Doppler frequency shift during ionospheric propagation of decameter radio waves (review)

Namazov, S. A.; Novikov, V. D.; Khmel'nitskii, I. A.

doi:10.1007/bf01036419

Cited by 14 publications

(9 citation statements)

References 73 publications

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“…Recall that the experiment on 10 March 2002 was carried out after sunset. Doppler shifts of the direct signal on the London-St. Petersburg path exhibit so called S-type track that is a typical signature of the ionospheric disturbance induced by a solar terminator (Namazov et al, 1975). Tromsø dynasonde data revealed that the decrease of the maximum plasma frequency of the F2 layer, f 0 F2, accompanied by the increase of the HF pump wave reflection altitude, h H , occurred after 18UT (see Fig.…”

Section: Experiments On 8 and 10 March 2002mentioning

confidence: 98%

Artificial field-aligned irregularities in the nightside auroral ionosphere

Blagoveshchenskaya

Борисова

Kornienko

et al. 2006

Advances in Space Research

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Section: Experiments On 8 and 10 March 2002mentioning

confidence: 98%

Artificial field-aligned irregularities in the nightside auroral ionosphere

Blagoveshchenskaya

Борисова

Kornienko

et al. 2006

Advances in Space Research

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“…Hence we use the International Reference Ionosphere Model (Bilitza et al, 2017;Rawer et al, 1978) to obtain the electron density values, and Earth Global Reference Atmospheric Model (Leslie and Justus, 2011) to obtain the temperature and pressure values, which are used to estimate the ionospheric and tropospheric Coord. from (-19167.235509, 3652.729794, 18038.749481) to (-26493.102586, 424.868409, 3830.004962 influences on the signals' frequencies (Millman and Arabadjis, 1984;Namazov et al, 1975). The height and geopotential of the two ground sites will be also influenced by periodical tidal effect, which is well modeled (Voigt et al, 2017) and can be removed by some mature softwares such as ETERNA (Wenzel, 1996) and…”

Section: Input Datamentioning

confidence: 99%

Unification of global vertical height system using precise frequency signal links

Shen¹,

Shen²,

Zhang³

2020

Preprint

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<p>The realization of International Height Reference System (IHRS) is one of the major tasks of the International Association of Geodesy (IAG). Here we formulate a framework for connecting two local VHSs using ultra-precise frequency signal transmission links between satellites and ground stations, which is referred to as satellite frequency signal transmission (SFST) approach. The SFST approach can directly determine the geopotential difference between two ground datum stations without location restrictions, and consequently determine the height difference of the two VHSs. Simulation results show that the China&#8217;s VHS and the US&#8217;s VHS can be unified at the accuracy of several centimeters, provided that the stability of atomic clocks used on board the satellite and on ground datum stations reach the highest level of current technology, about 4.8&#215;10<sup>-18</sup> in 100 s. The SFST approach is promising to unify the global vertical height datum in centimeter level in future, providing a new way for the IHRS realization. This study is supported by NSFCs (grant Nos. 41721003, 41631072, 41874023, 41804012, 41429401, 41574007) and Natural Science Foundation of Hubei Province of China (grant No. 2019CFB611).</p>

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“…The frequency of a microwave signal will be affected by ionosphere and troposphere environment. We adopt the International Reference Ionosphere Model (Bilitza et al, 2017;Rawer, Bilitza, & Ramakrishnan, 1978) to obtain the electron density values to estimate the ionospheric influence (Namazov, Novikov, & Khmel'nitskii, 1975). Since the height Given the gravitational potentials at orbits of GSs, the gravitational potential at the orbit of TS can be obtained.…”

Section: Input Datamentioning

confidence: 99%