This track contains isochronic tones beating at 7.83Hz in Alpha, which is a frequency also known as Schumann Resonance. There are no ramps in the frequency, it's just a straight 7.83Hz beat all the way through the whole hour track.
I've also embedded amplitude entrainment effects into the Space Travel soundtrack. This creates small distortions in the music which vibrate subtly to the same 7.83Hz frequency. Adding to the overall brainwave entrainment effect and experience.