HF surface waves radar is a well known solution to maritime surveillance, complementary to conventional microwave radar. HFSWR systems are not new; advantages and drawbacks of this technology are also well known. In particular, the poor resolution, the large infrastructure which is required, can reduce the global benefit of this technology in spite of its intrinsic interest. Purpose is to summarize the main principles of radar design optimization and to discuss innovative solutions to facilitate the compromise in adjusting the different radar parameters. Digital radar technology, today available in this frequency band, appears as one of the most interesting evolution, providing reconfigurable waveform matched to the environment and access to a wider band and better range resolution that those of conventional HFSWR. Digital radar in HF band is illustrated by experimental results obtained from a radar testbed operating in the Singapore waters and assembled from commercial on the shelves components. Preliminary observations and detections have shown the system to be working. For example, a cooperative ship target (18m in length) with an average speed of 7kts could be detected at ranges more than 30km. Opportunistic ship targets and air targets were detected at ranges more than 100km and 50km respectively. Samples of typical range-doppler maps are shown at frequencies of 5MHz and 20MHz. As expected from simulations, the first order Bragg lines extend to a longer range at low frequencies than at high frequencies. The sea clutter behaviour at different carrier frequencies was studied to determine the sea clutter statistics and for comparison with theoretical models. In addition, the target RCS behaviour at different carrier frequencies could be examined through the testbed at a later stage when the testbed is calibrated for target RCS measurements. In addition, data collected using different bandwidths was compared too.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Contribution of new technologies to HF surface waves radar for maritime surveillance


    Weitere Titelangaben:

    Der Beitrag neuer Techniken zum HF-Oberflächenwellenradar zur Seeüberwachung


    Beteiligte:
    Lesturgie, Marc (Autor:in) / Auffray, Gilbert (Autor:in) / Saillant, Stephane (Autor:in) / Chan, Hian Lim (Autor:in) / Goh, Xin Sui (Autor:in) / Seah, Heong Wann (Autor:in)


    Erscheinungsdatum :

    2004


    Format / Umfang :

    6 Seiten, 12 Bilder, 1 Tabelle, 7 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    MARITIME SURVEILLANCE RADAR

    MARTINEZ JOSE MARQUEZ | Europäisches Patentamt | 2021

    Freier Zugriff

    Maritime surveillance radar

    Ward, K. / Spearhead Exhibitions Limited | British Library Conference Proceedings | 1995


    MARITIME SURVEILLANCE RADAR

    MARTINEZ JOSE MARQUEZ | Europäisches Patentamt | 2024

    Freier Zugriff

    MARITIME SURVEILLANCE RADAR

    MARTINEZ JOSE MARQUEZ | Europäisches Patentamt | 2024

    Freier Zugriff

    Maritime surveillance radar

    MARTINEZ JOSE MARQUEZ | Europäisches Patentamt | 2022

    Freier Zugriff