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A wide variety of sources [5] [6] [7] define LEO in terms of altitude.The altitude of an object in an elliptic orbit can vary significantly along the orbit. Even for circular orbits, the altitude above ground can vary by as much as 30 km (19 mi) (especially for polar orbits) due to the oblateness of Earth's spheroid figure and local topography.
Increment 1 of the system was first fielded in March 2011 on the Reaper and could cover an area of 16 km 2 (6.2 sq mi); increment 2, incorporating ARGUS-IS and expanding the coverage area to 100 km 2 (39 sq mi), achieved initial operating capability (IOC) in early 2014. The system has 368 cameras capable of capturing five million pixels each to ...
Because war production deliveries could not be diverted, a special, rush order was placed with Curtiss in October, 1917, for six planes of unique design, with an empty weight of 500 lb (230 kg), top speed of 90 mph (140 km/h), range of 50 miles (80 km) and the capability of carrying up to 1,000 lb (450 kg) of explosives.
Under optimum conditions, the most intense thunderstorms can be seen at up to 100 miles (160 km) over flat terrain or water when the clouds are illuminated by large lightning discharges. However, an upper limit of 30–50 miles (48–80 km) is more common due to topography, trees on the horizon, low to mid-level clouds, and the fact that local ...
A long-range seismic sensor network was used during the Andean Seismic Project in Peru. A multi-hop span with a total length of 320 kilometres (200 miles) was crossed with some segments around 30 to 50 kilometers (19 to 31 miles). The goal was to connect to outlying stations to UCLA in order to receive seismic data in real time. [2]
The navies of Britain, Australia and the U.S. were able to control uncrewed ships in Australia while sitting more than 10,000 miles away in Portugal as part of a series of military experiments ...
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Archer Aviation Inc. is a publicly traded company headquartered in San Jose, California, which is developing eVTOL aircraft. [1] [2] [3]Its eVTOL aircraft is designed to allow airline operators to transport people in and around cities in an air taxi service and are claimed to have a range of up to 100 miles (160 km) at speeds of up to 150 miles per hour (240 km/h).