Mars orbiter magnetometer (MOMAG) is one of seven science payloads onboard Tianwen-1’s orbiter. Unlike most the satellites, not magnetically cleaned, and boom where placed magnetometer’s sensors long enough. These pose many challenges to magnetic field data processing. In this study, we introduce in-flight calibration process Tianwen-1/MOMAG. The interference including spacecraft generated dyna...

Abstract A stretch wire magnetometer is a versatile instrument and can be treated as the primary standard of magnetic qualification accelerator magnets. Bhabha Atomic Research Centre has developed Stretch measurement system to cater requirements measurements on This bench also includes vibrating system. The scheme used in this for flux ensures drift compensations after each scan. feature along ...

In a strapdown magnetic compass, heading angle is estimated using the Earth's magnetic field measured by Three-Axis Magnetometers (TAM). However, due to several inevitable errors in the magnetic system, such as sensitivity errors, non-orthogonal and misalignment errors, hard iron and soft iron errors, measurement noises and local magnetic fields, there are large error between the magnetometers'...

Abstract. Commercially available anisotropic magnetoresistive (AMR) magnetometers exhibit on the order of 1 nanotesla (nT) sensitivity in small size, weight, and power (SWaP) packages. However, AMR magnetometer accuracy is diminished by properties such as static offsets, gain uncertainty, off-axis coupling, temperature effects. This work presents a measurement magnitude these effects for Honeyw...

This article demonstrates the performance of an improved particle swarm optimization (PSO) algorithm with scalar checking and rotation axis fitting objectives using in-orbit data, which is obtained from two CubeSats missions, Aalto-1 ESTCube-1, as well simulation reference. The uses sequential refinement process to combine objectives. improvement addresses some challenges magnetometer calibrati...

Inertial navigation is a device, which estimates its position, based on sensing external conditions (such as acceleration or angular velocity). It widely used in variuos applications. Its presence drone vehicle for example, allows flight stabilization, by position estimation and feedback-based regulation algorithm execution. A smartphone makes use of inertial detecting movement flipping screen ...

We report on extensive studies on the intrinsic sensitivity of a combined He/Cs magnetometer. The magnetometer relies on the detection of the free spin precession of nuclear spin polarized He by optically pumped cesium magnetometers. We characterize the relevant processes involved in the detection and quantify their impact on the total sensitivity of the magnetometer. An expression is derived t...

In inertial body tracking, the human body is commonly represented as a biomechanical model consisting of rigid segments with known lengths and connecting joints. The model state is then estimated via sensor fusion methods based on data from attached inertial measurement units (IMUs). This requires the relative poses of the IMUs w.r.t. the segments-the IMU-to-segment calibrations, subsequently c...

In this thesis, we consider the problem of estimating position and orientation (6D pose) using inertial sensors (accelerometers and gyroscopes). Inertial sensors provide information about the change in position and orientation at high sampling rates. However, they suffer from integration drift and hence need to be supplemented with additional sensors. To combine information from the inertial se...

Abstract The strapdown magnetic vector measurement system, which can measure the and attitude of a magnetometer simultaneously, has wide applications in geophysical prospecting, etc. Calibration systematic errors, including errors misalignment is essential for this system. Traditional methods calibrate these two separately, with problem cumbersome steps being dependent on special data acquisiti...