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To provide high data rate aerial links for 5G and beyond wireless networks,the integration of free-space optical (FSO) communications and aerial platformshas been recently suggested as a practical solution. To fully reap the benefitof aerial-based FSO systems, in this paper, an analytical channel model for along-range ground-to-air FSO link under the assumption of plane wave opticalbeam profile at the receiver is derived. Particularly, the model includes thecombined effects of transmitter divergence angle, random wobbling of thereceiver, jitter due to beam wander, attenuation loss, and atmosphericturbulence. Furthermore, a closed-form expression for the outage probability ofthe considered link is derived which makes it possible to evaluate theperformance of such systems. Numerical results are then provided to corroboratethe accuracy of the proposed analytical expressions and to prove thesuperiority of the proposed channel model over the previous models inlong-range aerial FSO links.

Statistical Channel Modeling for Long-Range Ground-to-Air FSO Links