Foliage-penetrating (FOPEN) radar is a relatively modern capability fo terjemahan - Foliage-penetrating (FOPEN) radar is a relatively modern capability fo Bahasa Indonesia Bagaimana mengatakan

Foliage-penetrating (FOPEN) radar i

Foliage-penetrating (FOPEN) radar is a relatively modern capability for surveillance and
earth resource monitoring. It had been well known for several decades that radar could
propagate efficiently through forests at frequencies below 1 GHz [1]. But it was not until
the 1960s that the propagation loss and clutter scattering models were effectively developed
to provide reasonable expectations that fixed and moving objects could be detected.
More importantly, the technology for effective waveform design and signal processing
was not available until the advent of coherent sources and high-speed digital processing.
The initial FOPEN radar systems were ground-based moving target indication
(MTI) systems to detect troops moving through dense jungles [2]. The coherent processing
was innovative for the time, but the systems suffered from interference from
local radio and television transmitters and effects of wind-blown clutter. An early
experiment to develop an airborne synthetic aperture radar (SAR) was successful, but
never developed into an operational system [3].
FOPEN SAR systems were developed more thoroughly starting in the early 1990s,
primarily with the objective of operation from a remotely piloted vehicle (RPV).
To provide efficient detection on these RPVs, extensive data collections were needed to
refine the foliage loss and clutter scattering models. Furthermore, algorithms for the
ultra-wide bandwidth (UWB) waveforms for SAR were required to remove the radio
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Hasil (Bahasa Indonesia) 1: [Salinan]
Disalin!
Foliage-penetrating (FOPEN) radar is a relatively modern capability for surveillance andearth resource monitoring. It had been well known for several decades that radar couldpropagate efficiently through forests at frequencies below 1 GHz [1]. But it was not untilthe 1960s that the propagation loss and clutter scattering models were effectively developedto provide reasonable expectations that fixed and moving objects could be detected.More importantly, the technology for effective waveform design and signal processingwas not available until the advent of coherent sources and high-speed digital processing.The initial FOPEN radar systems were ground-based moving target indication(MTI) systems to detect troops moving through dense jungles [2]. The coherent processingwas innovative for the time, but the systems suffered from interference fromlocal radio and television transmitters and effects of wind-blown clutter. An earlyexperiment to develop an airborne synthetic aperture radar (SAR) was successful, butnever developed into an operational system [3].FOPEN SAR systems were developed more thoroughly starting in the early 1990s,primarily with the objective of operation from a remotely piloted vehicle (RPV).To provide efficient detection on these RPVs, extensive data collections were needed torefine the foliage loss and clutter scattering models. Furthermore, algorithms for theultra-wide bandwidth (UWB) waveforms for SAR were required to remove the radio
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Hasil (Bahasa Indonesia) 2:[Salinan]
Disalin!
Dedaunan-penetrasi (fopen) radar adalah kemampuan relatif modern untuk pengawasan dan
pemantauan bumi sumber daya. Itu telah dikenal selama beberapa dekade yang radar bisa
menyebarkan efisien melalui hutan pada frekuensi di bawah 1 GHz [1]. Tapi itu tidak sampai
tahun 1960-an bahwa kehilangan propagasi dan kekacauan hamburan model yang efektif dikembangkan
untuk memberikan ekspektasi yang wajar bahwa tetap dan benda bergerak dapat dideteksi.
Lebih penting lagi, teknologi untuk desain gelombang yang efektif dan pemrosesan sinyal
tidak tersedia sampai munculnya sumber koheren dan kecepatan tinggi pengolahan digital.
Sistem radar fopen awal adalah indikasi target bergerak berbasis darat
(MTI) sistem untuk mendeteksi tentara bergerak melalui hutan lebat [2]. Pengolahan koheren
adalah inovatif untuk waktu, tetapi sistem menderita gangguan dari
pemancar radio dan televisi dan efek dari kekacauan yang tertiup angin lokal. Awal
percobaan untuk mengembangkan udara aperture sintetis radar (SAR) berhasil, tetapi
tidak pernah berkembang menjadi sistem operasional [3].
fopen sistem SAR dikembangkan lebih menyeluruh dimulai pada awal 1990-an,
terutama dengan tujuan operasi dari jarak jauh dikemudikan kendaraan (RPV).
Untuk memberikan deteksi efisien pada RPVs ini, koleksi data yang luas yang dibutuhkan untuk
memperbaiki kerugian dedaunan dan kekacauan hamburan model. Selanjutnya, algoritma untuk
bandwidth yang ultra-lebar (UWB) bentuk gelombang SAR diminta untuk menghapus radio
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