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Home dx @en TO2TT Mayotte dxpedition World Wide propagation predictions

TO2TT Mayotte dxpedition World Wide propagation predictions

Published on 2 October 2013, by in dx.
On the eve of the DXpedition TO2TT by Italian Dxpedition Team, here ready the propagation tables for radio links Mayotte Island – Rest of the World, edited by IK7JWY and IZ5CML for webcommunity Hamradioweb. The parameters considered for the preparation of the tables are:
Solar Flux Index = 105 sfu
K = 2

In fact, currently we have disturbed geomagnetic conditions (K = 6) following the eruption of a magnetic filament on the Sun on the evening of 29 September. The following is a link to a video of the eruption:

http://www.spaceweather.com/images20…g7ohmab0j6tms3

The above eruption as well as throw into space nearly relativistic-speed protons caused a coronal mass ejection (CME) not exactly Earth-directed but came to us in the early hours of the morning today, ahead of schedule. Because of the interaction with the Earth’s magnetic field, the geomagnetic index k has jumped to 6. The effects of this interaction on HF ionospheric propagation may last a few days. Let us say, then, that in the early days of the DXpedition, will not return until the conditions geomagnetic quiet, the tables provide optimistic results than the reality, especially for the routes that pass near the poles.
If the geomagnetic conditions would persist for longer perturbed, we will update the tables.

Using Tables
Locate the route and the band (or time) of interest, there are two parameters that help us to understand which is the time (or band) better: the intensity of the signal (color from yellow to red) and the availability of the signal (color from light gray to blue). The ideal condition is for the intensity red and blue for availability. Click on the charts to enlarge them.

W3

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W3/LP

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W6

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W6/LP

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KP4

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LU

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PY

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ZS

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ITALY

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DL

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UA1

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VU

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UA9

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JA

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VK4

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VK4/LP

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ZL

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ZL/LP

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This post is also available in: Italian