№ 2 (34) 2023

CONTENTS

A message from the Directors of the BIPM and the BIML ……. page 10

I. DEVICES AND METHODS OF MEASUREMENT (BY TYPE OF MEASUREMENT)
M.L. Voskanov, N.P. Khatyrev
On the development of methods of unity of measurements of pressure of residual gas in vacuum using a quantum vacuummeter on ultracold atoms 6Li ……. page 12
A.V. Zamyatin, A.V. Vishnekov
Methodology for measuring and improving the accuracy of information transmission in the hydrosphere ……. page 19
A.M. Barekhov, N.R. Bazhenov, A.V. Mylnikov
Comparison of verification methods for phase noise analyzers ……. page 25
N.A. Askerov, D.B. Balashov
Test facility for measuring the speed of ultrasound in carbon dioxide at high temperatures and pressures ……. page 40

II. NAVIGATION DEVICES
V.F. Fateev
On the issue of relativistic effects of time and frequency scale shifts of ground and satellite quantum clocks in global navigation satellite systems ……. page 43
V.F. Fateev
Time and frequency in onboard quantum timekeepers of low-altitude geodetic satellites ……. page 65

III. METHODS AND DEVICES FOR MONITORING AND DIAGNOSTICS OF MATERIALS, PRODUCTS, SUBSTANCES AND THE NATURAL ENVIRONMENT
E.N. Tsyba
Satellite altimetry of the Caribbean Sea ……. page 88
F.G. Agaev, Kh.G. Asadov, G.V. Aliyeva
The method of optimal sub-pixel determination of the temperature of remote objects by means of remote sensing ……. page 104
К.V. Epifantsev
Comparative analysis of errors that occur when measuring objects on the “Roundtest” roundness measurement device and the “Quick Image” vision measuring machine ……. page 111
N.A. Askerov, A.V. Aprelev 
A method of graduation of acousto-optic alcoholmeters, excluding the dependence of the measurement result of the volume fraction of ethyl alcohol in the operating temperature range on the ambient temperature ……. page 121
N.A. Askerov, A.V. Aprelev 
Spectrometric studies of the ecological and physiological state of forests ……. page 127

IV. METROLOGY AND METROLOGICAL SUPPORT
V.F. Fateev, F.R. Smirnov, V.P. Lopatin 
Experiment for obtaining a quadruple value of the gravitational frequency shift in a stand on the basis of a hydrogen quantum clock ……. page 134
A.V. Zamyatin, A.V. Vishnekov 
Increasing the level of metrological support of the output control of rocket and space products using the example of a multi-zone scanning device ……. page 141
S.L. Pasynok 
Features of Earth’s axial rotation ……. page 151
V.P. Khodunkov 
An alternative to the absolute reproduction method temperature units: theoretical part ……. page 167
V.P. Sysoev, V.I. Vasilev, S.N. Ovchinnikov, A.S. Sinyakov
Source of atomic hydrogen for H-maser ……. page 183
M.A. Apreleva, A.V. Aprelev 
Using the capabilities of the Federal Information Fund to ensure the uniformity of measurements to assess the condition of the fleet of measuring instruments of radio engineering quantities ……. page 199