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- Project_Mogul abstract "Project Mogul (sometimes referred to as Operation Mogul) was a top secret project by the US Army Air Forces involving microphones flown on high altitude balloons, whose primary purpose was long-distance detection of sound waves generated by Soviet atomic bomb tests. The project was carried out from 1947 until early 1949. The project was moderately successful, but was very expensive and was superseded by a network of seismic detectors and air sampling for fallout, which were cheaper, more reliable, and easier to deploy and operate.Project Mogul was conceived by Dr. Maurice Ewing who had earlier researched the deep sound channel in the oceans and theorized that a similar sound channel existed in the upper atmosphere: a certain height where the air pressure and temperature result in minimal speed of sound, so that sound waves would propagate and stay in that channel due to refraction. The project involved arrays of balloons carrying disc microphones and radio transmitters to relay the signals to the ground. It was supervised by Dr. James Peoples, who was assisted by Dr. Albert P. Crary.One of the requirements of the balloons was that they maintain a relatively constant altitude over a prolonged period of time. (See aerostat.) Thus instrumentation had to be developed to maintain such constant altitudes, such as pressure sensors controlling the release of ballast.The early Mogul balloons consisted of large clusters of rubber meteorological balloons, however, these were quickly replaced by enormous balloons made of polyethylene plastic. These were more durable, leaked less helium, and also were better at maintaining a constant altitude than the early rubber balloons. Constant altitude control and polyethylene balloons were the two major innovations of Project Mogul.Project Mogul was the forerunner of the Skyhook balloon program, which started in the late 1940s, as well as two other espionage programs involving overflights and photographic surveillance of the Soviet Union in the mid-1950s, Project Moby Dick and Project Genetrix. The spy balloon overflights raised storms of protest from the Soviets. The constant-altitude balloons also were used for scientific purposes such as cosmic ray experiments.Echoes of Mogul's experimental infrasound detection of nuclear tests exist today in ground-based detectors, part of so-called Geophysical MASINT (Measurement And Signal INTelligence). In 2013, this world-wide network of sound detectors picked up the large explosion of the Chelyabinsk meteor in Russia (see Chelyabinsk article for details). The strength of the sound waves was used to estimate the size of the explosion.".
- Project_Mogul thumbnail Roswellmogulmap.png?width=300.
- Project_Mogul wikiPageExternalLink 3704-charles-b-moore-1920-2010.
- Project_Mogul wikiPageExternalLink watch?v=EuhccACOd1U.
- Project_Mogul wikiPageID "43086".
- Project_Mogul wikiPageRevisionID "596891321".
- Project_Mogul hasPhotoCollection Project_Mogul.
- Project_Mogul subject Category:Balloons_(aircraft).
- Project_Mogul subject Category:Cold_War_military_history_of_the_United_States.
- Project_Mogul subject Category:Military_projects.
- Project_Mogul subject Category:Projects_of_the_United_States_Air_Force.
- Project_Mogul subject Category:Roswell_UFO_incident.
- Project_Mogul subject Category:Soviet_Union–United_States_relations.
- Project_Mogul type Abstraction100002137.
- Project_Mogul type Act100030358.
- Project_Mogul type Activity100407535.
- Project_Mogul type Event100029378.
- Project_Mogul type MilitaryProjects.
- Project_Mogul type ProjectsOfTheUnitedStatesAirForce.
- Project_Mogul type PsychologicalFeature100023100.
- Project_Mogul type Undertaking100795720.
- Project_Mogul type Work100575741.
- Project_Mogul type YagoPermanentlyLocatedEntity.
- Project_Mogul comment "Project Mogul (sometimes referred to as Operation Mogul) was a top secret project by the US Army Air Forces involving microphones flown on high altitude balloons, whose primary purpose was long-distance detection of sound waves generated by Soviet atomic bomb tests. The project was carried out from 1947 until early 1949.".
- Project_Mogul label "Progetto Mogul".
- Project_Mogul label "Project Mogul".
- Project_Mogul label "Projet Mogul".
- Project_Mogul label "Projeto Mogul".
- Project_Mogul label "Proyecto Mogul".
- Project_Mogul label "モーグル計画".
- Project_Mogul sameAs Projekt_Mogul.
- Project_Mogul sameAs Proyecto_Mogul.
- Project_Mogul sameAs Projet_Mogul.
- Project_Mogul sameAs Progetto_Mogul.
- Project_Mogul sameAs モーグル計画.
- Project_Mogul sameAs Projeto_Mogul.
- Project_Mogul sameAs m.0btqx.
- Project_Mogul sameAs Q2414613.
- Project_Mogul sameAs Q2414613.
- Project_Mogul sameAs Project_Mogul.
- Project_Mogul wasDerivedFrom Project_Mogul?oldid=596891321.
- Project_Mogul depiction Roswellmogulmap.png.
- Project_Mogul isPrimaryTopicOf Project_Mogul.