John,
Galileo is circularly polarized, so using the opposite polarization sense will help.
An excellent paper on Galileo interference was written by Peter Blair, G3LTF, a well known moonbounce authority and outstanding engineer. The paper can be found following this link:
http://www.southgatearc.org/articles/galileo.htm
73, Marc N2UO
--- "John B. Stephensen" [email protected] wrote:
Unfortunately, the Gaileo downlink covers 1258-1299 MHz, the first satellite has been lanched and the satellites in the constellation will be on over the entire world. Our uplink antennas have sidelobes that are 10-20 dB down, so a 1 kW EIRP SSB uplink results in 10-100 W radiated towards terrestrial receivers. A 256 kbps uplink would require 16 kW EIRP and be 0.5-1 MHz wide.
P3E has a second L receiver tuned to a null in the Galileo signal (there is only one null in the 1260-1270 MHz band) but no one knows if this will help. SSB users can move to the U uplink if L is a problem. However, this only works for narrowband signals. A wideband uplink won't fit in the null and can't move down in frequency.
73,
John KD6OZH
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