In recent years, it has become clear that global navigation satellite systems (GNSS) have insufficient immunity to noises. In this regard, the paper discusses possible methods and tools ensuring ...high-precision navigation measurements without using GNSS, and their current development status.
July 2022 marks the 60th anniversary of the first mission of a Soviet submarine to the geographic North Pole. This and subsequent missions required new navigation aids to be developed. This paper ...studies the development of the navigation aids used in the polar missions.
The paper addresses the systematic error of an inertial navigation system, caused by the discrepancy between the plumb line and the normal to the reference ellipsoid surface. The methods of this ...discrepancy estimation, and their use for correcting the output data of inertial navigation systems are studied.
The Outlook for Gyroscopy Peshekhonov, V. G.
Gyroscopy and navigation (Online),
07/2020, Letnik:
11, Številka:
3
Journal Article
Recenzirano
Modern gyroscopy is characterized by a great diversity of gyroscopes that have been and are being developed. Dominant positions belong to wave optic gyroscopes implementing the relativistic Sagnac ...effect, and micromechanical vibratory gyroscopes the operating principle of which is based on Coriolis effect. At the same time, high-precision rotor mechanical gyroscopes based on the principles of rotating solid body dynamics partially retain their position; also, the research of gyroscopes developed on the principles of nuclear physics and quantum optics is progressing successfully. Current state and the prospects of gyroscopes development are discussed in this paper.
The Author of Precision Gyroscope Peshekhonov, V. G.
Gyroscopy and navigation (Online),
2020/4, Letnik:
11, Številka:
2
Journal Article
Recenzirano
The paper presents the brief history of development of a precision gyroscope with electrostatic suspension of rotor; the main problems of constructing a gyro with a hollow rotor, as well as their ...solutions found by the chief designer A.S. Anfinogenov are discussed.
Short Age of Radiosextant Peshekhonov, V. G.
Gyroscopy and navigation (Online),
07/2018, Letnik:
9, Številka:
3
Journal Article
Recenzirano
The paper presents brief history of development of new autonomous navigation equipment, a radio astronavigation system (radiosextant), and discusses new technological solutions implemented in the ...radiosextant, as well as the reasons for stopping its further development.
In eukaryotes, DNA damage tolerance (DDT) is determined by two repair pathways, homologous repair recombination (HRR) and a pathway controlled by the RAD6-epistatic group of genes. Monoubiquitylation ...of PCNA mediates an error-prone pathway, whereas polyubiquitylation stimulates an error-free pathway. The error-free pathway involves components of recombination repair; however, the factors that act in this pathway remain largely unknown. Here, we report that the
HIM1
gene participates in error-free DDT. Notably, inactivation
RAD30
gene encoding Polη completely suppresses
him1
-dependent UV mutagenesis. Furthermore, data obtained show a significant role of Polη in
him1
-dependent mutagenesis, especially at non-bipyrimidine sites (NBP sites). We demonstrate that
him1
mutation significantly reduces the efficiency of the induction expression of
RNR
genes after UV irradiation. Besides, this paper presents evidence that significant increase in the dNTP levels suppress
him1
-dependent mutagenesis. Our findings show that Polη responsible for
him1
-dependent mutagenesis.
The paper analyzes the development of strapdown inertial airborne gravimeters, which have significant advantages over gyrostabilized gravimeters in terms of size, power consumption and cost and ...substantially expand the capabilities of gravity survey. Technical solutions are described that make implementation of strapdown airborne gravimeters possible. The trends in their development are discussed, including integration of data from strapdown and gyrostabilized gravimeters.
The fundamental limitations for the basic metrological parameters of the nuclear magnetic resonance gyro (NMRG) are analyzed. The determinant factors limiting its sensitivity, such as atomic ...projection noise and light shot noise, are considered. Formulas are derived to estimate the ultimate sensitivity of the NMRG and study its dependence on the parameters of the sensitive element. The main causes of NMRG drifts and possible ways to improve its metrological characteristics are discussed.
The paper presents the gravimeters for measuring the gravity from moving platforms, and the stages of their development at the Concern “Central Scientific Research Institute “Elektropribor” ...(hereinafter CSRI Elektropribor). Engineering solutions are described, due to which high accuracy of measurements has been achieved. The authors discuss popular applications of mobile gravimeters.
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