  To maximize file transfer from space vehicles to the Earth, we propose a new
space-to-earth content transfer protocol that combines turbo codes, RaptorQ
codes, real-time channel prediction, and dynamic code-rate selection. The
protocol features a practical signal-to-noise ratio prediction model that
facilitates periodic adjustment of the turbo encoder to achieve adaptive rate
transmission. Our simulation results indicate that an increase of about 20% in
file transfer rate is achievable using the proposed protocol.
