How would pilots ever get around so easily without the help of navigation aides? Navigational aides have been around for almost as long as aircraft have been flying in the skies above us. The first navigation system was composted of just a high intensity-flashing beacon. These beacons were placed on the flight routes that were popularly flown in the mid 1920’s. With more time more of these technologies that help us navigate the world will be even simpler than today. This paper will explain how some navigational aides work and how some of them came into existence.
Flight Management Systems
Flight management systems are one of the best navaids in commercial aviation. The flight management system (FMS) is made up of four systems in an aircraft, the FMC (flight management computer), the autopilot and flight director, the auto throttle, and the IRS’s. According to Boeing the FMS could be defined as, being capable of four dimensional area navigation (latitude, longitude, altitude, and time), while optimizing performance to achieve the most economical flight possible. The flight management system can give you gross weight of the aircraft, and the best speeds (i.e. holding, approach, climb, cruise, descent, etc…) by taking inputs from the fuel summation unit when it is given the zero fuel weight and the MACTOW (mean aerodynamic cord at takeoff weight). The position of the aircraft can also be determined by referencing the IRS, along with GPS and the radio position updating.
Global Positioning Systems
GPS is a navigational aid that is satellite based. It is made up of a network of 24 satellites in orbit around the world. The first satellite was launched in 1978 and the last was put into orbit in 1994. Every 10 years another satellite is put into orbit because each satellite is made to last that amount of time. The system began as a military application but in the 1980’s the government decided to make it available to everyone, anywhere, anytime. The system finds your position by measuring the time it takes to receive the signal back to the satellite. It then does that with other satellites to triangulate your position in relation to the earth. To calculate a position in 2D the system has to be locked on to at least three satellites, but for a 3D representation you need to be locked on to at least 4 satellites. Once the position is found the GPS can calculate much more info like speed, bearing, track, distance, etc… The GPS system is very accurate; Garmin (a leader in GPS technology) states that their newest receiver is accurate up to an average of 15 meters.
2. Battle Management, Command, Control, and Communications (BM/C3): The BM/C3 component is divided into two main parts. First, the Command and Control (BM/C2) system controls the overall NMD system. Information from sensors is forwarded to the BM/C2, which processes the data and determines the targets for the GBI to intercept. Second, the In-Flight Interceptor Communications System (IFICS) is a network of ground systems that relay communications to the GBI while in flight to guide it to the incoming warhead.
on this built in compass sense to guide them in the open ocean. Another use for
The use of Global Positioning System navigation technology was established in the early 1970’s, long before the idea of a GPS “safely bubble” existed. Up to this time the required satellite technology to support global positioning systems had not been developed. In 1978 the first GPS satellite was launched (Rand McNally). It took nearly fifteen years to perfect GPS for public use, but since this has happened, land navigation has been revolutionized. GPS was initially developed by the Department of Defense for primarily military uses, but has since been made available to the general public. In 1996 the National Security Council published the following goals for the GPS system:
Aviation has come a long way since the 19th century, from the Wright brothers taking flight with the first powered and controlled gliders, to aircraft that can travel up to supersonic speeds, orbiting satellites and space stations which then were only thought to be science-fiction. Aerospace and aviation has proven to be one of the biggest challenges to advance in the entirety of human existence. There are many factors and characteristics that contributed to this advancement such as the engines of aircraft, forces of flight, aerodynamic forces, wingspans etc. The two most significant aspects however have been; World War 1 and World War 2.
The invention of the GPS started with Dr. Ivan Getting leaving his position at Raytheon Company, and armed with the knowledge of what was at the time the most advanced navigational technology in the world, they began developing the Global Positioning System. He, Roger L. Easton, and Bradford Parkison began in the 60’s with a constellation of 24 satellites (placed in six orbital planes) orbiting the earth at a very high altitude (about
...regarded GPS – an indispensable part of GIS. Discussions on cartographic principles, commercial GIS software programs, satellite images, aerial photos, and geodatabases are some of the other conspicuous omissions in this book. There is an inconsistency in the depth of topics explored; for example map projections are explored in great depth, while vector topology is merely glossed over. These omissions and inconsistencies would in my opinion make this book marginally less beneficial to all the three audiences together. However, there is something for all them; structure for engineers, equations for engineers and students, and GIS concepts for students, engineers and users. This book will therefore be undeniably valuable if used to complement the material in some of the other fundamental GIS books in the discipline. It has merits, but there is room for improvement.
Geographers plan new communities, decide where new highways should be placed, and establish evacuation plans. Computerized mapping and data analysis is known as Geographic Information Systems (GIS), a new frontier in geography. Spatial data is gathered on a variety of subjects and input onto a computer. GIS users can create an infinite number of maps by requesting portions of the data to plot.
The following is a brief illustration of the principles of GPS. For more information see previous chapter. The Global positioning System (GPS) is a satellite-base navigation system that provides a user with proper equipment access to positioning information. The most commonly used approaches for GPS positioning are the Iterative Least Square (ILS) and the Kalman Filter (EKF) methods. Both of them are based on psuedorange equation:
GIS is an emerging method of data storage and interpretation. GIS is, simply put a database. It is many tables of data organized by one common denominator, location. The data in a GIS system is organized spatially, or by its physical location on the base map. The information that is stored in the database is the location and attributes that exist in that base map, such as streets, highways, water lines, sewers, manholes, properties, and buildings, etc. each of these items don’t just exist in the database, the attributes associated with the item is also stored. A good example of this would be a specific sewer line, from and arbitrary point A to a point B. Ideally, the sewer line would be represented graphically, with a line connecting the two points or something of the like. When one retrieves the information for that line in particular, the attribute data would be shown. This data would include the size of pipe, the pipe material, the upper invert elevation, the downstream invert elevation, the date installed, and any problem history associated with that line. This is the very gist of what a GIS system is.
The use of technology makes our daily tasks easier, such as a better sense of direction while driving via a GPS, safety features in our cars such as Auto Drive and Auto Park. These technologies have made driving an easier and enjoyable experience as well as reducing our chances of getting into accidents. The research presented in the following article “Driven to Distraction [in car technology]” provided surprising conclusions. Professor John D Lee from the University of Iowa states the following issue: “Technology is changing very quickly. Many of these things coming into the car were not designed to be used in it.”(Edwards 8). He proves that there are a lot of in car technologies in today’s society that can demand our full attention without us even knowing, and can lead to tremendous consequences that can become dangerous distractions on the road. Satellite navigation (GPS) makes our lives easier because it can give us the correct directions to a desired address. This is unlike the past where the navigationally challenged would consider it a nightmare to drive to a new location.
‘ICAO Performance Based Navigation (PBN) Programme’, 2011, ICAO [Online] Available , Accessed 15 June 2011.
There was a time a person would use a roadmap to get from one location to another. Some also would stop and ask for directions. Today, you seldom see paper maps and people stopping at a local gas station for directions. Many vehicles come with a navigation system that provides a real-time map of the vehicle’s current location as well as systematic directions to requested destination.
Heads-Up Displays (HUD) are now used in many aircrafts so as to display information on the screen without needing the driver to cause distraction or to move their attention from the road. It was in the 1950’s that the Royal Aircraft Establishment in Farnborough started the Development of Heads-Up Displays for military flights. (Quarrington, 1966)
The Global Positioning System, more commonly called the GPS is a satellite based system that provides navigation for almost everything from cell phones to automobiles. This wonderful technology is very vital in today’s economy because of its prominence in banking, financial markets, power grids, farming, construction and so much more. It also protects human life by preventing accidents, helping in search and rescue missions and is critical to nearly every facet of military operations. There are three segments that make up the global positioning system: the space segment, the control segment and the user segment. The segment we are familiar with is the user segment. The user segment is what receives GPS signals, determines the distance between a satellite and a receiver and solves the navigation equations, all in order to obtain the coordinates of a specific place. The space segment consists of 31 satellites but there is an availability of at least 24 satellites that are approximately 6 000-12 000 miles above the earth.
GPS is a system of satellites radio-transmitters that orbit the planet in great numbers; their purpose is to be able to pinpoint the exact location of an individual or any type of vessel that is equipped with a receiver transmitter within a very small radius. GPS navigation has had a great impact upon society in general as well and its commercial and military applications. Global Positioning is made available at no cost to anyone who has a GPS receiver unit anywhere on the planet. A GPS unit is able to give the user longitude/latitude information as well as, altitude, traveling speed, distance traveled, distance remaining and time in any type of weather conditions imaginable.