/// <summary>
/// 获取服务，根据设置自动判断。
/// </summary>
/// <returns></returns>
public override IEphemerisService GetService()
{
//检查当前，避免重复加载
if (IsCurrentEphemerisServiceAvailable())
{
log.Info("返回已有星历服务 " + CurrentService);
return(CurrentService);
}
if (ProcessOption.IsUseUniqueEphemerisFile)
{
this.CurrentService = EphemerisDataSourceFactory.Create(ProcessOption.EphemerisFilePath);
log.Info("成功载入选项指定星历文件: " + ProcessOption.EphemerisFilePath);
return(CurrentService);
}
if (ProcessOption.IsIndicatedEphemerisPathes) //优先指定的星历文件
{
var ephePathes = ProcessOption.GetIndicatedEphemerisPathes();
this.CurrentService = new IndicatedEphemerisService(ephePathes, ProcessOption, DataSourceOption.GetIgsProductSourceOption(CurrentSession));
//EphemerisDataSourceFactory.Create(ProcessOption.EphemerisFilePath);
StringBuilder sb = new StringBuilder();
foreach (var item in ephePathes)
{
sb.AppendLine(item.Key + ":" + item.Value);
}
log.Info("成功载入选项指定星历文件:\r\n " + sb.ToString());
return(CurrentService);
}
//如果不需要精密星历，且数据文件夹中有导航文件，则加载之
if (ObservationDataSources != null && !this.ProcessOption.IsPreciseEphemerisFileRequired)
{
ObservationDataSources.TryLoadEphemerisServices();
if (ObservationDataSources.EphemerisServices.Count > 0)
{
this.CurrentService = ObservationDataSources.EphemerisServices.First;
var msg = "设置没有指定星历，也不需要精密星历，发现了导航星历，因此采用此一个导航星历。" + this.CurrentService;
log.Info(msg);
return(CurrentService);
}
}
//自动匹配精密星历
if (DataSourceOption.EnableAutoFindingFile)
{
// new IgsEphemerisServiceAutoProvider(DataSourceOption.GetIgsProductSourceOption(CurrentSession)).GetEphemerisService();
GlobalIgsEphemerisService.Instance.IgsEphAutoProvider.IsConnectIgsProduct = this.ProcessOption.IsConnectIgsDailyProduct;
//尝试获取一个，如果失败则表示不可用
if (CurrentSession.SatelliteTypes.Count == 0)
{
log.Error("请指定GNSS系统类型");
}
else if (GlobalIgsEphemerisService.Instance.IsAvailable(this.CurrentSession.TimePeriod.Start, this.CurrentSession.SatelliteTypes[0]))
{
this.CurrentService = GlobalIgsEphemerisService.Instance;
if (this.CurrentService == null || CurrentService.SatCount == 0)
{
log.Info("没有匹配上星历文件 " + CurrentService);
}
else
{
//设置拟合阶次，放在此处不是很合理，2019.05.15，czs
GlobalIgsEphemerisService.Instance.IgsEphAutoProvider.InerpolateOrder = this.ProcessOption.EphemerisInterpolationOrder;
log.Info("成功自动匹配星历文件 " + CurrentService);
return(CurrentService);
}
}
}
//自动匹配精密星历
//if (DataSourceOption.EnableAutoFindingFile)
//{
// this.EphemerisService = new IgsEphemerisServiceAutoProvider(DataSourceOption.GetIgsProductSourceOption(CurrentSession)).GetEphemerisService();
// if (this.EphemerisService == null || EphemerisService.SatCount == 0) { log.Info("没有匹配上星历文件 " + EphemerisService); }
// else
// {
// log.Info("成功自动匹配星历文件 " + EphemerisService);
// return EphemerisService;
// }
//}
//NGA星历匹配
if (ProcessOption.IsEnableNgaEphemerisSource && DataSourceOption.EnableAutoFindingFile && Setting.EnableNet)
{
Time obsTime = CurrentSession.TimePeriod.Start;
Time time = Time.UtcNow;
var span = (time - obsTime); //与当前的时间差
var isWithTwoDays = span < 48 * 3600; //IGS快速星历服务
//NGA只有预报星历，取消之。应急采用。
TryAddNgaEphemeris(obsTime, isWithTwoDays);
if (this.CurrentService == null || CurrentService.SatCount == 0)
{
log.Info("没有匹配上星历文件 " + CurrentService);
}
else
{
log.Info("成功自动匹配 NGA 星历文件 " + CurrentService);
return(CurrentService);
}
}
//还没有匹配上，寻找导航文件
if ((CurrentService == null || CurrentService.SatCount == 0))
{
ObservationDataSources.TryLoadEphemerisServices();
if (ObservationDataSources.EphemerisServices.Count > 0)
{
this.CurrentService = ObservationDataSources.EphemerisServices.First;
var msg = "最后时刻，采用了一个导航星历。" + this.CurrentService;
log.Info(msg);
}
}
if ((CurrentService == null || CurrentService.SatCount == 0))
{
this.CurrentService = GlobalIgsEphemerisService.Instance;
var msg = "星历服务匹配失败！！！，仍然尝试用全局星历！";
log.Error(msg);
// throw new ArgumentException(msg);
}
return(this.CurrentService);
}
