The Solar Radio Noise Monitor for broadband directly monitors solar flares by measuring the signal intensity of solar radio emissions at 500MHz -18GHz. It generally consists of two functions: one is absolute solar flux observation that measures the absolute values of solar flux, and the other is low frequency spectrum observation that measures the relative intensity of signals.
Absolute Solar Flux Observation
KSWC measures absolute intensity values of solar radio flux based on 20 frequencies at 0.5GHz -18GHz. KSWC assigns and transmits certain radio waves depending on communications frequencies’ specific required roles. As the intensity of these artificial signals is usually much stronger than the intensity of solar radio emission, communications are not affected. However, when solar flares occur, the solar radio emissions can be similar in intensity to the artificial signals, which in turn can cause problems in communications. Thus, in the event of solar flares, it is vital to promptly identify which frequency bands caused problems and establish countermeasures by monitoring the absolute values of solar radio intensity.
Compared to the fact that the absolute solar flux observation system used in countries such as the United States is operated by fixed frequencies, the system adopted in KSWC provides users with changeable frequencies. KSWC's system is more advanced because it remains constant, regardless of the variation in demand for frequency range owing to the continuous growth in telecommunications.
Low Frequency Spectrum Observation
The relative values of solar radio intensity are measured throughout the entire spectrum between 30MHz to 500MHz. Spectrum measurement of solar radio flux is one of the representative methods to monitor solar flares along with absolute solar flux observation. It enables prediction of types of solar flares and their possible future impact by monitoring the spectrum during solar flares.