/// <summary>
/// 设置值
/// </summary>
public void InitSelector(Time from, List <SatelliteNumber> exceptPrns = null)
{
this.PeriodSats = new Dictionary <BufferedTimePeriod, SatelliteNumber>();
//选星策略：选择时段最长的星，以此类推
var nextStart = from;
var end = SatVisiblePeriodMarker.TimePeriod.End;
while (nextStart < end)
{
List <SatPeriod> satPeriods = SatVisiblePeriodMarker.GetSortedSatPeriods(nextStart);
if (satPeriods.Count == 0) //没有搜索到区域，则添加时间继续搜索
{
nextStart = nextStart + 60.0; //添加 1 分钟
}
else
{
List <SatPeriodWeight> sats = new List <SatPeriodWeight>();
foreach (var period in satPeriods)
{
int count = 0;
for (var i = period.TimePeriod.Start; i < period.TimePeriod.End; i += SatCycleSlipMaker.Interval)
{
if (SatCycleSlipMaker.Contains(period.Prn, i))
{
count++;
}
}
sats.Add(new SatPeriodWeight(period.Prn, period.TimePeriod, count));
}
sats.Sort();
sats.Reverse();
var best = sats[0];
if (exceptPrns != null)
{
foreach (var item in sats)
{
if (!exceptPrns.Contains(item.Prn))
{
best = item;
}
}
}
//添加一个最好的。
PeriodSats.Add(best.TimePeriod, best.Prn);
//下一段
nextStart = best.TimePeriod.End;
}
}
}
/// <summary>
/// 从当前时间选择最优的卫星序列,越往前越优。
/// </summary>
/// <param name="from">时间</param>
/// <returns></returns>
public List <SatPeriodWeight> GetSortedSatPeriods(Time from)
{
//选星策略：选择时段最长的星，以此类推
var nextStart = from;
List <SatPeriod> satPeriods = null;
while (nextStart < SatVisiblePeriodMarker.TimePeriod.End)
{
satPeriods = SatVisiblePeriodMarker.GetSortedSatPeriods(nextStart);
if (satPeriods.Count == 0) //没有搜索到区域，则添加时间继续搜索,指导结束
{
nextStart = nextStart + 60.0; //添加 1 分钟
}
else
{
break;
}
}
List <SatPeriodWeight> sats = new List <SatPeriodWeight>();
foreach (var period in satPeriods)
{
int count = 0;
for (var i = period.TimePeriod.Start; i < period.TimePeriod.End; i += SatCycleSlipMaker.Interval)
{
if (SatCycleSlipMaker.Contains(period.Prn, i))
{
count++;
}
}
sats.Add(new SatPeriodWeight(period.Prn, period.TimePeriod, count));
}
sats.Sort();
sats.Reverse();
return(sats);
}
