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Isar biography, Isar discography
Send a message to ISAR using our online form.Help others learn how to save the environment.Give us feeback about our new website.For more than 20 years, ISAR has worked with a network of offices and partners in Belarus, Central Asia, the Caucasus, Russia, and the Western NIS.ISAR's mission is to support citizen activists and grassroots nongovernmental organizations in their efforts to create just and sustainable societies.Currently, ISAR is implementing that mission most actively in Belarus, with an information and small grant program.ISAR invites you to explore our archived publications and return to read the latest ISAR news.Take Archive and the Surviving Together Archive.In situations where other radars display only a single unidentifiable bright moving pixel, the ISAR image is often adequate to discriminate between various missiles, military aircraft, and civilian aircraft.Radar Cross Section (RCS) Imaging
Images of the target region produced by ISAR can be a useful tool in locating scattering regions on the target.ISAR images are produced by rotating the target and processing the resultant doppler histories of the scattering centers.The rotation will result in the generation of cross range dependent doppler frequencies which can be sorted by a Fourier transform.For small angles, an ISAR image is the 2 dimensional Fourier transform of the received signal as a function of frequency and target aspect angle.At this point the synthetic aperture is within the target nearfield region and requires focusing.ISAR Applications
ISAR is utilized in maritime surveillance for the classification of ships and other objects.For instance a feature which extends far over the surface of a ship such as a mast will provide a high sinusoidal response which is clearly identifiable in a two dimensional image.Research has also been done with land based ISAR.Errors in ISAR
Errors in the ISAR imaging process generally result in defocusing and geometry errors in the image.ISAR transform errors include:
UNKNOWN TARGET OR ANTENNA MOTION: Unmodeled motion will cause the target image to defocus and be at an incorrect location.This error can be measured by the analytic signal phase measurement method described earlier.VERTICAL NEARFIELD ERRORS: Unless 3D ISAR is performed, the vertical target extent at right angles to the horizontal synthetic aperture must fit within the vertical far field limit.Tall targets will defocus and move to incorrect positions.The 2D ISAR representation of a target region is a planar surface.INTEGRATED SIDELOBE RETURN: ISAR image quality is degraded by range and azimuth compression side lobes.The sidelobes can cause significant image degradation.The SIM program described earlier specifically monitors for aliening errors effectively eliminating this error source.Full correction of the aberrations can be accomplished by a direct integration of the ISAR transform using the aberrated geometry.CW ISAR imaging or in some cases preprocessing prior to a FMCW ISAR transform an eliminate dispersive defocusing of the target image.MULTIPATH: Multiple reflections can result in ISAR imaging distortions such as the classic ghost image trails from jet aircraft tail pipes.Errors in the 2D planar Inverse ISAR transform include:
IMAGE BLOCKING MODELING ERRORS: The Inverse ISAR transform currently assumes that scatters are on a planar surface and cannot block other scatters.IMAGE MULTIPATH MODELING ERRORS: The Inverse ISAR transform currently does not model the multipath environment.Note the current ISAR transforms also do not correctly process multipath.This page was last modified on 8 October 2008, at 04:49.All text is available under the terms of the GNU Free Documentation License.For articles relating to the acronym of the same spelling, see ISAR.The river Isar near Munich.The Isar is a river in Tirol, Austria and Bavaria, Germany.Munich, and Landshut before reaching the Danube near Deggendorf.At 295 km in length, it is the fourth largest river in Bavaria, after the Danube, Inn, and Main.Etymology
According to the most common interpretation the name Isar is a construction of the Celtic words ys (fast, torrential) and ura (water, river).France)
Isel (Austria)
IJssel (Netherlands)
IJzer (Belgium)
Isarco (Italy)
Isar (Spanish town, in the province of Burgos)
It may be possible that the ancient name of the lower part of the river Danube, Ister, has the same source.The river Isar near Garmisch.The Isar drains a substantial part of the Alps and parts of the Karwendel mountains northeast towards the Danube river and thus finally towards the Black Sea.It has an average discharge of 175 cubic meters (6,200 cubic feet) per second.Germany, like the Moselle, Lech or Main.Dorfen, the Sempt and the Pfettrach.The official head of the Isar is located in the Hinterau valley east of the village Scharnitz in the Karwendel mountains in Tyrol, Austria at a sea level of 1,160 meters ( 3,500 feet).Further on the young Isar is supplied water by the Birkkarbach which has its source at the foot of the highest mountain of the Karwendel, the Birkkarspitze and the Moserkarbach.Isar is dammed for the first time.Its waters are led into the lake Walchensee where electricity is generated.It has prevented some bad floods in Munich, for example in 1979, 1999 and most important, in 2005 In that year for the first time ever water had to be released from the lake because its capacity was exhausted.Flooding was barely avoided in Munich.Isar first flows through the glacial morainic landscape and then through the Munich plain.It continues from Freising on through the tertiary hills all the way into the Danube valley.Its mouth at the Danube is at 312 meters (950 ft) above sea level, thus the Isar descends some 848 meters (2,600 ft) from its head to its mouth.Islands
Most of the small islands and gravel banks keep changing shape and size due to the annual floods.Some of the islands within the bigger cities were built up during the 19th century and thus protected against the abrasive powers of the water.It is quite likely that the Isar was used as a trade route even in prehistoric times in order to transport wares from the Alps and even Italy towards the Danube with rafts.The town of Mittenwald thus became an important trade post in the Werdenfelser Land.At a few places the Romans built wooden bridges across the Isar so they could cross the river with its strong currents more easily.Thus trade traffic could easily be controlled and income from tolls was frequent and regular.Beginning in the 17th century wares like Mediterranean fruit, spices, cotton and silk from the Venetian Market in Mittenwald were transported down the Isar and Danube all the way to Vienna and Budapest.During the 19th century when commercial rafting was at its peak, some 8,000 rafts arrived in Munich each year.Since the Middle Ages water mills were working at the banks of the Isar by hydro mechanical power.In order to ensure a more constant flow for the mills the water in Munich was led into small canals.During the annual floodings cities along the Isar were flooded again and again, causing severe damage and even killing people.This led to its deeper digging into the river bed due to its flowing faster.Further extensive measures have been taken since the 1920s in order to install hydroelectric power plants.Sylvensteinspeicher was built for the generation of electricity and for protection against floodings.The village of Fall was drowned in the reservoir.Only over the last few years the Isar was partly turned back from a canal into a more natural river.Mr Maltby is one of the best geographists of the modern time he researched a lot about the Isar resources and the influence on the people living around the Isar.Since the 1920s the water of the Isar has been used for the generation of electricity.Walchensee in 1923 in order to provide it for the Walchensee hydroelectric plant.The construction of the Sylvenstein dam has prevented the river from overflowing its banks.Lately, there have been attempts to bring the Isar closer back to a natural character.Together with other cities and communities along the Isar, Munich has set a goal to reduce the number of germs until the water quality is good enough to allow bathing in the river.The sewer plants on the upper river are now treating the sewage with ultraviolet light, which greatly reduces the number of germs, but still the Isar cannot be guaranteed safe to bathe in because of the entrance of polluted rainwater into the river, especially during strong precipitation.Mittlere Isarstauseen northeast of Moosburg.There has been evidence for more than 260 different species of birds, among them rare species like the Common Tern and the Bluethroat.In order to achieve this goal, this first civil initiative from Munich purchased 90 hectares (220 acres) of land and is, today, maintaining more than 330 km (205 miles) of hiking trails.Recreation
There are several areas along the river Isar which have been designated since the 1960s as nudist resorts.All text is available under the terms of the GNU Free Documentation License.English: The Isar is a river in Austria and Germany.More pictures of river Isar: Munich, Auer Muehlbach.Gallery Flaucher, for images of that special part of river Isar in the southern part of Munich.This page was last modified on 19 November 2008, at 20:20.Text is available under GNU Free Documentation License.International Symposium on Audit Research (ISAR) ISAR 2009The 15th Annual International Symposium on Audit Research (ISAR 2009) will be hosted in Maastricht, Netherlands by Universiteit Maastricht on 26 and 27 June 2009.The Call for Papers is now available.The full program for ISAR 2008 had 20 academic papers and two panels.About ISARThe International Symposium on Audit Research (ISAR) was formed in 1995 from a merger of two previous audit research symposia: the USC Audit Judgment Symposium and the Maastricht Audit Research Symposium.University of Southern California (USA), Universiteit Maastricht (Netherlands), Nanyang Technological University (Singapore), and the University of New South Wales (Australia).The Symposium is held annually and is organised by each University in turn.Sign up for our ISAR email news update.Welcome to the Institute for the Study of Academic Racism (ISAR).You will receive an email with the link to your ISAR report.Click here to purchase a printed copy of this landmark report.Join our award mailing list.It was good to see the quality of the entries.Thank you for the opportunity to enter.
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