Bottom · Main · Solar Activity · MeteorScatter · Software · Hardware · DXpeditions · HSMS · Weather WSJT · MeteorScatter Sound · Aurora · VHF Links · InfoPages · eMail Europe · eMail NorthAmerica The Leonids Meteor Shower   ·   Monitor Table of major annual meteor showers   ·   Table of elevation/offset angles

The offset angles come from the fact that most meteor reflections will not come from meteors directly between the transmitter and receiver, but instead tend to most frequently come from two "hot spot" regions about 50-150km to either side of the transmitter-receiver great circle path midpoint. The offset angles are approximate angles which the antenna should be pointed to either left or right away from the direct bearing of the other station. For small antennas and distances over about 1200km, these are not important. For large arrays at shorter distances, and for all but the smallest antennas at distances less than about 800km, these can become very important. For sporadic meteors, an azimuth on either side of the direct path can be used; but both stations must offset in the same direction! For more information, see • OH5IY's meteorscatter website • "VHF Propagation by Meteor-Trail Ionization"     by W4LTU (reprinted in Beyond Line of Sight, ARRL, p. 115), • The VHF/UHF DX Book p. 2-58 from RSGB, • and the various professional literature.

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