spp

type Output struct {
	Result string // Assuming this is what you mean to capture
}

type SPP struct {
	InputChan       <-chan interface{}
	OutputChan      chan<- interface{}
	EpochBuffer     []observation.Epoch
	EphemerisBuffer []ephemeris.Ephemeris
}

type Satellite struct {
	Position [3]float64 // Satellite position in ECEF coordinates (x, y, z)
	Time     float64    // Signal travel time from satellite to receiver
}