DifferentFrequencies-NPS

Forfatter/Opretter:

Naval Postgraduate School

Kredit:

http://www.weather.nps.navy.mil/~psguest/EMEO_online/module3/module_3_2b.html

Shortlink:

https://dkwiki.dk/b/22f34

kilde:

Wikimedia Commons

størrelse:

400 x 200 Pixel (14104 Bytes)

beskrivelse:

Ray diagram showing the effect of using different frequencies at the same transmission angle. The blue ray frequency is greater than the MUF and passes into space. The green ray frequency is less than the MUF but greater than the E layer MUF. This is usually the best frequency region to use for long range communications and is usually where the FOT (equal to 0.85 x MUF) exists. The orange ray frequency is less than the E layer MUF and greater than the LUF. This is best for medium range (around 500 to 1500 km) transmissions. The red ray is less than the LUF and is absorbed in the D layer.

Licens:

Public domain

Kommentar på licensen:

http://www.nps.navy.mil/NPS/Disclaimers.htm