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Royal Robbins resting on his aiders during the 3rd pitch of the FA of the Salathé Wall (VI 5.9 C2). Aid climbing traces its origins to the start of all climbing, with ladders used on historic ascents such as the 1492 ascent of Mont Aiguille, the 1786 ascent of Mont Blanc, or the 1893 ascent of Devils Tower, and with drilled bolts on historic ascents such as the 1875 first ascent of Half Dome.
In aid climbing (i.e. the opposite of free climbing), the most widely used system is the A-grade system (e.g. A3+), which was recalibrated in the 1990s as the "new wave" system from the legacy A-grade system. For "clean aid climbing" (i.e. aid climbing equipment is used but only where the equipment is temporary and not permanently hammered into ...
First-free-ascents that set new grade milestones are important events in rock climbing history, and are listed below. While sport climbing has dominated absolute-grade milestones since the mid-1980s (i.e. are now the highest grades), milestones for modern traditional climbing, free solo climbing, onsighted, and flashed ascents, are also listed.
Continuous-wave radar (CW radar) is a type of radar system where a known stable frequency continuous wave radio energy is transmitted and then received from any reflecting objects. [1] Individual objects can be detected using the Doppler effect , which causes the received signal to have a different frequency from the transmitted signal ...
A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance. [1] It does this by bouncing a microwave signal off a desired target and analyzing how the object's motion has altered the frequency of the returned signal.
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The city of Austin has opened 300 new apartments on its south side to provide low-income families with affordable housing, and is also offering $3.6 million in grants to help with rental ...
KTBC (channel 7) is a television station in Austin, Texas, United States, serving as the market's Fox network outlet. It is owned and operated by the network's Fox Television Stations division, and maintains studios on East 10th Street near the Texas State Capitol in downtown Austin; its transmitter is based at the West Austin Antenna Farm on Mount Larson.