Tailoring OTHR Deployment in Order to Meet Conditions in Remote Equatorial Areas

Nikolic, Dejan; Tošić, Nikola; Dzolic, Bojan; Grbic, Nemanja; Petrović, Pavle; Djurdjevic, Ana; Lekic, Nikola

doi:10.1109/cspa.2019.8696093

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…Kada se završi procesiranje prijemnog signala, mogu se dobiti dragocene informacije kao što su mape okeanskog kretanja, spektar mapa talasa i pravac vetra. Neki od projekata koriste ove tehnike kako bi pratili brzinu vetra, morskih struja kao i praćenje brodova [3]. Metode obrade RD slike su pogodne za eliminisanje šuma i postoje već publikovani radovi gde je pokazano da se nad RD slikom mogu primeniti metode obrade slike [4].…”

Section: Slika 1 Rd Slika Kada Su Prisutne Određene Smetnje [2]unclassified

Statistička I Multimedijalna Analiza Radarske Slike U Prisustvu Led Šuma

Samcovic

Tošić

Drajic

et al. 2020

Zbornik Radova Trideset Osmog Simpozijuma O Novim Tehnologijama U Poštanskom I Telekomunikacionom Saobraćaju – Postel 2020

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Section: Slika 1 Rd Slika Kada Su Prisutne Određene Smetnje [2]unclassified

Statistička I Multimedijalna Analiza Radarske Slike U Prisustvu Led Šuma

Samcovic

Tošić

Drajic

et al. 2020

Zbornik Radova Trideset Osmog Simpozijuma O Novim Tehnologijama U Poštanskom I Telekomunikacionom Saobraćaju – Postel 2020

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“…From our point of view, this environment is among the most challenging environments in the world for the installation and operation of HF radar systems. Detailed elaboration of those challenges including very sharp, aggressive natural conditions, many sources of a strong man-made interference, and the ways to counter their influence have already been presented in [18]. For the purpose of tsunami measurement analysis presented in this paper, one segment of HF radar network is used and covers the western part of the Gulf of Guinea, namely the Bight of Benin, as shown in Fig.…”

Section: Tsunami-like Currents Observed By the Hf Radar Installamentioning

confidence: 99%

Remote Observation of a Small Meteotsunami in the Bight of Benin Using HF Radar Operating in Lower HF Band

Dzvonkovskaya¹,

Nikolic²,

Peric³

et al. 2019

IEEE Access

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High-frequency (HF) surface-wave (SW) radar systems have demonstrated their capability to capture the signals from seismic and non-seismic tsunami events using the estimation of surface current changes. Several ocean radar systems, operating in the upper HF band, were already optimized for tsunami alerting and installed for real-time tsunami monitoring at the coast. If the shelf extends tens of kilometers off the coast then the first appearance of tsunami waves can be monitored at the shelf quite early. On May 25, 2018, an HF SW phased-array radar system, operating in the lower HF band (6.9 MHz), detected strong changes in measured radial currents at distances up to 60 km off the coast. The system tracked the tsunami-like current pattern in the Bight of Benin. The wave propagation coincided with an atmospheric cold front passage. No earthquake occurred at that time but a strong atmospheric disturbance was present and it is the most likely reason for the detected disturbance. This localized event could be classified as a meteorological tsunami (meteotsunami). It is important to note that this is the very first detection of meteotsunami in the whole West African region. This detection showed the capability of the radar to measure unusual surface current velocities induced by tsunami waves using the lower part of the HF band. The detection of this tsunami-like event has shown good applicability of HF phased-array radar technology for offshore tsunami monitoring and providing safe navigation, in real-time. At the same time, it has been shown that a single HF SW radar system, originally optimized for vessel tracking at very long ranges using a proper output power, transmitter's noise optimization and integration time, can also be utilized as a component of Tsunami early warning systems (TEWS).

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“…) is an effective solution to maritime monitoring at distances up to 200 nautical miles (370 km) from the shore, [1]- [4]. Equipment of the HF-OTHR system is stored inside two shelters, located up to 1 km apart [3]. A radar signal is generated inside the shelter located near the receiving array (Rx shelter) of the radar and needs to be transmitted to the shelter near the transmitting array (Tx shelter), where it is amplified and fed into antennas which radiate it towards the sea.…”

Section: Introduction Igh-frequency Over-the-horizon Radar (Hf-othrmentioning

confidence: 99%

Testing RFoF link for transmitting HF-OTHR signal between transmitter and receiver shelters

Petrović¹,

Dzolic²,

Lekic³

et al. 2021

Telfor J

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HF-OTHR site contains two equipment shelters, up to 1 km away from each other, that need to be connected for transmitting a FMCW signal. This connection, if realized using a coaxial cable, has shown itself to be vulnerable to external electromagnetic discharges, which can damage the sensitive radar equipment. This paper explores and tests the possibility of using Radio-Frequency-over-Fiber (RFoF) link as an alternative to a coaxial cable for transmission of signal, in order to ensure the immunity from external sources of electromagnetic interference (EMI).

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Tailoring OTHR Deployment in Order to Meet Conditions in Remote Equatorial Areas

Cited by 7 publications

References 3 publications

Statistička I Multimedijalna Analiza Radarske Slike U Prisustvu Led Šuma

Statistička I Multimedijalna Analiza Radarske Slike U Prisustvu Led Šuma

Remote Observation of a Small Meteotsunami in the Bight of Benin Using HF Radar Operating in Lower HF Band

Testing RFoF link for transmitting HF-OTHR signal between transmitter and receiver shelters

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