r2 - 05 Aug 2011 - 18:35:58 - NicoleQuindaraYou are here: TWiki >  Documentation Web  >  WebLinks > UsersGuide > IonoBiasManual

IonoBias Application

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Description

This application will open and read several preprocessed RINEX obs files (containing obs types, EL, LA, LO, SR, or SS) and use the data to estimate satellite and receiver biases and to compute a simple ionospheric model using least squares and the slant TEC values.

Command Summary

Required Arguments:
Short Arg. Long Arg. Description
  --input Input RINEX observation file name(s).

Optional Arguments:

Short Arg. Long Arg. Description
-f   File containing more options.
  --XSat Exclude this satellite (<sat> may be <system> only).
-v --verbose Print extended output info.
-d --debug Increase debug level.
-h --help Print syntax and quit.
Ephemeris Input
  --navdir Path of navigation file(s).
  --nav RINEX navigation or SP3 file(s).
Output
  --datafile Data (AT) file name, for output and/or input.
  --log Output log filename.
  --biasout Output satellite+receiver biases file name.
Time Limits
  --BeginTime Start time, arg is of the form YYYY,MM,DD,HH,Min,Sec.
  --BeginGPSTime Start time, arg is of the form GPSweek, GPSsow.
  --EndTime End time, arg is of the form YYYY,MM,DD,HH,Min,Sec.
  --EndGPSTime End time, arg is of the form GPSweek, GPSsow.
Processing
  --NoEstimation Do NOT perform the estimation (default=false).
  --NoPreprocess Skip preprocesing; read (existing) AT file (default=false).
  --NoSatBiases Compute receiver biases ONLY, not RX+sat biases (default=false).
  --Model Ionospheric model type is linear, quadratic, or cubic.
  --MinPoints Minimum points per satellite required.
  --MinTimeSpan Minimum timespace per satellite required (minutes).
  --MinElevation Minimum elevation angle (degrees).
  --MinLatitude Minimum latitude (degrees).
  --MaxLatitude Maximum latitude (degrees).
  --MinLongitude Minimum longitude (degrees).
  --MaxLongitude Maximum longitude (degrees).
  --TimeSector Time sector (day--night--both).
  --TerminOffset Terminator offset (minutes).
  --IonoHeight Ionosphere height (km).

Examples

> IonoBias --inputdir data_set --navdir data_set --input s081213a.99o --input s081214a.99o
--input s081215a.99o --nav s081213a.99n --nav s081214a.99n --nav s081215a.99n --datafile output}
IonoBias, built on the GPSTK ToolKit, Ver 1.0 6/25/04, Run 2006/08/17 09:50:59
IonoBias output directed to log file IonoBias.log
IonoBias timing: 6.210 seconds.
\end{lstlisting}

\begin{verbatim}
Output File Snippet

    3     3 Number (max, good) stations in this file
010101101100001111110111011101110
010101101100001111110111011101110
010100101100001111110111011101110
Npt  9737 Sta 85408 LLH    30.2160   262.2746   163.4226
1021      0.0   0.00000 -463513.64930 0.32    0.000      1  1   1
1021      0.0   0.00000 -463513.64930 0.32    0.000      1 14   1
1021      0.0   0.00000 -463513.64930 0.32    0.000      1 15   1
1021      0.0   0.00000 -463513.64930 0.32    0.000      1 21   1
1021      0.0   0.00000 -463513.64930 0.32    0.000      1 22   1
1021      0.0   0.00000 -463513.64930 0.32    0.000      1 25   1
1021      0.0   0.00000 -463513.64930 0.32    0.000      1 29   1
1021      0.0   0.00000 -463513.64930 0.32    0.000      1 30   1
1021     30.0   0.00000 -463513.52430 0.32    0.000      1  1   1
1021     30.0   0.00000 -463513.52430 0.32    0.000      1 14   1

Notes

Input can be either on the command line or put in a file and the input using the -f<file> option. The file is formatted just as if it were the command line.

-- NicoleQuindara - 03 Aug 2011

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