Two approaches to synthesis of reduced Kalman filter with the guaranteed estimation quality are compared. Characteristics of the offered approaches is the choice of parameters of the filter so that the covariance matrix calculated in covariance channel of the synthesized suboptimal filter be not smaller than the actual covariance matrix for any time point. The first approach reaches the guaranteed estimation at the expense of increasing the disturbance noise. The second approach ensures it due to two factors: changing the dynamics matrix eigenvalues and introducing additional disturbance noise that makes it possible to increase filtration accuracy in solving a number of practical tasks.

This paper presents the development and study results of an attitude determination algorithm using GLONASS and GPS signals. The probability of correct ambiguity resolution in attitude determination is assessed for an exhaustive method, selecting the optimal combination of integer ambiguities by the maximum likelihood criterion.

The paper focuses on the use of a low-accuracy electromagnetic log exclusively for damping of inertial navigation system. The log errors considered include a number of errors depending on sailing conditions along with the speed of current. By the example of local level INS, the errors of INS sensors are shown to be almost not corrected. Modeling and experimental results are presented.

Assessment is made for the gravimeter output signal error caused by zero shift and distortion of nonlinear transformation function of the device. The methods to eliminate these errors are proposed. Experimental data showing the level of the error caused by distortion of transformation function because of the ambient temperature change are presented.

The article continues the analysis of the results of modeling of the anomalous Earth gravity field in high-latitude areas, causing the interest from the point of view of the development of the Arctic. We investigated the structure and accuracy of the deflections of the vertical in the Arctic. The study was carried out with the use of 16 mod-ern Russian and foreign models of spherical harmonics of the Earth gravity potential, including ultrahigh-degree EGM-2008 model, the first models created on the basis of satellite gradiometry data, and the latest Russian model GAO-2012.

The paper focuses on test bench calibration of fiber-optic gyros with linear output within strapdown inertial measurement units of various designs. The required calibration accuracy and rate table performance are defined

We present a method for tracking the 3-axis orientation of a monocular camera using orthogonal vanishing points detected in individual frames of a sequence of images. Ro-bust and real-time vanishing point detection is done using a standard line segment detection method and an adaptive RANSAC algorithm. Vanishing points and corresponding vanishing directions found in consecutive frames are associated with each other to produce a sequence of orientation quaternions, which is processed by an extended Kalman filter. Experiments with a consumer-level, handheld mobile device indicate that the accuracy of the proposed method is comparable with those of consumer-grade mechanical motion sensors.

This paper shows how the equations governing the relations between defects, commands and errors can be used to define a new control mode which combines Forceto-Rebalance and Whole-Angle modes in order to greatly improve performance. The implementation of those principles to the QuapasonTM gyro leads to the GVNG gyro (French acronym for Gyro Vibrant Nouvelle Génération – New Generation Vibrating Gyro), a new digitally controlled Coriolis Vibrating Gyroscope of which experimental results are presented in this paper.

The main technical characteristics of the strapdown inertial unit implemented on the basis of fiber-optic gyroscopes and pendulous accelerometers are investigated on a number of experimental test positions in the process of ground tests. Preliminary estimates of operational and accuracy characteristics are obtained.