/// <summary>
/// 读取头文件。
/// </summary>
/// <param name="fileName">文件路径</param>
/// <returns></returns>
private static AntennaHeader ReadHeader(string fileName)
{
using (StreamReader sr = new StreamReader(fileName))
{
AntennaHeader header = new AntennaHeader();
//Read one line from file
string line = sr.ReadLine();
//Get label. remove trailing and leading blanks
string label = line.Substring(60).Trim();
while (label != AntexLabel.END_OF_HEADER)
{
switch (label)
{
case AntexLabel.ANTEX_VERSION_SYST:
header.Version = Convert.ToDouble(line.Substring(0, 8));
char sys = line[20];
header.SatelliteSystem = (SatelliteSystem)Enum.Parse(typeof(SatelliteSystem), sys.ToString());
break;
//Process PCV type line
case AntexLabel.PCV_TYPE_REFANT:
ParsePcvType(header, line);
break;
case AntexLabel.COMMENT:
header.Comments.Add(line.Substring(0, 60).Trim());
break;
default: break;
}
line = sr.ReadLine();
label = line.Substring(60).Trim();
}
return(header);
}
}
/// <summary>
/// 解析PCV
/// </summary>
/// <param name="header"></param>
/// <param name="line"></param>
private static void ParsePcvType(AntennaHeader header, string line)
{
char pcvt = line[0];
switch (pcvt)
{
case 'A':
header.PcvType = PcvType.Absolute;
break;
case 'R':
header.PcvType = PcvType.Relative;
header.ReferenceAntena = line.Substring(20, 20).Trim();
if (header.ReferenceAntena == "")
{
header.ReferenceAntena = "AOAD/M_T"; //default
}
header.ReferenceAntenaSerial = line.Substring(40, 20).Trim();
break;
default:
throw new Exception("天线头部的 PCV 类型无效.");
}
}
/// <summary>
/// 解析一个天线段。
/// Fill most Antenna satData
/// </summary>
/// <param name="firstLine"></param>
/// <param name="sr"></param>
/// <param name="header"></param>
/// <returns></returns>
private static Antenna ParseAntenna(string firstLine, StreamReader sr, AntennaHeader header)
{
//These flags take care of "Valid From" and "Valid Until"
bool validFromPresent = false;
bool validUntilPresent = false;
//Create 'Antenna' object to be returned
Antenna antenna = CreateAntenna(firstLine);
antenna.Header = header;
//Read the rest of satData
string line;
//Read one line from file
line = sr.ReadLine();
string label = line.Substring(60).Trim();
// Repeat until 'endOfAntenna' line
while (label != AntexLabel.END_OF_ANTENNA)
{
//Process 'calibrationMehtod' line
switch (label)
{
case AntexLabel.METH_BY_DATE:
antenna.CalibrationMethod = (line.Substring(0, 20).Trim());
antenna.Agency = line.Substring(20, 20).Trim();
antenna.NumOfAntennas = line.Substring(40, 6).Trim();
antenna.Date = line.Substring(50, 10).Trim();
break;
case AntexLabel.DAZI:
antenna.DeltaAzimuth = (Convert.ToDouble(line.Substring(2, 6).Trim()));
break;
case AntexLabel.ZEN1_ZEN2_DZEN:
antenna.ZenithStart = (Convert.ToDouble(line.Substring(2, 6).Trim()));
antenna.ZenithEnd = (Convert.ToDouble(line.Substring(8, 6).Trim()));
antenna.DeltaZenith = (Convert.ToDouble(line.Substring(14, 6).Trim()));
break;
case AntexLabel.NUM_OF_FREQUENCIES:
antenna.NumOfFrequencies = (Convert.ToInt32(line.Substring(0, 6).Trim()));
break;
case AntexLabel.VALID_FROM:
Time valFrom = Time.Parse(line.Substring(0, 43));
antenna.ValidDateFrom = (valFrom);
validFromPresent = true;// Mark that we found "Valid From"
break;
case AntexLabel.VALID_UNTIL: // Get validity as Year, Month, Day, Hour, Min, Sec
Time valUntil = Time.Parse(line.Substring(0, 43));
antenna.ValidDateUntil = (valUntil);
// Mark that we found "Valid Until"
validUntilPresent = true;
break;
case AntexLabel.SINEX_CODE: //Get antenna Sinex Code
antenna.SinexCode = line.Substring(0, 10).Trim();
break;
case AntexLabel.COMMENT:
antenna.AddComment(line.Substring(0, 60).Trim());
break;
case AntexLabel.START_OF_FREQUENCY: //Get frequency indicator
label = ParseFrequency(sr, antenna, line);
break;
case AntexLabel.START_OF_FREQ_RMS: //Get frequency indicator
label = ParseFrequencyRms(sr, antenna, ref line);
break;
default:
break;
}
//Read another line from file
line = sr.ReadLine();
//Get current label
label = line.Substring(60).Trim();
}
//Take care of "Valid From" field if it was not present
if (!validFromPresent)
{
//Set as "DayTime: BEGINNING_OF_TIME"
antenna.ValidDateFrom = (Time.MinValue);
}
if (!validUntilPresent)
{
antenna.ValidDateUntil = (Time.MaxValue);
}
return(antenna);
}
