Fade slope statistics for negative and positive slopes are presented w
hich are obtained by propagation measurements of the 40GHz beacon sign
al of the Italian satellite ITALSAT. Especially, the fade slope and th
e 3dB time duration introduced here are evaluated. Measured fade slope
s of up to 3.2dB/s were recorded. However, in 99.99% of the fading eve
nt time the fade slopes are < 1.9dB/s.