The skip zone does not exist if the fof2 value is larger than the frequency. The estimated skip zone will be calculated.
The following will calculate the skip zone around a transmitter qth.
Hf skip zone calculator. The hf bands for hf newcomers 4 the skip zone or blind zone another point worth noting is something called the skip zone. Find the fof2 and hmf2 graph closest to your location and enter in the current values the end of the blue trace along with the transmitter frequency. Skip zone and skip distance under certain critical propagation con ditions there is a distance between the limits of ground wave and the beginning of skywave refracted to earth respective to the transmitter earth fig.
The outer limit of the skip zone varies considerably depending on the operating frequency the time of day the season of the year sunspot activity and the direction of transmission. The term skip has been misused so much that some folks are beginning to call this the. Ray diagram showing three hops from one ray.
Skip distance skip zone in figure 2 19 note the relationship between the sky wave skip distance the skip zone and the ground wave coverage. Is first returned to earth. The zone is located between regions covered by the ground wave and where the sky wave first returns to earth.
The zone is located between regions both closer and farther from the transmitter where reception is possible. The skip distance is the distance from the transmitter to the point where the sky wave is first returned to earth. The skip zone or silent zone is a region where a radio transmission can not be received.
Hf propagation frequency. The higher skip zones may have stronger signals than the first skip zone because rays at different transmission angles tend to spread out and fill in these gaps not shown. A skip zone also called a silent zone or zone of silence is a region where a radio transmission can not be received.
Skywaves skip zone and skip distances are three key concepts show why radio communications signals are heard in some places and not others. Skip zone the skip zone is a zone of silence between the point where the ground wave is too weak for reception and the point where the sky wave is first returned to earth. Skywaves the skywave refers to the signal that travels away from the earth s surface towards the ionosphere.