Ten years ago low-cost but high-precision positioning options did not exist. But this has changed and the trend will continue. Outlined in this article are 3 options for satisfying positioning requirements using GNSS-based sensors.
Navigation Hardware
Accelerometer: Zero-g Offset Temperature Coefficient
Accelerometer: Zero-g offset Temperature Coefficient Other Names bias thermal drift, offset temperature slope, offset or bias thermal response Examples Device Name Value Honeywell HG1120BA50 Bias Repeatability is given over both time and thermal conditions NA CTi Sensors CS-IM100 Bias change
Accelerometer: Zero-g Offset
Other Names zero-g or 0g offset, bias, bias repeatability, turn-on to turn-on bias, zero-g output Examples Device Name Value Honeywell HG1120BA50 Bias Repeatability, at any given time or thermal condition 16mg, 1$\sigma$ CTi Sensors CS-IM100 Zero offset error, at
Accelerometer: Full Scale Range
Other Names Full scale range (FSR), input range, dynamic range, measurement range, operating range Examples Device Name Value Honeywell HG1120BA50 Operating Range -16 to 16g CTi Sensors CS-IM100 Range selectable ±2, ±4, ±8g This is one of the more straight
Inertial Sensor Performance Parameters
Navigation systems rarely have the benefit of directly measuring the information desired. The same can be said about the utility of navigation sensors. The desired state may be the position and terrain slope, but what is measured in simply the
Accelerometer Performance: 3, 6, or 9-Axis Sensors?
Combined Functionality: What do you lose? There is a trend towards combining hardware components and even processors into single chips. This is certainly true for inertial sensors: 3-axis: accelerometer only 6-axis: accelerometer, gyro 9-axis: accelerometer, gyro, magnetometer where each sensor