AIS R-mode trilateration for GPS positioning and timing insurance

• Autorzy: Shyshkin, O. V. , Konovets, V. I. , Koshevyy, V. M.
• Języki publikacji: EN

Abstrakty

EN

Satellite navigation is the backbone of maritime navigation today. However, the technical vulnerability of on-board Global Navigation Satellite System (GNSS) receivers the satellite system greatly destabilizes maritime security due to the loss of ship’s position and accurate time. This article devoted to study an alternative method for obtaining coordinates and accurate time based on the use of automatic identification system (AIS) radio channels, so-called range mode (R-Mode). We use other AIS ship stations with reliable position data as reference stations and determine time of arrival for received AIS transmissions. To improve the accuracy of measuring signal arrival instance in the time difference of arrival (TDOA), that we utilize for trilateration, it is proposed signal oversampling and applying the fast Fourier transform (FFT) to the product of quadrature components of the baseband Gaussian minimum shift keying (GMSK) signal in the window of AIS time slot. To take into account the movement of other ships, appropriate coordinate corrections are foreseen, which can be calculated by dead reckoning or by the inertial navigation system of our ship. The proposed method is fully compatible with the existing AIS signals and may be employed in critical situations of locally limited (jamming, spoofing) GNSS abilities. It can be implemented as a separate unit, working for receiving in parallel with the mandatory AIS transponder.

Słowa kluczowe

EN

Automatic Identification System; Global Navigation Satellite System; Global Positioning System; positioning; navigation and timing; time division multiple access; R-mode; time of arrival; time difference of arrival

• Czasopismo: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
• Rocznik: 2024
• Tom: Vol. 18 No. 2
• Strony: 369--374
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Shyshkin, O. V.

• National University “Odessa Maritime Academy”, Odessa, Ukraine

autor

Konovets, V. I.

• National University “Odessa Maritime Academy”, Odessa, Ukraine

autor

Koshevyy, V. M.

• National University “Odessa Maritime Academy”, Odessa, Ukraine

Bibliografia

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• [7] Jamming and Spoofing of Global Navigation Satellite Systems (GNSS). INTERTANKO, 2019.
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• [12] Recommendation ITU‐R M.1371–5 (2014) Technical characteristics for an automatic identification system using time division multiple access in the VHF maritime mobile frequency band.
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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).

Identyfikatory

DOI

10.12716/1001.18.02.13