GPS Pivot Point Solution File

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The GPSPivotPointSolutionFile object provides functionalities for reading and writing GPS Pivot Point Solution files. This is an ASCII file of Point Solution data as put out by the Pivot GPS receiver. The time system is UTC, and position and velocity values are given in the MJ2000 reference frame.

 

•For information on how to simulate Point Solution data, see Simulating Tracking Data.

•For information on how to generate GPS Pivot Point Solution files, see Generating Tracking Data Files.

•For information on viewing and editing data in a GPS Pivot Point Solution file, see Using the Tracking Data Editor.

•For information on including a GPS Pivot Point Solution file in a Kalman Filter, Unscented Kalman Filter, or Batch Least Squares OD process, see Including Tracking Data in an Estimation Process.

 

An example of the format of a GPS Pivot Point Solution file is given below. The columns from left to right include measurement data as follows:

 

•Packet ID (not used by FreeFlyer)

•Packet Sequence Number - numeric value from 0000 to 99999 (not used by FreeFlyer)

•Spacecraft ID

•Day/Month/Year (ddmmyyyy) - (UTC)

•Hour/Minute/Second (hhmmss.sss) – (UTC)

•X Position (meters)

•Y Position (meters)

•Z Position (meters)

•X Velocity (meters/sec)

•Y Velocity (meters/sec)

•Z Velocity (meters/sec)

•Yaw Angle (radians) (not used by FreeFlyer)

•Pitch Angle (radians) (not used by FreeFlyer)

•Roll Angle (radians) (not used by FreeFlyer)

•Yaw Rate (radians/sec) (not used by FreeFlyer)

•Pitch Rate (radians/sec) (not used by FreeFlyer)

•Roll Rate (radians/sec) (not used by FreeFlyer)

 

0000  0000  101   01082008    000033.000      -452888.009   6675172.154 2341558.052 968.920     2519.831    -6995.997   0.000000    0.000000    0.000000    0.000000    0.000000    0.000000

 

0000  0000  101   01082008    000133.000      -393873.588   6812791.792 1917341.329 997.393     2066.512    -7139.552   0.000000    0.000000    0.000000    0.000000    0.000000    0.000000

 

0000  0000  101   01082008    000233.000      -333289.855   6922975.894 1485373.306 1021.852    1604.720    -7254.231   0.000000    0.000000    0.000000    0.000000    0.000000    0.000000

 

0000  0000  101   01082008    000333.000      -271340.640   7005251.942 1047399.468 1042.163    1136.379    -7339.628   0.000000    0.000000    0.000000    0.000000    0.000000    0.000000

 

0000  0000  101   01082008    000433.000      -208313.963   7059253.745 605225.112  1058.298    663.409     -7395.361   0.000000    0.000000    0.000000    0.000000    0.000000    0.000000

 

0000  0000  101   01082008    000533.000      -144435.366   7084786.432 160554.850  1070.161    187.673     -7421.187   0.000000    0.000000    0.000000    0.000000    0.000000    0.000000

 

 

 

See Also

•GPSPivotPointSolutionFile Properties and Methods