The red banner of the communists, the black-white-red of the Second Reich, and the new swastika flag of the Nazis all contended for allegiance. From 1933 to 1945 the Nazi symbols were dominant. The Federal Republic of Germany (West Germany) restored the old black-red-yellow flag on May 9, 1949, and the government made use of a similar flag with the eagle shield in the centre.
S band radars operate on a wavelength of 8-15 cm and a frequency of 2-4 GHz. Because of the wavelength and frequency, S band radars are not easily attenuated. This makes them useful for near and far range weather observation. The National Weather Service (NWS) uses S band radars on a wavelength of just over 10 cm. The drawback to this band of radar is that it requires a large antenna dish and a large motor to power it. It is not uncommon for a S band dish to exceed 25 feet in size. C band radars operate on a wavelength of 4-8 cm and a frequency of 4-8 GHz.
Northeast Regional Weather Radar. About Weather Radar. Radar is an acronym that stands for RAdio Detection And Ranging. A weather radar consists of a parabolic dish (it looks like a satellite dish) encased in a protective dome and mounted on a tower of up to five stories tall. About 150 NEXRAD (NEXt generation of weather RADar) Doppler radars were installed throughout the U.S. in the 1990s. The radar itself does not delineate between rain and snow but AccuWeather's proprietary algorithms do, based on atmospheric conditions.