INS
GUI User’s Manual
Inertial Labs, Inc
TM
Address: 39959 Catoctin Ridge Street, Paeonian Springs, VA 20129 U.S.A.
Tel: +1 (703) 880-4222, Fax: +1 (703) 935-8377 Website: www.inertiallabs.com
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VG3D calibration is designed for carrier objects that can operate in full
heading, pitch and roll ranges. VG3D calibration is similar to 3D calibration
but allows performing simpler rotation than is necessary for 3D calibration.
Note: VG3D calibration is at the testing stage. Please contact Inertial Labs about the
possibility of using the VG3D calibration.
2D-2T calibration is designed instead of 3D calibration for carrier object that
operates with limited range of pitch and roll angles. This calibration involves
several (two or more) 2D calibration procedures but with different pitch
angles. During every 2D calibration run with set pitch angle, tilt angles must
be constant as possible. In the calibration those INS readings are used only
in which pitch and roll differ from their median not more than inclination
threshold set in appropriate field Fig. 4.3.
Note that rotation of the carrier object with the INS both for all calibration
procedures must include one or more full 360 turns in the horizon plane.
Field calibration procedures are developed by Inertial Labs after type
of the object, on which the Inertial Labs
®
INS will be installed, is agreed
on with a customer.
10.4.1. Description of the 2D, 2D-2T, 3D and VG3D calibration
procedures
Step 1 – Step 2. Perform Step 1 – Step 2 from the section 10.1.
Step 3. Set correct coordinates “Latitude”, “Longitude”, “Altitude”
and “Date” in accordance with place where INS is calibrated. Their values
are set in the “Device Options” window (see Fig. 4.2).
Step 4. Select “Mag Field Calibration” item from the “Plugins” menu
(Fig. 3.4). “Mag Field Calibration” window (Fig. 8.3) will open.
Step 5. Select “2D”, “2D-2T”, “3D”, or “VG3D” calibration from drop-
down list in the “Calibration Type” field.
Step 6. Using arrows or entering the necessary value from a keyboard
set the time required for accumulating data which would be sufficient to
accomplish the calibration procedure, in the “Accumulation time” window.
Please set time which is enough for 1…3 full 360 turns of the carrier object
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