FireFly-IIA User Manual - Jackson Labs Technologies, Inc.

FireFly-IIA User ManualGPS:GYRO:CAL 2, 0, 0, 1.125, 1, 1All three axis need to be calibrated simultaneously as shown above for the X Axis.GPS:GYRO:CAL? returns the setting of the calibration factors of the accelerometer system.Due to the nature of the accelerometer chip, the Z axis will have the largest error and lowestsensitivity of all three axis. The X, and Y axis will have the best resolution and highest sensitivitywhen the unit is sitting level (horizontally).3.3.13 GPS:DYNAMic?This command allows the user to select the dynamic motion model being applied to the Kalmannfilters in the GPS receiver. This allows for larger amounts of filtering for lower velocity applications,effectively reducing noise. Applications with high acceleration can now be used with fast filtersettings to allow for the most accurate GPS coordinates to be provided in high-dynamic applicationssuch as Jet aircraft.Firmware version 1.04 and later add an automated feature where the unit will select the GPS profileitself based on the unit’s velocity. This alleviates the user from having to track the state of a missionand manually selecting the best dynamic setting.The command has the following syntax:GPS:DYNAMic [0,8]The following settings are available:Value Model Application0 Portable Recommended as a default setting1 Stationary Used in stationary applications2 Pedestrian Used in man-pack, pedestrian settings3 Automotive Vehicular velocity applications4 Sea Used on Ships, where altitude is expected to beconstant5 Airborne