Friday, July 22, 2011

Guide in Choosing Car GPS Systems


The global positioning system (GPS) is a piece of equipment that uses satellite technology to provide data for maps and positioning at any time of the day. Quite a number of new automobiles come with GPS systems. Other GPS systems can be bought online or over-the-counter and installed or used as a portable device. Technological advancements help GPS systems to be developed updated continuously. The devices are getting smaller in size as they also become more powerful and more accurate. A GPS works as a mobile map that helps one know their exact location and guides one in the best routes and nearby establishments.

Choosing to have a GPS vehicle tracking system installed in one's car will save one from the hassle of being lost and asking for directions. To be guided in selecting the right GPS vehicle tracking system, here are some tips to keep in mind.

Frequency of Use

In looking for the best automotive GPS systems, one should have figured out or estimated how often one is going to need it and use it. If one is not going to need it very often, it is recommended to consider the inexpensive automotive GPS systems available. On the other hand, if one expects to use it very often, it would be better to find automotive GPS units that are user friendly.

Kind of Tracking Systems

There are four major types of GPS automobile tracking systems that one can choose from, the car navigation GPS system, the portable outdoors GPS unit, the marine GPS unit, and the PDA/GPS hybrid. Overall, one could find the in-car GPS navigation system the most useful when you want to know your exact location when you're driving without a map.

Car Positioning

In choosing automotive GPS systems, one should consider the car's layout. Most GPS units have monitors that display directions and maps on them. Usually, these monitors are placed on the dashboard or on an attachable pedestal from the dash. Some vehicles do not have the space and capacity to hold GPS units and that can block important vents for air or make it uncomfortable for a person in the passenger seat.

Multi-Functions

Every client or buyer's first priority in purchasing an item is its functionality. In choosing an automotive GPS system, it would be better to have a GPS that has multiple functionalities. Quite a number of automotive GPS systems provide directions by an address back, an address typed in, a location selected on a map, or even by the nearest intersection.

Real-Time Tracking Updates

Another feature that should be considered in looking for a GPS automobile tracking system is its ability to provide a "real-time" wireless network that can help process information through visual representation. This is very helpful in verifying if one is going the right way and making the correct turns.

Audio Instructions

One should also consider looking for a GPS automobile tracking system that is capable of giving audio instructions while driving. Several models only provide visual location maps which might not be useful when one is driving alone.

Price

When one has decided on the kind of GPS system and the features it has, one's budget should also be considered. The differences in pricing usually depend on the number of features the system provides, however there are less expensive models that have enough features for most users. Prices for GPS units range from under $100 for the Garmin Nuvi 200 through Home Depot to nearly $400 for the Magellan Maestro 5310.




My name is Syed Irfan and if you like the article above and would like to know more, please visit my website http://bit.ly/GPSReviews.





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Thursday, July 21, 2011

GPS Accessories - Where to Find Affordable Motorcycle GPS Mounts


If you plan to do any traveling on your motorcycle, you will undoubtedly want to purchase a GPS unit. GPS (Global Positioning System) is a navigation technology that provides precise time and location data by using 24 NAVSTAR satellites. GPS units have become an important electronic device for just about anyone on the road today. Even motorcycle riders have started to see the benefits of having a GPS unit attached to their bike. Whether you are cruising around the city or taking a drive across your state, a GPS motorcycle mount is a handy accessory.

You will need to find a GPS mount that works with your bike if you want to attach your GPS to your motorcycle. There are many places where you can find these types of mounts. Depending on the type of GPS you own, try visiting the website of the manufacturer of your GPS. Both TomTom and Garmin are GPS manufacturers that have websites where you can easily find a GPS motorcycle mount that will work.

If you are like the majority of people, you will want a good deal on a GPS motorcycle mount. There is no better place to find affordable motorcycle mounts than eBay. Many people think that eBay is a place where people sell only used goods, but this is simply not the case. You can find both new and used motorcycle GPS mounts on eBay that will work with your specific GPS model. Because eBay offers sellers a cheap place to sell their goods, you can always find affordable GPS mounts. For buyers, you are protected by eBay's buyer protection program, which helps buyers and sellers resolve transaction problems. With this added protection, you should feel comfortable with purchasing items on eBay.

Now that you know where to find the perfect GPS motorcycle mount for your bike, it is time to hit the road and explore the world.




Alex McGaw writes about saving money shopping online. For more tips on buying cheap GPS accessories or Motorcycle GPS Mounts, please visit TomTom GPS Deals The TomTomGPSdeals.com website offers you the lowest prices on GPS units, GPS cases, GPS chargers and other accessories. Because of their large selection, TomTom GPS Deals can always offer you the best deals. This site is a great place to start your search for motorcycle GPS mounts.





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Preventing GPS Disasters


If your GPS device told you do drive off a cliff or ford a raging river, would you do it? You may respond, of course not, that's stupid. Unfortunately, many people substitute technology for common sense, often with tragic results.

Satellite navigation systems are changing the way in which we navigate from place to place by land, sea or air; in remote wilderness areas or through congested urban streets. The GPS system has been called the greatest advance in outdoor navigation since the invention of the compass and has become a widely used aid to navigation worldwide, a useful tool for map-making, land surveying and recreational navigation. An estimated 50 million navigation devices, including in-car systems, handheld or portable units and smart phones, will be in use in the United States this year.

Whether you're prospecting, hunting, fishing, cross-country skiing, or taking a hike in the back country, a GPS receiver can help you reach your destination and return safely - but only if you know how to accurately use it and recognize its limitations.

The Global Positioning System (GPS) is a satellite-based navigation system made up of a complex network of more than 30 satellites placed into orbit by the U.S. Department of Defense. The GPS network, also called NAVSTAR, was originally intended for military applications, however when Korean Air Lines Flight 007 was shot down in 1983 after straying into the USSR's prohibited airspace, President Ronald Reagan issued a directive making GPS freely available for civilian use as a common good. The GPS works all the time, in any weather condition, anywhere in the world, 24 hours a day.

Powered by solar energy, the numerous satellites that make up the GPS space segment orbit at approximately 12,000 miles above the earth. Moving constantly at speeds in excess of 7,000 mph, the satellites each make two complete orbits of the earth in less than twenty-four hours. The GPS satellites are kept on track by small rocket boosters. Primarily operated on solar power, the satellites also employ backup batteries in anticipation of power loss during a solar eclipse.

The first GPS satellite was sent into orbit in 1978, with a full constellation of satellites achieved in 1994. Weighing approximately 2,000 pounds, each satellite is about 17 feet across with the solar panels extended and is built to last about ten years. Replacement satellites are constantly being built and then launched into orbit.

GPS signals can be affected by multi-path issues, where the radio signals reflect off surrounding terrain such as tall buildings, mountains or large obstructions. This increases the travel time of the signal and can cause inaccuracy. The number of satellites visible, or the more satellites a GPS receiver can "see" will also affect accuracy. Electronic interference, buildings, terrain or sometimes even dense foliage can block the signal reception and cause positioning errors or prevent a position reading at all.

Anomalies like high static discharge during lightning storms, humidity, ionized air and barometric pressure can definitely cause false information, data error or miscalculations. A satellite signal slows as it passes through the atmosphere. Ionosphere and troposphere delays may cause distortion. GPS units normally will not work indoors, underground or underwater.

In automotive GPS receivers, metallic features in windshields, such as window tinting films or defrosters elements can degrade reception inside the vehicle. Receiver clock errors are also common. This type of error occurs because a receiver's built in clock is not as accurate as the atomic clocks onboard the GPS satellites and will reflect varying timing errors. These distortions can result in positioning errors of hundreds of miles.

Unreliable data is also a major contributor to GPS errors. With an incalculable number of roads and millions of miles of ground to cover, it is impossible for any data system to be 100% accurate. A road network is a constantly changing entity; roads are diverted or closed, construction reroutes traffic while weather affects road conditions. The data feed used in GPS units is dated. Fresh updated content may not be available for several months. It is important to remember that this data is updated quarterly at best and in some cases only released twice a year.

Although GPS Navigation is becoming increasingly popular, these units have the ability to highlight human error. A GPS devise will attempt to advise you depending on the destination your have entered. An incorrect address or a mistake in spelling are common errors. Instead of making our lives easier, some of these devices are so technologically enhanced they are very difficult to use. User mistakes account for the majority of GPS errors, however a GPS receiver has no way to identify and correct these mistakes.

GPS technology isn't perfect! It's imperative to pair its directions with a healthy dose of common sense. Many drivers exhibit a surprising willingness to rely on gadgets instead of experience. They are finding that satellite navigation may replace paper maps, however following the GPS's not always reliable directions, many users are getting hopelessly lost, hitting dead ends or road closures and even swerving into oncoming traffic.

Even if you are not blindly following erroneous, computer-generated instructions, research studies tell us that "using GPS while behind the wheel is actually more distracting and less safe than unfolding a paper map and using it to find your way". A large portion of drivers, according to the study, relied exclusively on their GPS unit for directions, "rendering them completely oblivious to the world around them."




Nandu Green is a lifestyle portal, offering high-quality, unique, intriguing and innovative merchandise from around the globe.

Marlene Affeld's passion for the environment and all things natural inspire her to write informative and insightful articles to assist others in living a Green Lifestyle. For more Green Living info visit Nandu Green at http://nandugreen.com





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WAAS - Enabled GPS System


WAAS (Wide Area Augmentation System) was developed by the Federal Aviation Administration to augment the Global Positioning System to improve its accuracy, integrity, and availability. WAAS was originally intended to enable aircraft to rely on GPS for all phases of flight, including the precision approach to airport's within its coverage area. The WAAS system typically provides better than 1.0 meters laterally and 1.5 meters vertically throughout most of the contiguous United States and large parts of Canada and Alaska. This accuracy is capable of provideing aircraft with the precision needed for safe approaches and inflight navigation for all weather conditions. Integrity of the WAAS information is no more than 3 seconds of bad data per year allowing the system to be considerd safe by the FAA for instrument flight rules.

Although orignally developed for aviation, WAAS is not just limited to the aviation industry, any GPS receiver that is capable of receiving the WAAS signal will be able to benefit from it's correction data, making the GPS positioning more accurate. In fact a WAAS-enabled GPS receiver can even give you directions right down to the lane your car is traveling in (as long as the maping program supports "lane assist" directions). Because the Wide Area Augmentation System is quickly becoming standard in the GPS industry, most new GPS receivers today are WAAS-enabled. Just like with the conventinal GPS, the WAAS system doesn't come with any extra cost or fees to use. All that is required is that the GPS receiver be WAAS-enabled so it can receive and decode the data then be able to apply corrections to it's position. Currently the WAAS service is limited to the U.S.A., Canada, Alaska and Hawaii. Although independant from WAAS, Europe and Asia are working on their own supplemental GPS correction systems. Europe has the  "Euro Geostationary Navigation Overlay Service" (EGNOS) and Japan is working on their "Multi-Functional Satellite Augmentation System" (MSAS) .

How The WAAS System Works

WAAS uses a network of approximately 25 ground based Wide-area Reference Stations (WRS) in North America and Hawaii, to measure small variations in GPS satellite signals in the western hemisphere. These precisely surveyed ground stations monitor and collect information on the GPS signals and send their data to the three Wide-area Master Stations (WMS). The WMS's generate two different sets of corrections: fast and slow. The fast corrections are for errors that are changing rapidly and are a primary concern to the GPS satellites instantaneous positions and clock errors. These corrections are user position independent, which means they can be applied instantly by any receiver in the WAAS broadcasting area. The slow corrections are for long-term ephemeric and clock error estimates and ionospheric delay information.

Once these corrections are generated, the Master Stations sends them to two pairs of Ground Uplink Stations (GUS) that transmit the correction messages to a series of geostationary satellites that broadcast their correction data back to earth. Then WAAS-enabled GPS receivers use this information to make corrections to the original GPS signial, giving WAAS-enabled GPS receiver a more accurate position. GPS receiver's use the information broadcast from each GPS satellite to determine their location and the current time. Depending on the GPS device, a GPS receiver only needs to receive a signal from 3-4 satellites (out of the 31 satellites currently transmiting a signal for civilan users) to be able to calculate it's position. In addition to the GPS signal, a WAAS-enabled GPS receiver can also receive the geostationary WAAS satellite signal.

The two different types of correction messages from the WAAS system (fast and slow) are used by  the GPS receiver in different ways. The fast type of correction data includes the corrected satellite position and clock data to determine its current location using normal GPS calculations. Once an approximate position fix is obtained the GPS receiver begins to use the slow corrections to improve its accuracy. Slow correction data Includes the ionospheric delay. When the GPS signal travels from the satellite to the receiver, it passes through the ionosphere. The receiver calculates the location where the signal pierced the ionosphere and, if it has received an ionospheric delay value for that location, it corrects for the error  that the ionosphere created. Unlike the fast data, the slow data doesn't need to be updated frequently because the ionosphere conditions don't change rapidly. While the slow data can be updated every minute if necessary, they are only updated every two minutes and are considered valid for up to six minutes.

Limitations of the WAAS System

(1) The WAAS system is currently only available to United States and large parts of Canada and Alaska but there plans to expand the system to other countries and continents.

(2) Because the WAAS broadcasting satellites are geostationary  causes them to be less than 10° above the horizon for locations north of 71.4° latitude. This means aircraft in areas of Alaska or northern Canada may have difficulty maintaining a lock on the WAAS signal.

(3) In order to calculate an ionospheric grid point's delay, that point must be located between a satellite and a reference station. The low number of satellites and ground stations limit the number of points which can be calculated.

(4) Aircraft conducting WAAS approaches must possess certified GPS receivers.




Jeff Sanders

Garmin GPS Navigation Systems [http://www.gpsfrontier.com]

[http://www.gpsfrontier.com]





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How Does GPS Work: A Look at GPS and Outdoor Activities


The Global Positioning System (GPS) is a network of 24 satellites orbiting earth at 7,000 miles an hour. The satellites were launched and are maintained by United States Department of Defense for the benefit of military applications. The Satellites orbit the earth twice a day at about 12,000 miles above the planet. Considering there are no obstructions, no matter where you are on the planet earth there are at least 4 GPS satellite signals visible to GPS receivers at all times making it accurate and a huge benefit for people who enjoy the outdoors.

How Does GPS Work

The idea of GPS originated in the 1960's, but the first satellite was not put into orbit until 1978. The 24th satellite was launched in 1994 completing the mission and enabling the military to calculate positioning around the world extremely accurately. The Satellites are designed to last about 10 years, so there is constant upkeep and launching of new satellites regularly.

GPS for Civilians

GPS was not made available to the rest of the world until the 1980's. After that point, anybody was allowed to use the data available through a GPS receiver to accurately pinpoint their location, elevation, and distance traveled, among other things. Obviously though, technology was not there to make much use of civilian GPS and the benefits associated with it. GPS receivers at the time were expensive, big and clunky, and required substantial amounts of power to run them; at least more than a few batteries could provide.

It was not until the 1990's that technology caught up and the average outdoor enthusiast began to realize the benefits of GPS and how it could aide in their outdoor adventures such as hunting, hiking, and driving. Since then, GPS receivers have grown tremendously in popularity and are now available in compact sizes and can be run off small amounts of power offering hikers and hunters extremely accurate information on their whereabouts and travel information.

How Does GPS Work?

The Global Positioning System transmits signals from the satellites down to earth. A GPS receiver then picks up that transmission and analyzes the data that was sent. Mostly, the GPS receiver gathers the exact position of the satellite and determines the time it took for the signal to reach the receiver. The signal travels at the speed of light (186,282 miles per second) so we are talking about a very short amount of time. With the distance measurements of several different satellite signals, the GPS receiver then uses the mathematical concept of triangulation to compute the exact location of the user.

To accurately determine 2D information (longitude and latitude) a GPS receiver needs to be receiving signals from at least 3 satellites. To determine 3D information, the receiver needs to be picking up signals from 4 or more satellites which will enable it to determine more information such as exact location, elevation, altitude, distance traveled, sunrise and sunset, as well as many other useful concepts to hunters and other outdoor enthusiasts.

Accuracy:

GPS receivers are quite accurate, especially if you have an unobstructed view of the sky in all directions. There are factors that can throw off a GPS, but for the average outdoorsman, even with these factors, the accuracy is more than close enough with the average accuracy of 15 meters handheld models built for the average outdoorsman.

There are, however, units that can determine location with much greater accuracy than the standard outdoorsman model GPS. These are used by surveyors and other emergency equipment. Surveyors can actually determine elevations and distances to hundredths of an inch or better. How do these GPS work so accurately? They use land towers to correct any time issues and other things that can throw them off.

The Benefits of GPS in the Outdoors:

GPS can tell a hunter or hiker exactly where they are as long as they can get satellite signal reception. This is an obvious benefit for the outdoorsman as it will assure that a person will always have a good idea of where they are and how they can get where they are going.

After ending up in locations that were not my intentions while hiking and hunting the backcountry of Western North America, I finally broke down and bought a Garmin Rhino with a built in 2 way radio. I could not talk myself into buying a less expensive model that offered only GPS, as I and the people I spend time with in the outdoors rely on communication as well. It was one of the best investments I have ever made and still have it today working perfectly.

A hunter or hiker can mark a waypoint at the beginning of the journey. They can then mark places along the way that they might want to come back to in the future. Then for their return trip back to the starting point they can let the GPS tell them the exact direction and distance to the starting point. A hiker does not even need to pay attention to where they are heading and can still find their way back with great confidence. I do suggest however that you are always aware of where you are going and make sure you can get back, as you never know when your equipment is going to fail you. This would most likely be due to the unit breaking or running out of power. Rarely will it be due to the GPS receiver leading you in the wrong direction. If you are unsure, always trust what the GPS has to say as it will most times be much more accurate than a human being.




Getting the Right GPS for Your Situation:

Now that we have answered the question of how does a GPS work, you can make an educated decision about what the best GPS for the outdoors is as well as which one is best for you specific situation. At the webpage in the next link you will find a list of what are determined by outdoorsman, hunters and hikers alike to be the best GPS broke down by price range so you can find the GPS receiver that fits your budget. You can see them by clicking here: http://www.bestforhunting.com/?page_id=180





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Handheld GPS Devices - Analyze Your Needs Before You Purchase!


Handheld GPS devices represent a special category of all available GPS (Global Positioning System) receiver units used in various situations and for different applications. The major applicability or usefulness of handheld, portable GPS devices can be divided into two distinctive categories, i.e. for outdoor leisure and sport activities like hiking, trekking, climbing, camping and running and, secondly, for industrial applications like land surveying and position measurements at construction sites. Utilizing the GPS navigation satellite system, correct location of the GPS receiver can be determined by retrieving exact longitude, latitude and altitude coordinates. Today, most GPS receiver units, whether handheld or not, communicate through radio signals with at least four GPS satellites, whereby three satellites determine the exact location of the receiver and the fourth satellite is used for correcting the receiverâEUR(TM)s clock. After the Selective Availability regulation, which provided certain accuracy reservation for military use, was ended in 2000, the precision of civilian GPS improved from about 100m to about 20m.

Handheld GPS devices provide tremendous flexibility and convenience for the user. Not only can the user continuously monitor his, or her, exact and current geographical location and path of travel, but handheld GPS devices can be fitted for relaying with central offices or base stations that can track or follow the user for security and safety reasons. For example, GPS devices that can communicate with and supply coordinates to a central station are very popular by mountain climbers and hikers. As the GPS system has developed and improved over the past years, many new applications have emerged for the users of handheld GPS devices. Not only can users determine their current location, but also obtain a multitude of additional and supportive information through geographical maps, inserted in the GPS receiver units, such as precise navigation, locations of restaurants and hotels, weather reports, tourist attractions, etc. Currently, there are a number of companies producing and offering many different handheld GPS devices. Some of the best known include, Garmin, Magellan and DeLorme. The devices have a broad range of features, attributes and, of course, price tags. Before selecting a particular handheld device, it is important to know what you will be using it for. For example, a GPS device used for hiking may be less applicable for mountain climbing or, even less, running. Obviously, devices for industrial applications have particular requirements and qualities. If you are looking for a handheld GPS device that can be used in different circumstances, a multipurpose unit could be the answer. Furthermore, you need to have an idea of what features you are interested in or require in addition to the standard GPS and mapping functionality, e.g.:


Touch screen window
Color screen or black and white
Built-in camera (like in mobile phones)
SD (memory) card expandability
Voice recorder
Built-in electronic compass
Barometer
MP3 Music Player
External antenna connector
Etc. etc.

Obviously, as the feature list increases, so does the price. Another important thing to keep in mind is considering what geographical maps may be included or applicable to your needs, e.g. outdoor and recreational maps, street maps or marine maps. Most handheld GPS devices come with some pre-loaded or built-in geographical maps, for example a base map of the USA and Canada containing major highways, city centers, bodies of water and more. You need to find out whether you need additional detailed maps that can be added to the handheld device, for example detailed cartographic maps, topographic maps, and more.

Still another important issue to keep in mind is the GPS software that is normally included with the purchase of a new handheld GPS for uploading GPS data to a computer. By that you can conveniently view all your maps, waypoints, trails and routes from your computer screen. Many other interesting advanced features and possibilities can be implemented with an appropriate handheld GPS receiver including, playing "hide-and-seek" and "treasure-hunting" through geocaching or importing your tracks, waypoints and routes into Google Earth for tracking and monitoring. In short, handheld GPS devices offer a plethora of wonderful possibilities and options.

For maximizing its benefits, you should carefully consider your needs and requirements before you actually purchase a new handheld GPS. Common retail prices for handheld GPS devices range from $100 up to $800USD depending on built-in or available features and attributes.




Olafur Ingthorsson is a Consultant and an Internet Marketer. His passions include IT and Communications technologies, including handheld GPS devices, the outdoors and triathlon sports.

Handheld GPS Devices

Analyse Your Needs Before Purchasing a Handheld GPS Device





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Tips While Selecting a GPS


GPS (Global Positioning Systems) devices have become extremely useful in today's fast paced life and are used for various applications whether you are driving your car or on a boat. It doesn't just guide you to the location and indicate the exact position where you are but can also help you find restaurants, gas stations, pharmacies, roadside assistance and even play games. Not just this, but GPS will help you if there are any traffic jams or listen to the satellite radio.

When you go to buy an auto GPS device do look for the number of points of interests it has to offer. A certain number is considered good and below that will be frustrating for you. Now a days more advanced GPS systems are available which include more features and good functionality. Basically the GPS systems perform same things.

This system shows the location on electronic map and will plot route for you wherever you want to go. The GPS navigation systems should also be checked for their screen size ranging from 2.1 inches to 7 inches. Now GPS that comes with good functionality will allow you to switch maps or find the points of interest from its large database with the click of a button. The advanced GPS has MP3 player, Bluetooth capability and satellite radio.

GPS systems are available for different types of users; hikers, marine and aviation techies or simply drivers. Or if it is to be fitness based or site navigation for geocatchers. GPS system will also provide its user with the calculation of the shortest possible route or the best route along with the touch screen and the regional maps in it.

You will have to keep in mind while buying a GPS system that how often you will be using it and for the automotive GPS device you will be required to keep in mind the layout of your car or vehicle.

A GPS system should be able to give you multiple ways to get where you are heading so make sure that it is equipped with this feature also.

The GPS system should have vocal and graphic directions both so that the concentration is not lost while on the road. Another very important feature would be to keep in mind the installation time of the GPS system you plan to buy. If the automotive GPS takes longer time to install then it means more cost. Another thing to be taken into consideration is the battery life.

When you are planning to buy a GPS system then check for the option of conserving power of by hibernating when not in use. A good GPS system should come with the above mentioned features and functions depending on how you have to use it and the affordability factor should also be kept in mind. The customized options, the zip code search function, text to speech feature, multi dimension routing, lane assistance, reality view maps and also the ability to search for the POI (points of interest) close to your current location.

The portable GPS systems will cost less giving you the option of moving them between vehicles or taking them with you whenever traveling. There are also built in systems available. If you plan to use your GPS while walking, you'll want something smaller. Prices differ depending upon the brand and the features of the GPS system. So with all these useful different features and functions you should be able to find the GPS best suited for your requirement. But with more advanced features and better technology you would want to go for the most sophisticated GPS system.




Find Cheap Car GPS, compare prices from leading brands like Garmin, Becker and Navman GPS Systems at GPS System Reviews website.





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