gps |
||
garmin rino gps |
chip gps receiverThe GPS or Global Positioning System is a global navigation system used for military and civilian applications alike.
Hand-held GPS units are often used by hikers and mountain climbers to plot their courses and to accurately reflect exactly where they are. The author once used GPS to organize a helicopter evacuation of an injured motorcycle rider in a remote region of the La Sal mountains in Utah. A reading was taken, coordinates given, and the pilot was able to find us with ease. The United States Department of Defense developed the system, officially named NAVSTAR GPS (Navigation Signal Timing and Ranging GPS), and the satellites are managed by the 50th Space Wing at Schriever Air Force Base. Although the cost of maintaining the system is significant, GPS is available for free use in civilian and commercial applications. GPS has become a vital global utility, indispensable for modern navigation on land, sea, and air around the world, as well as an important tool for map-making, and land surveying. GPS also provides an extremely precise time reference, required for telecommunications and some scientific research, including the study of earthquakes. One of biggest problems for GPS accuracy is that changing atmospheric conditions change the speed of the GPS signals unpredictably as they pass through the ionosphere. The effect is minimized when the satellite is directly overhead and becomes greater toward the horizon, as the satellite signals must travel through the greater "thickness" of the ionosphere as the angle increases. Once the receiver's rough location is known, an internal mathematical model can be used to estimate and correct for the error. During the Gulf War, the shortage of military GPS units and the wide availability of civilian ones among personnel resulted in disabling the Selective Availability. In the 1990s the FAA started pressuring the military to turn off SA permanently. This would save the FAA millions of dollars every year in maintenance of their own, less accurate, radio navigation systems. The military resisted for most of the 1990s, but SA was eventually turned off in 2000 following an announcement by then US President Bill Clinton, allowing all users to enjoy nearly the same level of access. More accurate GPS receivers are used these days in surveying to accurately locate boundaries, structures and so on. Selective Availablity typically added signal errors of up to about 10 m horizontally and 30 m vertically. The inaccuracy of the civilian signal was deliberately encoded so as not to change very quickly, for instance the entire eastern US area might read 30 m off, but 30 m off everywhere and in the same direction. In order to improve the usefulness of GPS for civilian navigation, Differential GPS was used by many civilian GPS receivers to greatly improve accuracy. Because GPS is as much an accurate time keeper as a locator, one of the most common applications for GPS units is as a reference clock for time code generators or NTP clocks. For instance, when monitoring earthquakes, each seismic sensor can be synched with the GPS system to provide a synchronized, precise time source for measurements. In 1996, President Bill Clinton issued a policy directive declaring GPS to be a dual-use system, meaning that it could be made avilable for a wide range of civilian and military purposes. The GPS system uses a satellite constellation of 24 satellites in intermediate circular orbits. The orbits are designed so at least four satellites are always within line of sight from almost any place on earth. The constellation also includes three spare satellites in orbit. GPS derives in part from its predecssor, the LORAN navigation system. LORAN was designed for ship and airplane navigation in the 1940s for use during World War II. GPS allows the military to accurately target its missile arsenal, largely composed of cruise missiles and precision-guided munitions. This was born out by the use of SOFLAM (Special Operations Forces Laser Acquisition Markers) targeting during the attacks on Tora Bora in Afghanistan. It also improves the accuracy of the US submarine launched ballistic missiles by providing precise locational information to the submarine commanders. Finally, command and control over troops is improved because commanders know precisely where their troops and the enemy are located on the battlefield. When it was first deployed, GPS included a feature called Selective Availability (or SA) that introduced intentional errors of up to a hundred meters into the publicly available navigation signals, making it difficult to use for guiding long range missiles to precise targets. Additional accuracy was available in the signal, but in an encrypted form that was only available to the United States military, its allies and a few others, mostly government users. Most ships and airplanes are equipped with GPS systems so that they can accurately plot on a map where they are. In planes, this is especially useful during bad weather, and in ships in knowing where shallow water and other sunken obstacles may lie. GPS signals can also be affected by multipath reflections of the radio signals off the ground and/or surrounding structures (buildings, canyon walls, etc). For long delay multipath signals, the receiver itself can filter the signals out. A variety of receiver techniques, most notably Narrow Correlator spacing, have been developed to mitigate multipath errors.
1. GPS Receiver Chip Performance Survey
GPS component manufacturers are in a race to produce GPS chip receivers at a lower cost and with increased sensitivity, reduced footprint size ... 2. GPS Chips Almost all GPS receivers based on this chipset can be switched ... Other GPS Chipset Manufacturers are listed here but their chips aren't used in ... 3. GPS - NaviLink 5.0 Solution: NL5350 NaviLink 5.0 single-chip GPS solution: NL5350 4. GPS receiver chips u-blox: provider of GPS receiver modules and chips, GPS software, GSM/UMTS modules and wireless 2G and 3G reference designs 5. Find GPS at gpschip.net gps, gps chip, gps watch, car gps receiver ... Garmin GPSMAP 76CSx Handheld GPS Receiver. 11 Reviews Marine GPS, Handheld, 256 Color LCD TFT Display, Accuracy: < 33 feet, 1000 ... 6. SiRFstar III - Wikipedia, the free encyclopedia A modern SiRFstarIII chip based 20-channel GPS receiver with WAAS/EGNOS support. ... The SiRFstarIII chip is distinguished from earlier SiRF chips and from GPS chipsets made ... 7. How to Choose a GPS Receiver: Expert Advice from REI All GPS receivers sold at REI perform four basic functions: location, distance/direction ... A high-sensitivity processor chip, such as the SiRF Star III, dramatically enhances ... 8. Global Positioning System - Wikipedia, the free encyclopedia GPS receivers are now integrated in many mobile phones. The Global Positioning System ... GPS satellites broadcast signals from space that GPS receivers use to ... 9. UBX-G5010 GPS and GALILEO single chip receiver The UBX-G5010 is the single chip version of the high performance u-blox 5 positioning engine. ... u-blox 5 GPS receiver single chip for consumer and automotive ... 10. GPS Receiver, GPS Receiver Chip - Princeton Technology Corp. GPS receiver manufacuturer, Princeton Technology Corp. supplies high quality GPS receivers manufactured in state-of-the-art facilities. 11. GPS Receivers and Bluetooth GPS Receiver Chips in Taiwan ... In Taiwan, GPS receiver and bluetooth GPS receiver chip manufacutrers, besides takingover international gps receiver companies' orders, also develop ... 12. GPS chip design GPS receivers have been miniaturized to just a few integrated ... Design a GPS chip which could be used in cars or ships, where power consumption is not a major constraint. ... 13. Atmel's Proven GPS Single-chip Receiver ICs with Highest ... Read this auto newswire article from : Atmel's Proven GPS Single-chip Receiver ICs with Highest Navigation Accuracy Now... 14. MAX2742 Single-Chip Global Positioning System Receiver Front-End The MAX2742 complete single-chip global positioning system (GPS) RF front-end utilizes many innovative and leading-edge RF CMOS design techniques. This high ... 15. A Single Chip Silicon Bipolar Receiver for GPS/GLONASS ... Describes a silicon bipolar ASIC design for high-end GPS receivers that delivers a reference frequency and IF outputs to allow for tracking of GLONASS satellites. 16. QuickView - MAX2742 Single-Chip Global Positioning System ... QuickView: The MAX2742 complete single-chip global positioning system (GPS) RF front-end utilizes many innovative and leading-edge RF CMOS design techniques. This ... 17. GPS receiver chipset from NavSync GPS receiver modules - specialized manufacturer of ultra high sensitive AGPS modules for the OEM marketplace. 18. gps chip, gps chip Manufacturers & Suppliers Alibaba - gps chip: gps chip Manufacturers & gps chip Suppliers. Find a reliable & professional gps chip manufacturer or supplier. Also exporters of wholesale gps chip. 19. SparkFun Electronics - 20 Channel EM-406A SiRF III Receiver ... GPS-00465. Product Info. 20 Channel EM-406A SiRF III Receiver with Antenna. sku: GPS-00465 ... This GPS engine really shines, easily handling conditions which throw Oncore VP, ... 20. Atheros, Wireless LAN, WLAN, 2.4/5-GHz, 802.11a/b/g, 802.11b ... The uN3010 single-chip GPS receiver features Orion v2.2 software which provides conventional GPS operation as well as support for 2G receiver dynamics. ... 21. IntelliGolf - IntelliGPS Certification The GPS-based smartphones (Section I), GPS-based handhelds (Section ... the Q 9h (courtesy of Motorola) and its GPS chip is accurate enough for golf. ... 22. Atmel Unveils Automotive Versions of its GPS Chips | GPS World Atmel Corp. has rolled out two automotive-grade GPS devices, the ATR0630P1 and ATR0635P1 chips, based on Atmel's GPS receiver devices, ATR0630 and ATR0635, which have ... 23. Alpha Micro - U-Blox GPS chips / receiver modules and ... Alpha Micro - U-Blox GPS chips / receiver modules and evaluation boards ... U-blox GPS modules allow navigational functionality to be more quickly embedded ... 24. Broadcom.com - GPS Silicon Solutions GPS Navigation Solutions, GPS, GPS chips, PNDs, GPS receivers, GPS processors, Global Positioning System and Personal Navigation Devices, BCM2075 ... 25. ANTARIS4 Single-chip GPS Receiver ATR0630 Single-chip GPS. Receiver. ATR0630. 4920D GPS 03/07. 2. 4920D GPS 03/07 ... is a low-power, single-chip GPS receiver, especially designed to meet the ... 26. EDN Access--03.03.97 Time, position, and velocity? Just ask ... Chip-set prices, meanwhile, have hit the $30 mark, making GPS ... DGPS increases the accuracy of GPS receivers, and all of the chip sets include the hardware necessary to ... 27. Welcome to SiRF Technology Host-based GPS Receiver Featuring SiRFaware Technology. The SiRFstarIV ... BOM cost and design risk while delivering industry-leading GPS performance. ... 28. NemeriX scores patent for single-chip GPS, GLONASS, Galileo ... NemeriX scores patent for single-chip GPS, GLONASS, Galileo receiver ... Among other things, the single-chip solution will allow for manufacturers to reduce the size of their ... 29. A 1.57-GHz RF front-end for triple conversion GPS receiver able, and today complete GPS receivers on a single silicon chip ... These single-chip receivers, although performing very well, are usually targeted toward ... 30. Dual-engine GPS chip enhances navigation accuracy unveils the AR1520 third-generation, single-chip GPS receiver based on the new Atheros FYX Location Core ... The dual engine GPS chip which comes with the Atheros FYX 1.0 ... 31. Poker Supplies: Poker Chips: Garmin Forerunner 305 GPS ... Garmin Forerunner 305 GPS Receiver With Heart Rate Monitor - Running GPS - Poker Chips - Poker Supplies -- the best place to shop for poker chips, books, DVDs, ... 32. GPS Receiver Survey - Yona Newman GPS chip set. MRFIC1504 RF front end. MMC2003 controller. LQFP48 ... Swift A2 oem GPS receiver (SiRF based) integrated ceramic patch antenna. 42x42x. 42. 3.3/150 ... 33. Epson's tiny GPS receiver will make everything location aware ... Small, right? That's Epson's Infineon XPOSYS chip, its next generation Assisted-GPS device set for mass production in late 2009. The chip measures ju 34. GPS receiver offers PCB footprint of 30mm178 Broadcom Corp. has unveiled its single-chip GPS solution for mobile devices that is said to set new standards in performance and low power consumption. 35. The Global Positioning System GPS provides specially coded satellite signals that can be processed in a GPS receiver, ... Modern receivers usually store a complete set of precomputed C/A code chips in ... } ?>
chip gps receiver online resources. |
|