iGage iG9 User Manual
27
The ‘
Incline Tolerance
’ is the maximum
allowable pole tilt in degrees.
Verifying the Tilt Function
SurvPC
has a ‘
One Point Sensor Test
’ accessible
from ‘
Equip: GPS Utilities: Sensor Utilities: One
Point Sensor Test
’:
Enter the correct rod height, ensure that the
receiver is FIXED and the IMU is initialized, then
click ‘
Start
’. A short average position will be
computed.
The dialog will then display the Distance and
Elevation errors assuming the tip of the pole
remains in a fixed location. Ideally, they will
both be nearly zero:
The reported ‘
Incline
’ is the pole tilt angle. The
‘
Tilt Dir
’ is the direction the pole is leaning
assuming the display is pointing towards the
operator.
The ‘
One Point Sensor Test
’ is valuable for field
crews to understand the limitations of tilt
compensation.
Tilt Related Raw Data Records
Raw files (.RW5) will have additional measurement records when tilt is enabled:
--GSRD,TXD-1.221,TYD-1.412,THD287.171,TDTiGage_IG9
--GSRL,TXL-0.250,TYL0.078,T2D0.262,TTL0.050
--GSAL,TEL-0.250,TNL0.078,TZL0.005,T2D0.262,TTL0.050
GSRD: Raw IMU Sensor Data Record
Included when ‘Use IMU’ is checked. Raw tilt measurements.
Header
Description
--GSRD
GNSS Sensors Raw Data, direct readings
TXD
Tilt X reading perpendicular to front display (degrees)
TYD
Tilt Y reading parallel to front display (degrees)
THD
IMU compass reading (degrees)
TDT
Tilt Sensor device name (degrees)
GSRL: Computed Deviation from Ground Mark
–
Digital Level Mode, no Corrections Applied
Included in Digital Level mode when no corrections are applied. Distance from GNSS Phase Center
(PC) to pole point Ground Mark (GM).
Header
Description
