CT2JKO and OMAC - Ham Radio and Local Weather

Seja benvindo ao meu website, que tem duas zonas distintas, uma dedicada ao radioamadorismo e outra à meteorologia.

Welcome to my website, which has two sections: one about ham radio and the other about weather.

Informações meteorológicas/Weather:

Automatically updated every 5 minutes. For more frequent updates, use this button:

Vista do Planeta Terra (Earth View) - (http://www.fourmilab.ch/cgi-bin/Earth) :

Condições Ionosféricas (Ionospheric Conditions) - (http://www.ips.gov.au/HF_Systems):

This image shows the DIFFERENCE between current OBSERVED HOURLY conditions and PREDICTED MONTHLY conditions for the region. The colours blue, green, yellow, red, correspond to "enhanced", "normal", "mildly depressed" and "depressed" conditions respectively. Depressions and enhancements are with respect to the IPS predicted monthly T index for that month.

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Mapas Ionosféricos (Ionospheric Maps) - (http://www.ips.gov.au/HF_Systems):

A feature of the ionosphere is its ability to reflect radio waves. However, only radio waves within a certain frequency range will be reflected and this range varies with a number of factors.

The most widely used instrument for ionospheric measurement is the ionosonde. The ionosonde is essentially a high frequency radar which sends short pulses of radio energy into the ionosphere. If the radio frequency is not too high, the pulses are reflected back to earth.

The ionosonde records the time delay between transmission and reception of the pulses. By varying the frequency of the pulses (typically 1-22MHz), a record is obtained of the time delay at different frequencies. This record is referred to as an ionogram.

The highest frequency which the ionosphere will reflect vertically is called foF2. These foF2 measurements from various sites can be used to create a map of foF2.