Results 21 to 30 of about 240 (162)

Radiometric Distortion Corrected Radar Backscattering Coefficient Data over Ilam, Iran using Kompsat-5 SAR Image [PDF]

open access: yesGeo Data, 2021
Flattening gamma naught was calculated using Korea Multipurpose Satellite 5 (KOMPSAT-5, K5) by correcting the radiometric distortion caused by geometric distortion over Ilam, Iran.
Dochul Yang
doaj   +1 more source

Robustness and Actuator Bandwidth of MRP-Based Sliding Mode Control for Spacecraft Attitude Control Problems [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
Nonlinear sliding surface design in variable structure systems for spacecraft attitude control problems is studied. A robustness analysis is performed for regular form of system, and calculation of actuator bandwidth is presented by reviewing sliding ...
Jung-Hoon Keum, Sung-Woong Ra
doaj   +1 more source

A Analysis for Calibration Site Selection of SAR Satellite [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
CALVAL (Calibration & Validation) shall consider payloads characteristics because satellites have one and/or several payloads in order to perform their various missions.
Jung-Hoon Keum, Sung-Woong Ra
doaj   +1 more source

A Development of Reflector for CAL/VAL of SAR Satellite [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
The payload can be classified as a passive and active type. Generally radar satellite to acquire specific information through various radar images will use the SAR (Synthetic Aperture Radar) as active type payload.
Jung-Hoon Keum, Sung-Woong Ra
doaj   +1 more source

Dataset for Water Body Detection Using Satellite SAR Images [PDF]

open access: yesGeo Data, 2021
Satellite synthetic aperture radar (SAR) generates valid image information in all-weather. Thus, it can be effectively used for near real-time monitoring and damage analysis of flood areas which always involve overcast skies.
SeungJae Lee, Han Oh
doaj   +1 more source

Assessment of Accuracy of COSMIC and KOMPSAT Radio Occultation Temperature and Pressure [PDF]

open access: yesE3S Web of Conferences
Radio Occultation is a technique used by orbiting satellites to measure planetary atmosphere properties like temperature, pressure, and water vapor.
Descalzo Karl Philippe A.   +1 more
doaj   +1 more source

Precise Orbit Determination of LEO Satellite Using Dual-Frequency GPS Data [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
KOrea Multi-purpose SATellite (KOMPSAT)-5 will be launched at 550km altitude in 2010. Accurate satellite position (20 cm) and velocity (0.03 cm/s) are required to treat highly precise Synthetic Aperture Radar (SAR) image processing.
Yoola Hwang   +3 more
doaj   +1 more source

Applicable Tracking Data Arcs for NORAD TLE Orbit Determination of the KOMPSAT-1 Satellite Using GPS Navigation Solutions [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2005
NORAD Two Line Element (TLE) is very useful to simplify the ground station antenna pointing and mission operations. When a satellite operations facility has the capability to determine NORAD type TLE which is independent of NORAD, it is important to ...
Byoung-Sun Lee
doaj   +1 more source

Mid Frequency Shock Response Determination by Using Energy Flow Method and Time Domain Correction

open access: yesShock and Vibration, 2013
Shock induced vibration can be more crucial in the mid frequency range where the dynamic couplings with structural parts and components play important roles.
Sung-Hyun Woo, Jae-Hung Han
doaj   +1 more source

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