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Pulsars are fast rotating neutron stars that emit electromagnetic radiation, which is received on earth as a series of very stable fast periodic pulses with periods in between 1.4 milliseconds and 8.5 seconds. These periodic pulses and the known positions (in celestial coordinates) of the neutron stars make them ideal beacons for navigation.Air traffic management and aircraft operations are curren ...

"The airport’s capacity is determined by the capacity of its runway system. The real capacity is usually lower than the declared capacity because of weather restrictions (cross- and tailwind and visibility) and because of dependencies between runways.Aircraft need to take off and land within defined cross- and tailwind limits. The direction of the runway determines the cross- and tailwind componen ...