obs

type DefaultObserver struct {
	gpsprot.DefaultHandler
}

type MultiObserver struct {
	*gpsprot.MultiHandler
}

type Observer interface {
	phcsync.Sampler
	gpsprot.MsgHandler

	// Tick delivers a filled TimeMsg (TAI+UTC populated, rounded to ms)
	// once per epoch, as soon as the first valid TimeMsg arrives.
	Tick(msg *gpsprot.TimeMsg, tRead time.Time)

	// NavEpochPV delivers the accumulated PVMsgBundle at each navigation epoch.
	// Relative order with respect to NavEpoch is undefined;
	// observers should use one or the other, not both.
	NavEpochPV(msg *gpsprot.NavEpochMsg, pv *gpsprot.PVMsgBundle, tRead time.Time)

	// ReopenLog handles log rotation (e.g., on SIGHUP signal)
	ReopenLog()

	// Release releases any resources used by the observer
	Release()
}