CONTENTS

I. INSTRUMENTS AND METHODS OF MEASUREMENT (TIME AND FREQUENCY MEASUREMENTS)
M.G. Gurov, E.G. Gurova
Simplified atomic oven for the optical lattice clocks ……. page 8
F.F. Karpeshin, L.F. Vitushkin
Principles of resonant optical pumping of the 8.3 eV isomer ^229mTh for creation of the nuclear-optical frequency standard ……. page 19

II. NAVIGATION INSTRUMENTS
M.M. Murzabekov, V.F. Fateev, I.S. Silvestrov
On the issue of methods and means of autonomous navigation through the geophysical fields of the Earth ……. page 30
M.M. Murzabekov, V.F. Fateev
Current state of development of autonomous navigation systems on the Earth’s magnetic field on an air carrier ……. page 33
R.M. Vasiliev, E.V. Zemtsova, I.V. Sidyakin, M.A. Cherkasova
Calibration method of the signal simulator of global navigation satellite systems GLONASS and GPS using a secondary standard of the phase shift angle ……. page 43

III. METHODS AND INSTRUMENTS FOR MONITORING AND DIAGNOSTICS OF MATERIALS, PRODUCTS, SUBSTANCES AND THE NATURAL ENVIRONMENT
P.A. Alexandrov, A.V. Alexandrova, E.A. Antonov, V.K. Ilyin, V.I. Kalechits, I.E. Kovbasyuk, O.Yu. Maslakov, N.A. Usanova, E.S. Khozyasheva, M.N. Shakhov
The accumulation dynamics studies of aerosols and microscopic fungi spores in the air environment of a hermetic inhabited facility during the series of SIRIUS isolation experiments ……. page 52
A.S. Sergeeva, A.V. Kasilyunas, O.S. Golynets
The progress of development of certified reference material for composition of chocolate ……. page 65

IV. METROLOGY AND METROLOGICAL SUPPORT
S.V. Prokunin, D.A. Vengina, V.I. Dobrovolskiy, A.N. Shchipunov
Ways to reduce the combined standard uncertainty of рH measurements on the state primary standard ……. page 78
A.E. Isaev, A.M. Polikarpov
Representation of the hydrophone frequency response by a formula as practical feasibility and expansion of the capabilities of metrology digital platform ……. page 89
I.V. Bezmenov
Trend detection in time series of measurement data ……. page 106
S.O. Plotnikov 
Analysis of the directions of innovative development of measuring tools in the Russian Federation ……. page 140
E.N. Tsyba, O.A. Volkova, N.A. Vostrukhov
Experience of using autoencoders in solving problems of detecting anomalies in time series of measurement information ……. page 150

V. ANTENNAS, MICROWAVEW DEVICES AND THEIR TECHNOLOGIES
S.R. Zanizdra, A.S. Zavgorodnii
A radiation pattern reconstruction using phaseless electric field measurement on two planes in near-field zone ……. page 161