CONTENTS

I. NAVIGATION INSTRUMENTS
S.I. Donchenko, V.F. Fateev, V.P. Lopatin, R.A. Davlatov
A review of the methods and means of satellite gravimetry and the setting of the task of researching the capabilities of a multi-satellite gravimetric system based on nanosatellites ……. page 8
S.I. Donchenko, V.F. Fateev, R.A. Davlatov 
Ballistic structure of the NANO-KA multi-satellite low-orbital cluster for performing radar and gravimetric measurements ……. page 52
S.I. Donchenko, V.F. Fateev, R.A. Davlatov
Theoretical substance and research of methods for measurement of the first, second and third gradients of gravitational potential in a nano-satellite cluster by direct GNSS signals ……. page 60

II. INSTRUMENTS AND METHODS OF MEASUREMENT (BY TYPE OF MEASUREMENT)
B.G. Potapov, A.A. Petukhov, Ya.E. Razhba, M.Yu. Ghavalyan, V.G. Kytin, N.A. Beketov, A.I. Pokhodun
Optimization of realization routine of the carbon dioxide triple point in the cell designed for long stem resistance thermometers ……. page 80
К.V. Epifantsev 
Investigation of the centering alignment process of MAHRFORM MMQ200 and ROUNDTEST RA 120P round meters for potential import substitution ……. page 91

III. METHODS AND INSTRUMENTS FOR MONITORING AND DIAGNOSTICS OF MATERIALS, PRODUCTS, SUBSTANCES AND THE NATURAL ENVIRONMENT
M.S. Shkurkin
Test equipment and measuring procedure for test site validation according CISPR 25 ……. page 102
L.V. Zhorina, G.N. Zmievskoy, I.D. Matveev
Measurement of dose determining photodynamic effect in case of uneven illumination of irradiation zone ……. page 111

IV. METROLOGY AND METROLOGICAL SUPPORT
A.V. Mosichkina, M.V. Okrepilov, B.Ya. Litvinov
Analysis of the modern system of forming and assessing labour functions of metrology specialists ……. page 119
S.B. Smagulov
The State Primary Standard of Units of Time, Frequency and National Time Scale of the Republic of Kazakhstan ……. page 124
S.V. Tsyplenkov, E.D. Agafonov
About the requirements for building an energy efficiency control system of artifical oil lift ……. page 137
A.V. Kamyshev, V.A. Smirnov, I.Yu. Shmigelsky, E.E. Gladyshev, K.K. Savrovsky
Current state of metrological support for measurements of mechanical stresses using the acoustoelasticity effect ……. page 146

IV. ACOUSTICS
M.M. Mazur, L.I. Mazur, V.N. Shorin, A.A. Pavlyuk, L.L. Paltcev
Acousto-optic modulator for fiber systems on a crystal LiBi(MoO₄)₂ ……. page 162