your fleets. The computers need no special software to run the images of the vehicles. They just need active internet connection.
The images available are up to the last detail. And you can even maintain a record of this event for future use. Through the vehicle tracking system you can scan mileage, stoppage, time of halt, path taken and speed too. All these details will tell you the exact quantity of fuel required for a trip. The vehicle tracking systems help navigate the unknown roads as well, resulting in cut down in delivery timings. With vehicle tracking systems you will score high profits with one time investment only.
Online buying of vehicle tracking systems
You can purchase online vehicle tracking systems. The online service providers also provide services of monitoring your fleets 24 hours a day for 365 days a year- at your request. Also, if you want to buy your vehicle tracking systems online you can save lot of money.
Vehicle Tracking Systems: Monitor Your Fleets the Easiest Way Possible...
Best Hunting GPS - the Top 7 Reasons Why the Garmin Etrex Vista Hcx is the Best Hunting GPS...
Many people are asking which GPS is the best for hunting. The Garmin eTrex Vista Hcx is among the best GPS units for hunting for many reasons but here are the top seven.
1. Long Battery Life - It is essential to have a GPS unit that has a long battery life to it when hunting in the outdoors. The Vista Hcx will run approximately 25 hours on 2 AA batteries. Remember to almost always carry extra batteries in your pack while hunting so you do not get stuck in the middle of nowhere with out having replacements.
2. Compact & Lightweight - When you are doing spot and stalk hunting you will appreciate having a GPS that is both compact and lightweight. The Vista Hcx is small enough to fit in your shirt pocket and only weighs 5.5 ounces.
3. Waas-enabled & Electric Compass - It is extremely important to have a GPS that is Waas-enabled when hunting like the eTrex Vista Hcx is because it will locate your position fast and precisely even when you are hunting in heavy cover or a deep canyon. The Garmin eTrex Vista Hcx is equipped with an electric compass which will provide your bearing information even while you are sitting still in a tree stand or hunting blind.
4. Hunt/Fish Calculator & Sun/Moon Information - The Vista HCX has a Hunt/Fish calculator which tells you the best times to hunt each day. It also provides you with sunrise and sunset times so you can plan your time hunting in the field better.
5. 256 Level Color - You will enjoy the 256 level color of the Vista HCX with it's easy to read screen and great contrast that it brings to your topo maps while outdoors.
6. Great Memory and MicroSD slot - You can record 1000 waypoints, 50 routes, and 20 tracks with the Garmin eTrex Vista HCX. It has a microSD slot where you can insert preloaded microSD cards with MapSource information about the area you are hunting.
7. Water Proof - But the most important reason why the Garmin eTrex is among the best hunting GPS unit is because it is water proof. You don't want to worry about damaging your GPS unit when you are out hunting and a rain shower or snow flurries start to fall.
These are just a couple of of the reasons why the Garmin eTrex Vista Hcx is the best GPS unit for hunting.
HONDA FIT special Car DVD Player Video Audio built in vehicle GPS navigation systems,TV,RDS,steering wheel...
Product Description
Model No.: CAV-8070FT
1) 7inch TFT high clearan screen
2) Display menu operation systerm through touch function
3) CompatiblewithDVD/VCD/CD/WMA/MP3/MP4(AVI)/CD-R/CD-RW/DVD-R/DVD-RW
4) Power electronic & mechanical double anti-shock system?
5) USB/SD card insert port: obtainable with USB/SD card insert port help U disk, SD card, MMC card, with MP4 format( AVI format), MP3, WMA audio play and image browse functions;
6) TV receiving: high sensitive TV tuner, full frequency & band receiving, pre-store 80 TV channels;
7) Radio receiving: high sensitive AM/FM receiving mode, pre-setting 30 stations and programs;
8) Car reverse reminder: with car reverse video signal input, connect with sorts of reverse mirror, view the car reverse status
9) Bluetooth function: support Bluetooth wireless handsfree function,caller id display,direct dialing and clearance of voice talking circuit ;
10) Built-in GPS navigation function?optional?
11) GPS navigation functions: druing the navigation status, manual input on the touch screen to make operation more easier, instant;
12) With back control function, could outside connect display and speaker could play other video frequency and audio frequency
13) With steering whell control function, drivery have more risk less (optional)
14) Using key-press,remote control and touch-screen operation, producing operation more flexibly.
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SUAV INDUSTRIAL CO., LIMITED mainly produce the following products:
1, update design multifunctional car DVD player TV GPS
( headrest/sun visor DVD player with game, double din DVD, in-dash DVD, car TV, etc. )
2, unique video glasses private cinema
3, various latest design MP3 MP4 MP5 player
4, portable mini DVD player
Revolution in GPS: Advanced Spinning-Vehicle Navigation...
Revolution in GPS: Advanced Spinning-Vehicle Navigation
GPS-aided weapons such as the Joint Direct Attack Munition (JDAM) family of bombs have revolutionized warfare, dramatically improving accuracy and cost effectiveness, while significantly reducing collateral damage. Augmenting artillery rounds with GPS aiding could furnish similar improvements. Unfortunately, the rapid rotation on launch of many shells and rockets complicates GPS-aided guidance. This rotation could cause amplitude and phase modulation of the GPS signal, reducing navigation performance and capability of traditional anti-jam systems. Further complicating matters, traditional attitude determination techniques, utilizing inertial sensors, tend to develop significant errors at high roll rates.
To address the special navigational needs of rotating vehicles, my colleagues and I have developed a suite of GPS technologies well-known as Advanced Spinning-Vehicle Navigation (ASVN). These technologies enable high-performance, interference-robust GPS navigation as well as roll-angle determination on both rapidly spinning and slowly rotating vehicles. Potential applications include artillery shells, rockets, missiles, space vehicles, and unmanned aerial vehicles (UAVs).
Bottom-Line Drivers. ASVN provides an innovative, low-cost, compact, and robust solution to both rotation angle determination and the navigation of rapidly rotating vehicles. ASVN can:
* Improve jamming immunity by using interference to aid navigation and guidance;
* Increase range by delaying deployment or reducing the required authority of control fins and actuators;
* Reduce cost, size, and weight by eliminating or decreasing the requirements of the inertial sensing system and simplifying antenna design; and
* Enhance accuracy by enabling early GPS acquisition for improved estimation of vehicle trajectory and inertial measurement unit errors.
ASVN Technology Suite
ASVN uses the amplitude and phase modulation of the signals received by a GPS antenna on a spinning vehicle to track both vehicle rotation and improve GPS jamming and interference immunity. Analyses and laboratory and field hardware simulations illustrate the viability of ASVN technologies to reduce costs and improve the performance and capabilities of a range of spinning and rotating applications. Four core solutions comprise ASVN technology:
GPS Roll Angle Determination. Using the GPS signal modulation with rotation to measure vehicle roll angle;
Interference-Aided Navigation. Leveraging a jamming signal or interference document to aid vehicle navigation;
Temporal Beam Forming. Improving jamming resistance with only a single rotating antenna element; and
Coriolis Pitch- and Yaw-Rate Sensing. Providing inertial aiding (including rotation rates) without the use of gyroscopes.
GPS Roll-Angle Determination
In rapidly rotating vehicles (such as artillery shells and missiles), high roll rates complicate attitude determination using conventional inertial sensing techniques. Gyroscope scale factor inaccuracies trigger small roll angle errors with every rotation. At high spin rates, these errors rapidly accumulate into large errors in the vehicle attitude estimate. Added sensors such as magnetic detectors can provide an absolute roll reference, but the performance of these systems depends on the geometry of the flight trajectory with respect to the Earth's magnetic field and the magnetic properties of the vehicle.
ASVN GPS roll-angle determination (GRAD) uses the GPS signal as a reference for roll determination. The diverse geometry of the GPS constellation provides a very trajectory-independent roll reference. Because a GPS receiver typically is present in guided munitions for position determination, no additional sensors are required. The GPS signal is very weak and buried in the background noise, rendering traditional radio frequency (RF) direction-finding techniques ineffective for GRAD. However, rotation demodulators controlled by a roll-angle estimate and GPS correlators help observe the signal.
Figure 1 shows a block diagram of the GRAD receiver with rotation demodulators preceding the GPS correlators. Figure 2 shows the amplitude and phase modulation measured for an example antenna, as well as the rotation demodulator amplitude and its phase correction centered on the rotation modulation. When the estimated roll angle aligns with the actual vehicle roll angle, as shown in the figure, the rotation demodulator corrects the phase modulation and passes the largest portion of the GPS signal amplitude on to the carrier demodulator.
Two more signal-processing channels provide feedback for rotation tracking. The roll-angle control for one channel is advanced ahead of the centered roll-angle estimate and the different is retarded behind it.
When the roll estimate is properly aligned with the true roll angle of the vehicle, the correlation magnitude from the centered channel'll be maximized, and the advanced and retarded channels will be reduced in amplitude and approximately equal. The rotation-angle-tracking servo loop can accurately maintain alignment of the centered channel with the actual roll angle of the vehicle by controlling the angle estimate to keep the advanced and retarded magnitudes equal.