Written by Siemens Siemens Siemens Thursday, March 24, 2011
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Saturn radio astronomers baffled
Written by Siemens Siemens Siemens
Written by Siemens Siemens Siemens Original article published on March 23, 2011 on the web
SPACE.com The NASA Cassini spacecraft recently found that the radio wave signals from natural the giant planet, they differ in the northern and southern hemispheres, a division that may affect how scientists measure the length of the Saturn day. But the oddities do not end here, say the researchers. variations in the signal - which are controlled by the rotation of the planet - also change dramatically over time, seemingly in sync with the seasons of Saturn.
more strange SPACE.com The NASA Cassini spacecraft recently found that the radio wave signals from natural the giant planet, they differ in the northern and southern hemispheres, a division that may affect how scientists measure the length of the Saturn day. But the oddities do not end here, say the researchers. variations in the signal - which are controlled by the rotation of the planet - also change dramatically over time, seemingly in sync with the seasons of Saturn.
Cassini scientists have made emissions radio waves from Saturn variants to human audio range. 
Observations of this type of wave patterns in Jupiter allowed scientists to measure the rate of rotation of the planet, but Saturn, the situation has proved much more complex, researchers say.
Observations of this type of wave patterns in Jupiter allowed scientists to measure the rate of rotation of the planet, but Saturn, the situation has proved much more complex, researchers say. When NASA's Voyager spacecraft visited Saturn in the early 1980's, SKR emissions of the planet indicated that the duration of the day on Saturn was about 10.66 hours. But later, another ship - including the Ulysses and Cassini probes NASA-European Space Agency - found that radio outbursts varied-from seconds to minutes. 
Other comments Cassini SKR showed that emissions were not even a single. They are actually a duo - but the two "singers" in the world are out of sync. radio waves emanating from the north pole of Saturn has a period of about 10.6 hours, while those from the south pole is repeated every 10.8 hours, the researchers say.
In December, Gurnett and his team published an article using data from Cassini to show that the northern and southern SKR periods were exchanged in March 2010. That is, the period decreased steadily south and north is increased, with the two converging at around 10.67 hours in March. 
This happened seven months after the spring equinox on Saturn in August 2009, when the sun shone directly on Ecuador in the world. From the junction, the pattern has continued, with the SKR emission period of South decremented and the northern rising, researchers say. Review
Saturn signals
View strange radio waves crossing took Cassini scientists to review the previous observations Cassini visits. Found similar patterns in the Voyager data of 1980, and Ulysses observations taken between 1993 and 2000. In both cases, variations in the radio broadcast differed from one hemisphere to another. And in both cases, the strange behavior of radio waves came less than a year of the Saturn equinox, the researchers say.
But what is happening? Cassini scientists believe that differences in periods of radio waves have to do with the hemispheres of Saturn rotate at different rates in reality. The probably the signal changes are caused by variations in high-altitude winds in the Northern and Southern Hemispheres, say researchers. The behavior of Saturn's magnetosphere - the magnetic bubble surrounding around the globe - is also likely to be having an impact, he adds. In a separate study, researchers used Hubble Space Telescope observations by NASA to find auroras in the north and south - light shows caused by the solar wind interaction with Saturn's magnetic field - swinging up and down in latitude in a pattern that matched SKR variations, researchers say. And another study showed that Saturn's magnetic field above the planet's poles varied in time with the aurora and radio wave emissions.
"The rain of electrons in the atmosphere produces auroras also produces radio and affects the magnetic field, so scientists believe that all these changes we see are related to the changing influence of the Sun on the planet, "says Stanley Cowley of Leicester University, Scientific Cassini and co-author of two recent articles on Saturn's magnetic field. The NASA Cassini spacecraft was launched in 1996 and reached Saturn in 2004. It also carries the Huygens lander of the European Space Agency, which landed on Titan, Saturn's moon, soon after his arrival at the ringed planet's orbit. The ship completed its mission primary explore Saturn, its rings and moons in 2008. Since then, the Cassini mission to Saturn has been extended twice, most recently until 2017.
Original Date: March 23, 2011 Original Link
SOURCE http://www.cienciakanija.com/2011/03/24/extranas-senales- de-radio-on-Saturn-embarrassed-to-the-astronomers /
Siemens Siemens Siemens Science
This happened seven months after the spring equinox on Saturn in August 2009, when the sun shone directly on Ecuador in the world. From the junction, the pattern has continued, with the SKR emission period of South decremented and the northern rising, researchers say. Review Saturn signals
View strange radio waves crossing took Cassini scientists to review the previous observations Cassini visits. Found similar patterns in the Voyager data of 1980, and Ulysses observations taken between 1993 and 2000. In both cases, variations in the radio broadcast differed from one hemisphere to another. And in both cases, the strange behavior of radio waves came less than a year of the Saturn equinox, the researchers say.
But what is happening? Cassini scientists believe that differences in periods of radio waves have to do with the hemispheres of Saturn rotate at different rates in reality. The probably the signal changes are caused by variations in high-altitude winds in the Northern and Southern Hemispheres, say researchers. The behavior of Saturn's magnetosphere - the magnetic bubble surrounding around the globe - is also likely to be having an impact, he adds. In a separate study, researchers used Hubble Space Telescope observations by NASA to find auroras in the north and south - light shows caused by the solar wind interaction with Saturn's magnetic field - swinging up and down in latitude in a pattern that matched SKR variations, researchers say. And another study showed that Saturn's magnetic field above the planet's poles varied in time with the aurora and radio wave emissions.
"The rain of electrons in the atmosphere produces auroras also produces radio and affects the magnetic field, so scientists believe that all these changes we see are related to the changing influence of the Sun on the planet, "says Stanley Cowley of Leicester University, Scientific Cassini and co-author of two recent articles on Saturn's magnetic field. The NASA Cassini spacecraft was launched in 1996 and reached Saturn in 2004. It also carries the Huygens lander of the European Space Agency, which landed on Titan, Saturn's moon, soon after his arrival at the ringed planet's orbit. The ship completed its mission primary explore Saturn, its rings and moons in 2008. Since then, the Cassini mission to Saturn has been extended twice, most recently until 2017.
Original Date: March 23, 2011 Original Link
SOURCE http://www.cienciakanija.com/2011/03/24/extranas-senales- de-radio-on-Saturn-embarrassed-to-the-astronomers /
Siemens Siemens Siemens Science
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