Update README.md

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OSQZSS 2015-08-30 09:12:05 +09:00
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@ -23,8 +23,9 @@ $ gcc gpssim.c -lm -fopenmp -o gps-sdr-sim
### Generating the GPS signal file
A user-defined trajectory can be specified in a CSV file, which contains
the Earth-centered Earth-fixed (ECEF) user positions at 10Hz.
A user-defined trajectory can be specified in either a CSV file, which contains
the Earth-centered Earth-fixed (ECEF) user positions, or an NMEA GGA stream.
The sampling rate of the user motion has to be 10Hz.
The user is also able to assign a static location directly through the command line.
The user specifies the GPS satellite constellation through a GPS broadcast