//获取：空中速度消息
public static ADS_MessageInfo GetAirSpeed(byte[] ADSData)
{
ADS_MessageInfo info = new ADS_MessageInfo();
try
{
info.SubType = (int)(ADSData[4]);
if (info.SubType == 1 || info.SubType == 2)
{
byte west_east_flag = ADSData[8];
byte nouth_south_flag = ADSData[11];
UInt16 west_east_speed = (UInt16)((ADSData[9] & 0xFF) | (ADSData[10] & 0xFF) << 8);
UInt16 nouth_south_speed = (UInt16)((ADSData[12] & 0xFF) | (ADSData[13] & 0xFF) << 8);
info.AirDirection = ADS_DicMessage.GetDirectionofSpeed(info.SubType, west_east_flag, nouth_south_flag, west_east_speed, nouth_south_speed);
info.AirSpeed = ADS_DicMessage.GetAirSpeed(info.SubType, info.AirDirection, west_east_speed, nouth_south_speed);
}
else if (info.SubType == 3 || info.SubType == 4)
{
byte direction_flag = ADSData[14];
int speed_flag = (int)ADSData[17];
UInt16 direction = (UInt16)((ADSData[15] & 0xFF) | (ADSData[16] & 0xFF) << 8);
UInt16 speed = (UInt16)((ADSData[18] & 0xFF) | (ADSData[19] & 0xFF) << 8);
info.AirDirection = ADS_DicMessage.GetDirectionFor34(direction_flag, direction);
info.AirSpeedType = ADS_DicMessage.GetAirSpeedType(speed_flag);
info.AirSpeed = ADS_DicMessage.GetAirSpeedFor34(info.SubType, speed);
}
else
{
return(info);
}
info.ICAO = (uint)((ADSData[0] & 0xFF) << 16 | (ADSData[1] & 0xFF) << 8 | (ADSData[2] & 0xFF));
info.Type = (int)(ADSData[3]);
info.AimChange = ADS_DicMessage.GetAimChange((int)(ADSData[5]));
info.IFR = ADS_DicMessage.GetIFR((int)(ADSData[6]));
info.VerticalSpeedSource = ADS_DicMessage.GetVerticalSpeedSource((int)(ADSData[20]));
info.VerticalSpeedFlag = ADS_DicMessage.GetVerticalSpeedFlag((int)(ADSData[21]));
info.VerticalSpeed = ADS_DicMessage.GetVerticalSpeed((int)((ADSData[22] & 0xFF) | (ADSData[23] & 0xFF) << 8));
info.AtmosphereFlag = ADS_DicMessage.GetAtmosphereFlag((int)(ADSData[25]));
info.Atmosphere = ADS_DicMessage.GetAtmosphere((int)(ADSData[26]));
}
catch (System.Exception ex)
{
// ErrorRecord.ProcessError(ex.ToString());
}
return(info);
}