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Doppler Effect: f=f0*(c+v1)/(c+v2) where
- f is the observed frequency
- f0 is the emitted frequency
- v1 is the velocity of the receiver relative to the medium; positive if the receiver is moving towards the source
- v2 is the velocity of the source relative to the medium; positive if the source is moving away from the receiver
- c is the velocity of waves in the medium
So, Tagg! You'll be starting off in the middle of that flat area with a decent amount of packed snow under your feet. Start by spraying a Scald up into the air so it falls around yourself like pretty, boiling hot rain. Maybe throw a spotlight in there somewhere so the light catches the drops of water and makes them sparkle lightly? The goal is to melt a large-ish circle in the snow around you.The diameter of a circle is the same no matter which point it is drawn from.