Geometrics MagArrow, User Manual

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editor program. Upon closing the Survey Manager program, it will ask if you would like to save the
changes you’ve made.
Data Format
Survey Manager outputs a file in ASCII format with comma separated values (*.csv). The file will contain
header information for each of the individual columns. In order from left to right, here is what each
column represents:
Counter: This is a counter that increments by one for each new magnetometer reading. It serves to
make data processing and troubleshooting easier.
Date: This is the date for the measurement’s UTC time.
Time: This is the UTC time, in HH:MM:SS.sss format, at which the measurement occurred. The readings
with the fractional time "sss" of "000" are the ones that are aligned in time with the 1PPS pulse from the
GPS.
Latitude: This is degrees North or South as a decimal number.
Longitude: This is degrees East or West as a decimal number.
Mag: This is the magnetic field reading in nanoTeslas (nT) as a decimal number.
MagValid: This is a logical signal with "1" meaning true. It indicates if Mag is considered a valid reading.
Compass X: When included, this is the strength of the magnetic field component at right angles to the
mag arrow's body in nT. A positive value means that the earth’s North Pole is to the right of the
MagArrow in its normal flight orientation.
Compass Y: When included, this is the strength of the magnetic field component along the MagArrow's
body in nT. A positive value means that the earth’s North Pole is behind the MagArrow in its normal
flight orientation.
Compass Z: When included, this is the strength of the magnetic field component along a line vertical
with respect to the MagArrows flight orientation in nT. This number will be positive north of the
equator.
Gyroscope X: When included.
Gyroscope Y: When included.
Gyroscope Z: When included.
AccelerometerX: When included this is the measured acceleration at right angles to flight path in the
normal orientation of the MagArrow. The value will be near +1.0 when the right side of the MagArrow is
pointed upwards.
AccelerometerY: When included, this is the measured acceleration along the flight path in the normal
orientation of the MagArrow. The value will be near +1.0 when the front of the MagArrow is pointed
upwards.