public void Start()
{
_readSubscription = _dataPortal.Messages
.SelectMany(dataFrame => _dataFrameProcessor.GetHoldStates(dataFrame))
.Do(state => _climbingHoldStateSubject.OnNext(state))
.ObserveOn(_schedulerProvider.Default)
.SubscribeOn(_schedulerProvider.Default)
.Subscribe();
_dataPortal.Start();
}