decameter

WAVELENGTHS USED IN AMATEUR RADIO ASTRONOMY Decameter Meter Decimeter Centimeter Frequency 3-30 MHz 30-300 MHz 300-3,000 MHz 3-30 GHz Band HF VHF UHF SHF As a rule, the quiet Sun is loudest in the UHF and SHF bands, whereas the active Sun also radiates heavily in the HF and VHF bands.

A longtime rule of thumb of forecasters is that the 540 decameter thickness line marks the zone dividing rain to the south and snow and winter weather to the north.

I was slightly disappointed that there's no mention of the contributions that amateurs might make by observing Jupiter's decameter radio emissions using relatively simple and inexpensive equipment.

It's an easy system based on 10, like this: 10 millimeters=1 centimeter 10 centimeters=1 decimeter 10 decimeters=1 meter 10 meters=1 decameter 10 decameters=1 hectometer 10 hectometers=1 kilometer