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  2. Ionosphere - Wikipedia

    en.wikipedia.org/wiki/Ionosphere

    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 ...

  3. BMW X5 - Wikipedia

    en.wikipedia.org/wiki/BMW_X5

    The BMW X5 is a mid-size luxury crossover SUV produced by BMW. [1] The X5 made its debut in 1999 as the E53 model. It was BMW's first SUV. At launch, it featured all-wheel drive and was available with either a manual or automatic gearbox. The second generation was launched in 2006, and was known internally as the E70.

  4. High-frequency Active Auroral Research Program - Wikipedia

    en.wikipedia.org/wiki/High-frequency_Active...

    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 ...

  5. Skywave - Wikipedia

    en.wikipedia.org/wiki/Skywave

    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 ]

  6. BMW X5 (G05) - Wikipedia

    en.wikipedia.org/wiki/BMW_X5_(G05)

    The G05 BMW X5 is a mid-size luxury SUV produced by German automaker BMW. It is the fourth and current generation of the BMW X5. It was launched in 2018 as the successor to the F15 X5. [11] Sales of the X5 started in November 2018. [12] The X5 M and X5 M Competition (F95) performance models were revealed on 1 October 2019. [13]

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  8. Atmospheric electricity - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_electricity

    The movement of charge between the Earth's surface, the atmosphere, and the ionosphere is known as the global atmospheric electrical circuit. Atmospheric electricity is an interdisciplinary topic with a long history, involving concepts from electrostatics , atmospheric physics , meteorology and Earth science .

  9. BMW X5 (F15) - Wikipedia

    en.wikipedia.org/wiki/BMW_X5_(F15)

    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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