/// <summary>
/// 过滤掉小历元时段，在缓存中操作，确保缓存大于断裂数量
/// </summary>
/// <param name="info"></param>
private void CheckAndFiltSmallSpan(RinexEpochObservation info)
{
//添加
foreach (var sat in info)
{
WindowDataManager.GetOrCreate(sat.Prn).Add(info.ReceiverTime);
}
////保证有足够的数量
//if (!WindowDataManager.HasFull) { return; }
JudgeAndFiltSmallSpanInBuffer(info.ReceiverTime, info.ReceiverTime == LastEpoch);
}
/// <summary>
/// 判断过滤
/// </summary>
/// <param name="currentTime"></param>
/// <param name="isLastEpoch"></param>
private void JudgeAndFiltSmallSpanInBuffer(Time currentTime, bool isLastEpoch)
{
if (this.Inverval == 0 || this.Inverval == Double.MaxValue)
{
this.Inverval = GetInteval(this.Buffers);
}
//执行判断,并移除历元卫星
foreach (var prn in WindowDataManager.Keys)
{
var window = WindowDataManager.Get(prn);
if (window.Count == 0)
{
continue;
}
//当前与上一个在指定历元内，且非最后，即后续还有数据需要添加后再判断，这样可以节约大量时间
var lastSan = Math.Abs(currentTime - window.Last);
if (lastSan < MinBreakTimeSpan && !isLastEpoch)
{
continue;
}
//按照允许的最大间隔分离
var gapedWindows = window.Split((prev, current) => { return(Math.Abs(current - prev) > MinBreakTimeSpan); });
int subCount = 0;
foreach (var subWindow in gapedWindows)
{
subCount++;
if (subWindow.Count == 0)
{
continue;
}
//包括当前，且非最后，即后续还有数据需要添加后再判断
if (subWindow.Contains(currentTime) && !isLastEpoch)
{
continue;
}
//没有包括当前，但是窗口最后一个历元与当前不超过指定的阈值，且非最后历元，则直接继续，需要添加后判断
lastSan = Math.Abs(currentTime - subWindow.Last);
if (!subWindow.Contains(currentTime) && lastSan < MinBreakTimeSpan && !isLastEpoch)
{
continue;
}
//-----------以下数据进行判断长度并删除过短的数据-----------
//小于指定的数量
if (subWindow.Count < MinEpochCount && this.Buffers != null)
{
log.Debug(prn + " 第 " + subCount + "/" + gapedWindows.Count + " 段 " + "，在缓存中移除时段 " + subWindow.ToString() + ", 当前： " + currentTime + ", 与最后差(s)：" + lastSan + ", 是否最后历元：" + isLastEpoch);
int i = 0;
foreach (var epoch in this.Buffers)
{
if (epoch.Contains(prn) && window.Contains(epoch.ReceiverTime))
{
epoch.Remove(prn);
i++;
}
}
//处理最后一个历元
if (isLastEpoch)
{
var epo = Current;
if (epo.Contains(prn) && window.Contains(epo.ReceiverTime))
{
epo.Remove(prn);
i++;
}
}
if (i > 0)
{
log.Debug(prn + " 移除了 " + i + " 个");
}
}
//除了当前历元（已跳过continue），判断一次后清空过期的数据窗口，第二段重新积累，历史车轮滚滚向前
window.Remove(subWindow);
}
}
}
