scholarly journals A NEW UNMANNED AERIAL VEHICLE SYNTHETIC APERTURE RADAR FOR ENVIRONMENTAL MONITORING

2012 ◽  
Vol 122 ◽  
pp. 245-268 ◽  
Author(s):  
Voon Chet Koo ◽  
Yee Kit Chan ◽  
Vetharatnam Gobi ◽  
Ming Yam Chua ◽  
Chot Hun Lim ◽  
...  
Keyword(s):  
Environmental Monitoring ◽  
Synthetic Aperture Radar ◽  
Unmanned Aerial Vehicle ◽  
Synthetic Aperture ◽  
Aerial Vehicle ◽  
Aperture Radar

scholarly journals ESTIMATION OF DATA MEMORY CAPACITY FOR CIRCULARLY POLARIZED SYNTHETIC APERTURE RADAR ONBOARD UNMANNED AERIAL VEHICLE PLATFORM (CP-SAR UAV)

2011 ◽  
Vol 7 (1) ◽  
Author(s):  
P. Rizki Akbar ◽  
J.T. Sri Sumantyo ◽  
V.C.Koo ◽  
H.Kuzel
Keyword(s):  
Synthetic Aperture Radar ◽  
Unmanned Aerial Vehicle ◽  
Early Stage ◽  
Low Cost ◽  
Image Data ◽  
Memory Capacity ◽  
Synthetic Aperture ◽  
Circularly Polarized ◽  
Aerial Vehicle ◽  
Aperture Radar

Previously only linear polarization is widely used in the Synthetic Aperture Radar(SAR) system onboard spaceborne and airborne platforms. In such linearly polarized SAR(LP-SAR) systems, Faraday rotation in the ionosphere and platform posture will contribute tothe system noise. Therefore to improve this situation, currently a novel Circularly PolarizedSynthetic Aperture Radar (CP-SAR) sensor is developed in Microwave Remote SensingLaboratory, Chiba University. Moreover, from this research, a new backscattering data basedon circularly polarized wave in the remote sensing field can be obtained. As an early stage ofthe development of this CP-SAR sensor, we built an Unmanned Aerial Vehicle (UAV)platform for testing CP-SAR sensor capabilities. In this paper, we describe the novel CP-SARsensor and the method to design CP-SAR UAV especially in estimating the requirement ofdata memory capacity. Also a smaller antenna is possible to be implemented since the 3-dBaxial ratio on antenna characteristic becomes the main parameter in this new CP-SARtechnique. Hence, a compact CP-SAR sensor onboard a small and low cost spaceborneplatform yielding a high accuracy SAR image data can be realized in the near future.

scholarly journals Synthetic Aperture Radar Imaging System for Landmine Detection Using a Ground Penetrating Radar on Board a Unmanned Aerial Vehicle

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 45100-45112 ◽  
Author(s):  
Maria Garcia Fernandez ◽  
Yuri Alvarez Lopez ◽  
Ana Arboleya Arboleya ◽  
Borja Gonzalez Valdes ◽  
Yolanda Rodriguez Vaqueiro ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Unmanned Aerial Vehicle ◽  
Ground Penetrating Radar ◽  
Imaging System ◽  
Radar Imaging ◽  
Landmine Detection ◽  
Synthetic Aperture ◽  
Aerial Vehicle ◽  
Ground Penetrating ◽  
Aperture Radar

scholarly journals Simulasi Sistem Pendeteksi Objek Pada Pesawat Dengan Menggunakan Teknologi SAR (Synthetic Aperture Radar)

2021 ◽  
Vol 3 ◽  
pp. 41-52
Author(s):  
Mohammed Ikrom Asysyakuur ◽  
Denden Mohammad Ariffin ◽  
Arief Suryadi Satyawan ◽  
Ni Nyoman Ayu Marlina ◽  
Nafisun Nufus ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Unmanned Aerial Vehicle ◽  
Synthetic Aperture ◽  
Back Projection ◽  
Aerial Vehicle ◽  
Range Migration ◽  
Aperture Radar

Untuk memetakan suatu objek berupa kontur suatu daerah akan terasa sulit jikamenggunakan sistem sensor pasif seperti kamera karena keterbatasannya untuk menembus awan, kabut dan cuaca yang tidak menentu. Oleh sebab itu diperlukannya teknologi yang lebih baik untuk dapat memetakan suatu objek dari atas permukaan bumi atau udara. Synthetic Aperture Radar (SAR) adalah teknik pemetaan dengan menggunakan radar untuk menghasilkan peta kontur bumi dengan resolusi tinggi, atau menggambarkan suatu objek serta menyajikan informasi dalam bentuk citra atau gambar. SAR dapat bekerja dalam kondisi cuaca apapun, baik dalam keadaan hujan, salju atau bahkan kabut sekalipun. Kemampuan SAR lainnya adalah untuk dapat mendeteksi objek dengan tingkat keakuratanyang cukup baik. Beradasarkan hal tersebut di atas, penelitian dan pengembangan teknologi SAR sangat diperlukan. Pada penelitian ini studi awal mengenai teknologi SAR telah dilakukan. Penelitian tersebut dimaksudkan untuk dapat melengkapi kemampuan drone atau unmanned aerial vehicle (UAV) baik untuk pencitraan kontur bumi maupun aktifitas terkait society 5.0. Sehingga aplikasinya dapat digunakan untuk keperluan pertanian modern, kehutanan, kelautan, dan kegiatan pengamatan perbatasan. Tujuannya adalah untuk mensimulasikan pendeteksian objek yang berada di permukaan tanah. Terdapat dua metoda pendeteksian objek berbasis SAR yang disimulasikan, yaitu Range Migration Algoritma dan Back Projection Algoritma. Simulasi ini dibangun dengan menggunakan komputer dengan prosesor AMD A8, memori 8 GB dan softperaware MATLAB 2019. Hasil simulasi memperlihatkan bahwa disain system untuk kedua algoritman tersebut dapat bekerja baik pada frekuensi 4 GHz dengan range resolusi 3m. Citra yang ditampilkan pada simulasi ini dalam bentuk 2-D. Sedangkan waktu pemrosesan rata-rata dari ke dua algoritma tersebut untuk dapat melakukan pendeteksian objek adalah 103.2 detik.

scholarly journals An Empirical Assessment of Temporal Decorrelation Using the Uninhabited Aerial Vehicle Synthetic Aperture Radar over Forested Landscapes

2012 ◽  
Vol 4 (4) ◽  
pp. 975-986 ◽  
Author(s):  
Marc Simard ◽  
Scott Hensley ◽  
Marco Lavalle ◽  
Ralph Dubayah ◽  
Naiara Pinto ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Synthetic Aperture ◽  
Empirical Assessment ◽  
Temporal Decorrelation ◽  
Forested Landscapes ◽  
Aerial Vehicle ◽  
Aperture Radar

scholarly journals Prototype of Dual DDS FMCW Transmitter for L-Band Synthetic Aperture Radar

2018 ◽  
Vol 4 (1) ◽  
pp. 8 ◽  
Author(s):  
E. Edwar ◽  
Achmad Munir
Keyword(s):  
Remote Sensing ◽  
Synthetic Aperture Radar ◽  
Continuous Wave ◽  
Synthetic Aperture ◽  
Analog Filter ◽  
Remote Sensing Technique ◽  
Direct Digital Synthesizer ◽  
Aerial Vehicle ◽  
L Band ◽  
Aperture Radar

One of the popular remote sensing technique is remote sensing using radar technology such as Synthetic Aperture Radar (SAR). In this paper, a compact SAR prototype transmitter was designed so it could be installed in small platform. This SAR transmitter was designed to generate a frequency modulated continuous wave (FMCW) using direct digital synthesizer (DDS) integrated with RF front end modules such as analog filter and power amplifier. The bandwidth of the radar spectrum is 10 MHz, and the carrier frequency used is 1.27 GHz. The L-Band has been chosen as the carrier signal in order to detect the target (trees). The payload was designed for aerial vehicle, hence the choice of components should be as small as possible. The FMCW-SAR transmitter was implemented by using DDS module AD9850 and integrated with another RF component. The FMCW-SAR transmitter produces the transmit power about -17.67 dBm.

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