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The ionosphere is a region of the upper atmosphere, from about 80 km (50 miles) to 1000 km (600 miles) in altitude, where neutral air is ionized by solar photons, solar particles, and cosmic rays. When high-frequency signals enter the ionosphere at a low angle they are bent back towards the Earth by the ionized layer. [ 1 ]
Main gases of the ionosphere (about 50 km; 31 miand above on this chart) vary considerably by altitude. The F layer or region, also known as the Appleton–Barnett layer, extends from about 150 km (93 mi) to more than 500 km (310 mi) above the surface of Earth. It is the layer with the highest electron density, which implies signals penetrating ...
The BMW X5 M (F85) is a mid-size luxury SUV that is based on the BMW X5 (F15) which has been built by BMW since 2014. Unlike the BMW X5 M50d the X5 M is a full BMW M series car that has the M Powered engine. In comparison, the M50d is classified as an "M Performance Car" which means it isn't a full M car unlike the BMW M3 or the BMW M5.
Balloons cannot reach it because the air is too thin, but satellites cannot orbit there because the air is too thick. Hence, most experiments on the ionosphere give only small pieces of information. HAARP approaches the study of the ionosphere by following in the footsteps of an ionospheric heater called EISCAT near Tromsø, Norway. There ...
The BMW Concept X5 eDrive is a plug-in hybrid concept vehicle version of the X5 with kidney grille slats, air intake bars and the inlay in the rear bumper in the BMW i Blue colour; Silverflake metallic body colour, xDrive all-wheel-drive system, specially designed roof rails, a connector for the charging cable that lights up during charging, 21-inch light-alloy wheels in an exclusive ...
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The GOES spacecraft have carried an X-ray sensor (XRS) which measures the flux from the whole solar disk in two bands – 0.05 to 0.4 nm and 0.1 to 0.8 nm – since 1974, an X-ray imager (SXI) since 2004, a magnetometer which measures the distortions of the Earth's magnetic field due to space weather, a whole disk EUV sensor since 2004, and ...
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