Doppler Station for Orbital Tracking of Low-Orbit Spacecrafts by Their Radio Beacon Signals

Bushuev, F. I.; Kaliuzhnyi, M.; Khalaley, M.; Kryuchkovskiy, V. F.; Kulichenko, M. O.; Shulga, O. V.

doi:10.18524/1810-4215.2018.31.144550

Cited by 2 publications

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“…There are two stages to clarify orbit elements of the given satellite: real time and post processing (Bushuev, 2018). In real time the radio signals are recorded in wavfiles using software defined radio and freeware program HDSDR (High Definition Software Defined Radio).…”

Section: Upgrading the Post-processing Of Observation Data Obtained Bmentioning

confidence: 99%

“…The program SatDoppler has been significantly upgraded compare with (Bushuev, 2018). The upgraded program uses model values of Doppler shift of frequency (fdop) and correlation analyses for searching radio signals emitted by tracked satellites and received by the station.…”

Section: Upgrading the Post-processing Of Observation Data Obtained Bmentioning

confidence: 99%

“…So, the errors of synchronizing (∆t) and determination of frequency (∆f) of the received radio signal are also obtained as a result of the correlation analysis. The value of ∆f is due to the difference in the nominal frequency of the receiver reference generator from the valid one (Bushuev, 2018).…”

Section: Upgrading the Post-processing Of Observation Data Obtained Bmentioning

confidence: 99%

“…The Doppler station was developed and tested in the RI "MAO" to investigate the possibility of using such stations to clarity the orbit of low-orbit satellites (Bushuev, 2018). The station uses a compact high-tech receiver of up to 1766 GHz frequency range that greatly simplifies and reduces the cost of its hardware (GNSS-SDR, 2019).…”

Section: Introductionmentioning

confidence: 99%

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First Results of Clarifying of Orbital Elements of Low-Orbit Spacecraft Using Observations of the Ri "Mao" Doppler Station

Kriuchkovskyi¹,

Bushuev²,

Kaliuzhnyi³

et al. 2019

OAP

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18 artificial satellites of the Earth, which emit radio signal at a frequency of 430-440 MHz during their flight in the Mykolaiv visibility zone, were found as a result of the searching carried out in the RI "MAO". 10 of 18 satellites during not less than 7 days each were automatically tracked by the Doppler station created in the RI "MAO". The frequency of received radio signal was automatically determined as a result of spectral processing of radio signal amplitudes registered by the station during satellite tracking. Herewith 5 of 10 satellites emitted non-harmonic broadband signals. The radial velocity of satellites is calculated using the frequency of received radio signals.The obtained values of radial velocity changing in time were used to clarify TLE (Two-Line Element) orbital elements of satellites. Initial orbital elements were downloaded from the space-track.org site. It would be noted that model values of Doppler shift of frequency, obtained using the initial orbital elements, also use for searching radio signals emitted by tracked satellites and received by the station. The regular (mean) and random (standard deviation) components of the difference (O-C) of measured and model values of radial velocity were calculated. A comparison of the regular and random components of O-C was made, which showed their slight decreasing after clarifying orbital elements.In order to improve the accuracy of the orbit determination, it is proposed to upgrade the station's hardware and software in order to reduce synchronizing and frequency determination errors. It is also proposed to use more accurate models as Doppler measurements, and the motion of satellites.АНОТАЦІЯ. В результаті проведеного в НДІ «МАО» пошуку виявлено 18 штучних супутників Землі, які при прольоті в зоні видимості Миколаєва випромінюють радіосигнал на частоті 430-440 МГц. Допплерівською станцією, створеною в НДІ «МАО», в автоматичному режимі проведено супроводження 10 із 18 супутників протягом не менше, ніж 7 діб кожен. Частота прийнятого радіосигналу визначалася в автоматичному режимі в результаті спектральної обробки амплітуди сигналів, зареєстрованих станцією під час супроводження супутників. При цьому із 10 супутників 5 випромінювали негармонічний широкосмуговий сигнал. За частотою прийнятого радіосигналу обчислювалася радіальна швидкість супутника.Отримані значення радіальної швидкості, що змінюються у часі, використовувалися для уточнення елементів орбіти супутника в форматі TLE (Two-Line Element). Початкові значення елементів орбіти завантажуються з сайту space-track.org. Зауважимо, що модельні значення допплерівського зсуву частоти, отримані з використанням початкових елементів орбіти, використовувалися також для пошуки радіосигналів, випромінюваних супутником і прийнятих станцією. Обчислювалися регулярна (середнє) та випадкова (СКП) складові різниці (О-С) виміряних і модельних значень радіальної швидкості. Проведено порівняння регулярної і випадкової складових О-С, яке показало незначне зменшення регулярної і випадкової складових О-С після ...

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Section: Upgrading the Post-processing Of Observation Data Obtained Bmentioning

confidence: 99%

Section: Upgrading the Post-processing Of Observation Data Obtained Bmentioning

confidence: 99%

Section: Upgrading the Post-processing Of Observation Data Obtained Bmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

First Results of Clarifying of Orbital Elements of Low-Orbit Spacecraft Using Observations of the Ri "Mao" Doppler Station

Kriuchkovskyi¹,

Bushuev²,

Kaliuzhnyi³

et al. 2019

OAP

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Observations of GEO and LEO Satellites: Radio Engineering Means of the Mykolaiv Astronomical Observatory

BUSHUEV¹,

KALIUZHNY²,

KRIUCHKOVSKY³

et al. 2022

Kosm. nauka tehnol.

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The radio engineering means of the RI “Mykolaiv Astronomical Observatory” are fully passive. To track satellites, they use radio signals emitted by the satellites themselves. Thus, the following means were developed and put into operation: 1) Simple INTerferometer NETwork (SintNet) for monitoring the orbital position of geostationary (GEO) satellites; 2) Doppler station for clarifying the orbital elements of low Earth orbit (LEO) satellites. Two SintNets operate now: European and Chinese. The European SintNet consists of 10 stations and tracks three co-located satellites simultaneously. The Chinese SintNet consists of four stations and tracks one satellite. The positional error (standard deviation) of satellites is about 200 m

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Doppler Station for Orbital Tracking of Low-Orbit Spacecrafts by Their Radio Beacon Signals

Cited by 2 publications

References 0 publications

First Results of Clarifying of Orbital Elements of Low-Orbit Spacecraft Using Observations of the Ri "Mao" Doppler Station

First Results of Clarifying of Orbital Elements of Low-Orbit Spacecraft Using Observations of the Ri "Mao" Doppler Station

Observations of GEO and LEO Satellites: Radio Engineering Means of the Mykolaiv Astronomical Observatory

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