SAS

Sas is a name that may refer to:. See for example, Listening to Leonids (NASA, 2001) for details and references on the auditory phenomenon. SAS is a three-letter acronym which may refer to various groups, things, and people. Curiously, although the waves are electromagnetic, they can be heard: they are powerful enough to make grasses, plants, eyeglass frames, frizzy hair and other materials vibrate. . As the trail dissipates, megawatts of electromagnetic energy can be released, with a peak in the power spectrum at audio frequencies. Sas of Moldavia, a Voivode ruling over the lands of what was to become Moldavia between 1354-1358. Large meteoroids can leave behind very large ionization trails, which then interact with the Earth's magnetic field.

Sas (town), a town in North Brabant, Netherlands. Meteor radars can measure atmospheric density and winds by measuring the decay rate and Doppler shift of a meteor trail. Sas coat of arms, a Polish coat of arms. Snowpack information from the Sierra Nevada mountains in California is transmitted from remote sites via meteor scatter. Synthetic aperture sonar. Amateur radio operators sometimes use meteor scatter communication on VHF bands. Statements on Auditing Standards. Because the sporadic nature of meteor entry, such systems are limited to low data rates, typically 459600 baud.

Spatially Aware Sublayer, an optional sublayer of the MAC that provides spatial reuse in Resilient Packet Ring. Security arises from the fact that as a mirror, only receivers in the correct position will hear the transmitter, much as with a real mirror, what is seen in reflection depends upon one's position with respect to the mirror. Space activity suit. The basic idea of such a system is that such an ion trail will act as a mirror for radio waves, which can be bounced off the trail. Société par actions simplifiée, a type of corporation in France. Meteor scatter has been used for experimental secure military battlefield communications systems. Side-Angle-Side, a formula used to prove the congruence of two triangles. When radio waves are bounced off these trails, it is called meteor scatter communication.

Short Attention Span. Small, sand-grain sized meteoroids are entering the atmosphere constantly, essentially every few seconds in a given region, and thus ionization trails can be found in the upper atmosphere more or less continuously. Serial Attached SCSI, a serial communication protocol. Such ionization trails can last up to 45 minutes at a time. Second Avenue Subway, a new subway line in New York City. During the entry of a meteoroid into the upper atmosphere, an ionization trail is created, where the molecules in the upper atmosphere are ionized by the passage of the meteor. Schools Advisory Service. These particles might affect climate, both by scattering electromagnetic radiation and by catalyzing chemical reactions in the upper atmosphere.

The SAS System, software and programming language created by SAS Institute. Meteor dust particles left by falling meteoroids can persist in the atmosphere for up to several months. SAS strategic methodology. Molten terrestrial material "splashed" from such a crater can cool and solidify into an object known as a tektite. SAS (browser), a microbrowser. A meteor striking the Earth or other object may produce an impact crater. Southern All Stars, a Japanese rock band. If a meteoroid survives its transit of the atmosphere to come to rest on the surface, the resulting object is called a meteorite.

Scandinavian Airlines System. The meteor section of the British Astronomical Association on the other hand has a much stricter definition, requiring the meteor to be magnitude -5 or brighter. SAS Institute Inc., a software company. The International Meteor Organisation defines fireballs as being meteors of magnitude -3 or brighter. SAS (Hip-Hop Group), a member of The Diplomats. A very bright meteor may be called a fireball or bolide. SAS (company), a shoe company. Since the majority of meteors are from small sand-grain size meteoroid bodies, most visible signatures are caused by dexcitation following the individual collisions between vaporized meteor atoms and atmospheric constituents.

San Antonio Spurs, an NBA basketball team. For bodies with a size scale larger than the atmospheric mean free path (10 cm to several meters) the visibility is due to the heat produced by the ram pressure (not friction, as is commonly assumed) of atmospheric entry. Space Access Society. A meteor is the visible path of a meteoroid that enters the Earth's (or another body's) atmosphere, commonly called a shooting star or falling star. Society for Amateur Scientists, an American organisation. Slovak Academy of Sciences.

Singapore American School, an international school in Singapore. Shanghai American School, an international school in Shanghai. Semester at Sea, a shipboard academic program administered by the University of Pittsburgh. School for Advanced Studies.

Special Activities Staff, the CIA's paramilitary division. Australian Special Air Service Regiment, an Australian special forces unit. Special Air Service of New Zealand (NZ SAS), a New Zealand special forces unit. Special Air Service, the principal special forces organisation of the British Army.