Synthetic aperture radar

The surface of Venus was mapped in 1991 by the Magellan expedition, which revealed evidence of extensive volcanic activity on the planet--yet the timing of this volcanic activity remains a mystery. About 80 percent of Venus' surface is covered in volcanic material. Most of the volcanoes are believed to be inactive, yet there is some evidence to suggest more "recently" activity ("recent" in this context meaning within the last 500 million years). There are no lava nor caldera (craters created by volcanic collapse), which would seem to suggest the volcanoes have not been active in millennia. However, the surface of Venus has almost no impact craters, which suggests a relatively "new" surface (again, "new" referring to hundreds of millions…

roughness or prevailing geometric shapes from radar imagery (ALOS PALSAR, Radarsat-2). Martelet et al. (2006) used Agglomerative Hierarchical Clustering algorithm to classify airborne gamma-ray spectrometry data in French Guyana and noticed that ferralitic and bauxitic duricrusts display elevated U, Th content relative to K. In West Africa, Grimaud et al. (2015) used the Th/K ratio images to map the extent of the High glacis regolith surface. Regolith landform-maps were derived from gamma-ray…

start with its uses here at home with its work with US Customs and Border Patrol as well as NASA. For the US Customs and Border Patrol the primary function is to provide surveillance and reconnaissance along both the US and Mexican border and the US and Canadian border (GCN,2006) (Military.com,2014). These systems are not equipped with armament. I cannot figure out why the Customs and Border Patrol chose to use the MQ-9 Reaper instead of its predecessor the MQ-1 Predator. The only viable option…

The Other Side of the Lens Peering through the viewfinder, I adjusted the focal length of the lens. The girls flitted within the frame, fueled by a sugar-induced hysteria. All five cradled ice cream cones, exuberantly embracing each other with sticky hands. Crisp pine trees lined the path through camp, framing the elated chaos. With a click, I stopped down the aperture, extending the depth of field and drawing each member of my wacky sixth grade group into focus. Hitting the shutter, I captured…

During the period of 1885 to around 1920, Pictorialism photography dominated , which was likened to paintings as the image had visible brush strokes. Australian artist Harold Cazneaux produced images, which contained an atmospheric sense displayed by soft hues and grainy styles. This specific style was used throughout the world, and was also called the “Fuzzy Wuzzy Style”. Shortly after Pictorialism declined in popularity, Modernism was pioneered in Germany at the Bauhaus school of design. This…

1a) Air Traffic Control radar surveillance system Air traffic control (ATC) is a service provided by ground-based controllers who direct aircraft on the ground and in the air. The purpose of ATC systems worldwide is to separate aircraft to prevent collisions, to organize and expedite the flow of traffic, and to provide information and other support for pilots when able. b) The operating principles of ATC radar survelliance system Primary Radar Principle: The primary radar unit has a major…

their location being bombed, so thus became the evolution of radar. Radar, developed to see aircraft day or night, worked by using radio waves. The radar worked by shooting out waves through a directional antenna. These waves hit airborne aircraft, and then reflected back to the radar. The incoming waves caused a picture to appear on the radar screen. The picture that appeared on the screen of the aircraft depended on the amount of time it took for the wave signal to get back to headquarters…

of aviation was where most of the development into WW2 military aircraft came about with improved airframe, engine and avionics to serve the war. Compared with WW1, military aviation improved drastically from aircraft designs, but also in military airpower where tactics and strategies for air warfare were developed throughout. Throughout WW2 the aircraft was seen to be a valuable resource for the war, serving many different roles from fighter to bomber. The historical air combat dog fights and…

With the current doctrine before a SEAD mission is flown an E-8 JSTAR will fly near the area that the mission will be flown and detect all radar sources that are active (AFFTTP 3-1). This tells the pilots flying the SEAD mission in F-16CJs what type of SAMs are in the area and exactly where the SAMs are. This only works though if the radar is active if the radar is turned off the JSTAR is not able to locate the SAMs. Secondly as the mission is being prosecuted an EC-130H Compass Call flies…

1. Doppler radar systems provide information about the movement and position of targets. They work by sending a beam of electromagnetic waves at a specific frequency, at a moving object. When a microwave bounces off the object, its wavelength shifts as the object moves (this is known as the Doppler effect). The radar detects the shift and calculates how fast the object is traveling, along with it's location. 2. Polarized sunglasses block reflected light (glare). Since polarized light waves…