The IMU (Inertial Measurement Unit) tab allows the user to define how the software will handle inclined (or "tilted") pole measurements for equipment that supports this functionality.
- View GNSS Level: When enabled, a digital version of GNSS level-bubble will be displayed on-screen and will let the user know visibly whether the receiver is level enough to store a reading.
Note: A green circle indicates a reading can be stored; a red circle indicates that the incline of the pole exceeds the user configured tolerances, blocking the reading. The digital level is aligned on the X/Y axis of the receiver. The face of the receiver should be facing towards the operator for intuitive display.
- Sensor Mode: Indicate to what extent tilted GNSS measurements should be utilized.
- Level Tolerance: Indicate the allowable amount of how far out of level the pole can be. The tolerance is defined as the amount of distance error allowable on the ground and thus is a function of both the incline of the pole and the rod height.
- Incline Tolerance: Indicate the allowable amount of pole tilt from vertical.
- Sensor Utilities: This is a link to the GPS Utilities - Sensor Utilities command.
| ICON | Description |
|---|---|
 | OK to store. Either within level tolerance, or if incline adjustment is being used, within incline tolerance. |
 | IMU Uninitialized. This indicates there hasn't been enough motion to reliably perform incline adjustments. Unsafe to store the point. |
 | Magnetic interference detected, unsafe to store. Must level the receiver to within level tolerances to store. |
 | Unit motion detected, possibly unsafe to store. If you press store in this state, SurvPC will wait up to 1 second for the compass to stabilize before storing the point. |
 | Magnetic interference detected, but the unit is within level tolerance, so it is OK to store. Tilt adjustments will not be made. |
 | Out of tolerance. Either outside of level tolerance specifications, or outside of incline tolerance specification (if tilted pole is being utilized). |
 | Time delay. This indicates a time delay between the position message and the tilt message. Unsafe to store the point. |
 | IMU Not Calibrated. This indicates the user needs to spin the GNSS receiver on all three axes to reset the automatic calibration. Unsafe to store the point. |
 | Error State. This indicates that there is a low position quality or low tilt quality. Unsafe to store the point. |