What is the solar flux index?
Solar flux is measured in solar flux units (SFUs). It is the amount of radio noise or flux emitted at a frequency of 2800 MHz (10.7 cm, hence is it also called the 10.7 cm flux index).
What is 10.7 cm flux?
[9] A 10.7 cm solar flux measurement is a determination of the strength of solar radio emission in a 100 MHz-wide band centered on 2800 MHz (a wavelength of 10.7 cm), averaged over an hour. It is expressed in solar flux units (sfu), where 1 sfu = 10−22 W m−2 Hz−1.
What is the F10 7 index?
The F10. 7 index is a measure of the noise level generated by the sun at a wavelength of 10.7 cm at the earth’s orbit. The global daily value of this index is measured at local noon at the Dominion Radio Astrophysical Observatory (DRAO) in Penticton, Canada.
What is solar flux measured in?
watt per square metre
The solar irradiance is measured in watt per square metre (W/m2) in SI units. Solar irradiance is often integrated over a given time period in order to report the radiant energy emitted into the surrounding environment (joule per square metre, J/m2) during that time period.
What is AK index?
The K-index quantifies disturbances in the horizontal component of earth’s magnetic field with an integer in the range 0-9 with 1 being calm and 5 or more indicating a geomagnetic storm. It is derived from the maximum fluctuations of horizontal components observed on a magnetometer during a three-hour interval.
What is a index in ham radio?
Amateur Radio operators should be very lucky to encounter such conditions even once in their lifetime. The A Index: It’s simply an index of geomagnetic activity derived from a scaled average of the previous 24 hours K-index readings. Your should use this as a reference for general conditions on the bands.
What is planetary A index?
A index. The A-index is calculated for individual magnetometer stations. The value is calculated as the average of eight, three-hourly station ak-indices observed during a UT day, and provides a single, average value to indicate the activity level for that day.
What is KP value?
The Kp-index describes the disturbance of the Earth’s magnetic field caused by the solar wind. The faster the solar wind blows, the greater the turbulence. The index ranges from 0, for low activity, to 9, which means that an intense geomagnetic storm is under way.
What is planetary index?
The planetary Kp-index is a globally averaged indicator of the worldwide level of geomagnetic activity. The official Kp index is derived by calculating a weighted average of K-indices from a predetermined network of geomagnetic observatories, the official Kp network.
What does the solar flux index mean in radio?
– Heartland Hams Amateur Radio Club What Does the Solar Flux Index Mean? Solar flux is measured in solar flux units (SFUs). It is the amount of radio noise or flux emitted at a frequency of 2800 MHz (10.7 cm, hence is it also called the 10.7 cm flux index ).
How is the flux of the solar cycle measured?
Solar flux is measured in solar flux units (SFUs). It is the amount of radio noise or flux emitted at a frequency of 2800 MHz (10.7 cm, hence is it also called the 10.7 cm flux index ). When talking about the solar cycle the numbers are based on ‘smoothed’ numbers, this means the monthly average rather than the figures for each day.
What does the 10.7 cm flux index mean?
What Does the Solar Flux Index Mean? Solar flux is measured in solar flux units (SFUs). It is the amount of radio noise or flux emitted at a frequency of 2800 MHz (10.7 cm, hence is it also called the 10.7 cm flux index ).
How often does NOAA update the solar flux?
This chart is based on the NOAA Geophysical Alert Message (updated every three hours). Included are the Solar Flux, K-Index, and A-Index numbers for the past six months.