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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 Philippine Sea is a marginal sea of the Western Pacific Ocean east of the Philippine Archipelago (hence the name) and the largest sea in the world, occupying an estimated surface area of 5 million square kilometers (2 × 10 ^ 6 sq mi). [1] The Philippine Sea Plate forms the floor of the sea. [2]
The Philippines is an archipelago that comprises 7,641 islands, [8] and with a total land area of 300,000 square kilometers (115,831 sq mi), it is the world's fifth largest island country.
The F region of the ionosphere is home to the F layer of ionization, also called the Appleton–Barnett layer, after the English physicist Edward Appleton and New Zealand physicist and meteorologist Miles Barnett. As with other ionospheric sectors, 'layer' implies a concentration of plasma, while 'region' is the volume that contains the said layer.
Map showing the approximate area corresponding to the official extent of the West Philippine Sea. Also included is the international treaty limits (red line as per the 1898 Treaty of Paris) and the Spratly Islands which is often designated as the Kalayaan Island Group in Philippine maps (green line as per Presidential Decree No. 1596 of 1978 [1]) .
The following outline is provided as an overview of and topical guide to the Philippines: Philippines – archipelagic country in Southeast Asia. In the western Pacific Ocean, it consists of 7,641 islands which are broadly categorized in three main geographical divisions from north to south: Luzon, Visayas, and Mindanao.
SpaceX’s rocket explosion in November 2023 created a massive hole in the Earth's ionosphere, providing scientists with a rare opportunity to study its effects.
Here R is the mean Earth radius, H is the mean height of the ionosphere shell. The IPP or Ionospheric Pierce Point is the altitude in the ionosphere where electron density is greatest. [1] These points can change based on factors like time of day, solar activity, and geographical location, which all influence ionospheric conditions. [2]