Broadcast satellite-clock polynomial.
af0, af1, and af2 are seconds, seconds per second, and seconds per second squared. toc_sow is seconds of the constellation week.
af0
af1
af2
toc_sow
@type t() :: %Sidereon.GNSS.Broadcast.ClockPolynomial{ af0: float(), af1: float(), af2: float(), toc_sow: float() }