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.
This allows fish arches and fine detail to be shown. Frequency Most Lowrance sonar units today operate at 192 or 200 kHz (kilohertz), with a few using 50 kHz. There are advantages to each frequency, but for almost all freshwater applications and most saltwater applications, 192 or 200 kHz is the best choice.he frequencies most often used by Lowrance in our sonar are 192 - 200 kHz (kilohertz); we also make some units that use 50 kHz. Although these frequencies are in the sound spectrum, theyâre inaudible to both humans and fish.