Global Positioning Systems (GPS)
The Global Positioning System is a satellite-based navigational system that provides dependable time and location information of a receiver. Maintained by the U.S. government, it is originally intended for military applications and later made freely accessible for civilian use.
Which GPS systems are used in Israel?
There are no "local" differences in GPS receivers (unlike TV receivers, for example, with NTSC or PAL). The GPS system consist of about 2 dozen satellites that are positioned around the globe. Any GPS receiver will work in any given location, as long as the signal is accessible. Only mountain terrain - with deep valleys or certain downtown areas with high-rise buildings - may block out the signal in a few locations.
Asked in Global Positioning Systems (GPS), Ghana
List of current ministers of Ghana?
CURRENT MINISTER OF FININCE GHANA 2009: HON. DR. KWABENA DUFFOUR Email- firstname.lastname@example.org Attorney-General and Minister of Justice-Mrs. Betty Mould Iddrisu Health Minister- Dr George Sipa Yankey Minister of the Interior-Mr Cletus Avoka Minister of Tourism-Juliana Azumah-Mensah Brong-Ahafo Regional Minister-Mr. Kwadwo Nyamekye-Marfo Minister of Communications- Haruna Iddrisu, Defence Minister, Lt. General Joseph Henry Smith Minister of Water Resources, Works and Housing- Mr Albert Abongo Minister of Education-Mr Alex Tettey-Enyo Minister of Trade and Industry-Ms. Hannah Tetteh, Minister of Lands and Natural Resources- Alhaji Collins Dauda Minister for Water Resources works and Housing-Albert Abongo Upper West Regional Minister-Mr Mahmud Khalid, Western Regional Minister-Mr. Anthony Evans Amoah Minister of Women and Children's Affairs-Akua Sena Dansua, Minister of Employment and Social Welfare-Stephen Amoanor Kwao Minister for Local Government and Rural Development- Mr. Joseph Yile Chireh Minister for Transport- Mr. Mike Allen Hammah Minister for Roads and Highways- Mr. Joe Gidisu C
How many satellites make up the US Global navigation satellite system 24 or 27 or other?
What car is being advertised in the commercial that has the older man in the back seat giving directions instead of a navigation system?
What are advantages of global positioning systems?
Advantages of GPS Depending on what you are using it for, and the rating of your system it could be invaluable. I have a hand held and lap-top connected GPS. The advantages of having either is determining your exact position. While traveling through Albany, GA, I became lost. Looking for a place to pull over and ask directions (late at night) very few places were open. Liquor stores--OUT, bars--OUT, I needed a place that would be knowledgable and safe. I saw a Dominoes delivery place...who better would know their way around town than a pizza delivery joint? The guy gave me excellent directions...to the hood! OK, I needed a place that was knowledgable, safe and trustworthy. I saw a cop at a 7-11 and found out I was headed for "gang land" (his words). After that, bought a middle of the road hand held GPS from Wal-Mart, and never again pulled over. I've also used it on camping and canoeing expeditions. Consider it the "cheaters" map. The advantages of GPS over a map is 100 fold, GPS is not infoulable though, the military can turn off the satelites or render them "not as accurate" for a number of reasons, most importantly to render enemy GPS guided munitions inoperative. Having an understanding of maps is always a good back up. A friend of mine obtained her private pilots license and innappropriately used GPS for guidance. When the batteries failed, she was lost. One of the Best Advantage is that Using GPS , one can locate any gps devicce which is connected through satellite . Almost Every Country uses this technology from crime field to intelligency fields .
How many GPS satellites are there and when were they put in orbit?
GPS Satellites There are 30 GPS satellites -- called NAVSTARs -- in place and the oldest one was launched in 1989. These are just the ones in operation now -- another 22 have been launched since the program started in 1978, but are no longer working. The design of the satellites has remained essentially the same over the years; the differences have just been in their operations. The first 11 satellites, known as Group I and designed by Rockwell International, were launched into orbit between 1978 and 1985 from Vandenburg Air Force Base in California. Each of these satellites contained one Cesium and two Rubidium atomic clocks and could provide navigation and standard positioning information. Continuous contact with the Ground Control Segment (CS) was required for their operation. They were designed to last five years, but most lasted much longer. The next group of 9 satellites are called Group II and were also designed by Rockwell. These were the first to provide precision positioning information for military use and to be able to operate for 14 days without contact with the CS. Group II satellites contained four clocks two Cesium and two Rubidium and were launched between February 1989 and October 1990 from Cape Canaveral Air Force Station in Florida. They were designed to last 7.3 years and two currently remain in operation. The Group IIA satellites were next group to be designed by Rockwell and numbered 19. They are similar to the Group II satellites, except they have the ability to operate 180 days without contact with CS. These were launched from Cape Canaveral between November 1990 and November 1997. All but three of these satellites are still in operation. The most recent type, Group IIR, were designed by Lockheed Martin and each have three Rubidium clocks. They were designed to provide more accurate information through a combination of ranging techniques and communication between the satellites. They are also designed to last slightly longer (7.8 years) and to have improved independent controls. There are currently 12 such satellites in orbit the most recent launched in November 2004. The satellites are launched via a Delta II rocket designed by Boeing. These are expendable launch vehicles (ELVs), meaning they are intended for one use only. Each of these ELVs consists of the following: Stage I which contains fuel and oxygen tanks to supply the main engine during its climb; Solid rocket booster motors to provide additional thrust during the first two minutes of flight; Stage II which contains the fuel and oxidizer tanks that supply the engine needed to insert the ELV into orbit and the brains of the ELV, including its guidance system; Stage III that has a solid rocket motor to provide any needed velocity change. More input from others: According to SMC Fact Sheet (URL http://www.losangeles.af.mil/smc/pa/fact_sheets/gps_fs.htm), as well as Garmin (URL http://www.garmin.com/aboutGPS/), there are 24 satellites in the system with an additional 4 on reserve.
How do use the navigation system in 2011 Buick Lacrosse?
How do you sync your iPod to a different computer?
An iPod can only be synced to one iTunes Library at a time (each computer has a different library). This means that, if you want to change the computer you manage your iPod with, it will need to be re-synced to the computer in question. To do this, connect your iPod to the computer you'd rather manage your iPod on. A popup from iTunes will say something along the lines of "This iPod is currently synced to a different Library. Would you like you sync this iPod to this Library instead?" Click Yes. After that, all the previous information from your other computer's iTunes Library will be erased and replaced with everything that you just synced your iPod with. From there, you can freely sync your iPod with that computer as you normally would.
Asked in Global Positioning Systems (GPS)
How do you build a low-cost GPS tracking device at home?
Low Cost Home Built GPS Device? I would not even attempt to do this and I am an electronics design engineer. It would involve a satellite receiver and transmitter and lots of custom chips, and there probably is no way to build a low-cost unit compared to commercial units. In other words you would be better off buying a commercial unit. That said, it is possible there is a kit for a GPS tracking device which is less than a commercially built unit. Any such kit would either: Come with a fully preassembled and tested GPS receiver module. (you might as well just buy a complete unit, price would be similar) Use surface mount components that would require the home builder purchase or lease thousands of dollars of specialized reflow soldering tools to assemble it. (kit might be low cost, assembling it won't be) When assembled the finished unit would consist of several cards and occupy over a cubic foot of space. (low cost but not portable)
How is science a curse?
Science has made our world so dirty ,the industrialists are throwing their waste off in rivers, lakes and other water bodies.Science has made our lives so easier that we are not taking care of anything, anyone etc. We are putting all around atom and hydrogen bombs, are we all realizing the real impact of that.Because of science only we have to suffer of global warming, melting of glaciers etc.
How do you replace a tomtom battery?
I have TomTom 910 in USA, (and I have one in the UK). Access to the battery is behind the front screen but the plug is under the circuit boards. 1) Remove 4 screws under ends of rubber strips on back. (All screws are Torx number 6) 2) Remove back cover. Front frame around screen comes off easier now. 3) Remove 2 screws in round top circuit board. Remove 4 screws from lower circuit board. These two boards may have a glue connection. Do not worry if it separates 4) Lay back circuit boards to unplug battery. Note flat ribbon cables are fragile. The 3 wire plug is the battery. Unplug wires to battery from receptacle on circuit board. 5) Remove front screen by pressing a screwdriver against the small metal tags that follow the edge of the screen. The tabs need to be pushed in slightly to allow you to lift the screen out. It may need some leverage, but be careful not to put the screwdriver to far behind the screen as there are a couple of thin cables for the connections. 6) To remove the hard drive you may need to unscrew the vertical black tags about 2 cm long. These simply come away and are grasping the business card size silver box IE the hard drive. The rubber end caps are pressed in, pry out with small screw driver. 7) Remove battery and replace. Note the two sided sticky tape around battery. When putting more tape on, be careful you do not put to much around the right hand end as it will connect with the thin cable when you put it all back together. 9) Reverse assembly. Mine works fine now, good luck. (and so does mine! BLP) Footnotes: I did not have a Torx #6 screwdriver nor could I buy one locally. I found a #7 mini star bit works just fine. Source: Harbor Freight item # 93316, 6 piece Mini Star Bit Set - $3 PMVN - 9/19/2009 I am not advertising but Batteryship.com included with the battery #5 & #6 torx screwdrivers, a very small Philips (star), a straight screwdriver and a plastic pry tool. Whatever I paid more than another place it was worth it. When disassembling do not remove the battery clip. Just pop out the battery from the front (experienced having to reassemble that whole thing). Also having a set of tweezers to put the electrical connections back together helped a bunch.
Why gmsk is used for gsm?
GMSK for GSM GMSK is used in GSM because it provides good spectral efficiency. i think 8-psk modulation is also used..... for edge hardware. Well the reason GMSK is used for GSM.1. High spectral Efficiency2. Since Basic MSK uses Phase variations for modulation so better immune to noise.3.Use of non-linear amplifiers at receivers can be utilized since the information is stored in phase variations rather than amplitude, Non-linear amplifiers give better response and consume less power so low battery usage which is a important parameter in Cellular technology.
What is GPS?
GPS stands for Global Positioning System and is a satellite-based radio navigation system. While common use of the term GPS began relatively recently, the system dates back to the 1960s when it was first developed and operated by the U.S. Department of Defense (DOD). In 1966, a Presidential Decision Directive was issued and later passed into law that transferred the "ownership" of the system to an Interagency GPS Executive Board (IGEB), with representatives from DOD, the U.S. Department of Transportation and other government agencies. This transfer was done primarily to make sure GPS could be used effectively for both civil and military user needs. GPS itself is made up of three component groups - the satellite constellation, ground control segment, and user equipment. The satellite constellation is often referred to as NAVSTAR (Navigation Satellite Timing and Ranging) and currently consists of 30 satellites. Groups of five satellites loop around the earth in one of six different orbital paths. This allows a system user with a clear view of the sky to have access to a minimum of four satellites at any one time, but more commonly six to eight. The paths the satellites follow are the earth are circular and are about 60o apart. (To visualize these, imagine a pie cut into 6 pieces and then envision the pie being round instead of flat.) A satellite takes about 12 hours to complete one orbit or, in other words, will travel around the earth twice in one day. The Ground Control Segment consists of the Master Control Station (MCS) and six monitoring stations. The MCS, based near Colorado Springs, Colorado, at on Schriever Air Force Base, controls and operates the system. The monitoring stations are located around the world at Ascension Island, Diego Garcia, Kwajalein , Hawaii , Cape Canaveral and Colorado Springs. These stations continuously track and collect data from the satellites and have two cesium clocks referenced to GPS system time to ensure consistency. (Note: GPS system time is slightly ahead of Coordinated Universal Time (UTC), which is maintained by atomic clocks. The reason is that GPS does not make adjustments, like UTC does, to track with solar time. However, a GPS receiver does make a clock adjustment so the user is on UTC time.) The third component of the GPS system is the user equipment, commonly called GPS receivers. These range from navigation systems found on planes and in cars to hand held devices now available. A receiver uses signals received from three or more satellites to determine the position of the user. GPS, or Global Positioning System, is used to fix one's position on the Earth through the very accurate timing of signals from satellites. It's applications are many and varied, ranging from aircraft and ship navigation, to geocaching (treasure hunting) for individuals. There are also a multitude of military applications for GPS. http://en.wikipedia.org/wiki/Global_Positioning_System it is a service provided by a set of American satellites that allows a device in many locations on the world to determine it's latitude and longitude, usually with a maximal accuracy of ~10 meters, but can be more or less depending on weather, being indoors/outdoors (usually doesn't work indoors), or quality of device. GPS, or Global Positioning System, is a system that allows for the localization of any place on Earth; navigation of boats or planes and more precise mapping. It can do so due to a network of 24 satellites (each one circles Earth in a period of 12 hours and transmits microwave signals in pre-determined intervals of 1ms). For the calculations, the triangulation technique is used, a method of determining the relative positions of objects using the geometry of triangles.
How does a periscope work?
Old trench periscopes worked by using two mirrors to bounce light from one place to another. A typical periscope uses two mirrors at 45 degree angles to the direction one desires to see. The light bounces from one to the other and then out to the persons eye. If there is an object in front of you, any nearby light source (i.e the sun, a lamp etc.) bounces straight rays of light onto the object and then into your eyes, enabling you to see it. However, if the object is not within straight lines of your eyes, the light will not find them and you will not be able to see the object (since light only travels in straight lines). But a periscope works using the laws of reflection. Reflective objects like mirrors work by bouncing light so it carries on in a straight line but alters it's route, according to the angle of the mirror to the light source. This means that if the mirror was at a 45 degree angle to the light source then it would bounce off at a perpendicular (90 degree) angle. That is how a periscope works. The important fact to note when considering a periscope is that the laws of reflection mean that the light hitting a mirror at an angle is reflected off at twice the angle of the mirror. Thus a 45 degree mirror reflects light rays through 90 degrees. Submarine Periscopes Submarine optical periscopes don't use mirrors due to their fragility and susceptibility to environmental conditions/changes, requiring special coatings. Instead, they use refractive prisms. The newer U.S. Virginia-class and British Astute-class boats use neither; they use a Photonics Mast, which is essentially a hi-resolution camera array that is raised above the waterline. This has many advantages, the primary one being that the Control Room need not be directly under the main sail as in all previous modern submarine designs.