Results 21 to 30 of about 2,974 (193)

Registration and Combined Adjustment for the Laser Altimetry Data and High-Resolution Optical Stereo Images of the GF-7 Satellite

Remote Sensing, 2022
The GF-7 satellite is China’s first civil sub-meter resolution stereo mapping satellite, aiming at 1:10,000-scale mapping. To achieve this goal, apart from the stereo optical cameras that reach sub-meter resolution, the GF-7 satellite is equipped with a ...
Jiyi Chen, Xinming Tang, Yucai Xue, Guoyuan Li, Xiaoqing Zhou, Liuru Hu, Shuaitai Zhang   +6 more
doaj   +1 more source

The certitude of a global sea level acceleration during the satellite altimeter era

Journal of Geodetic Science, 2020
Recent studies reported a uniform global sea level acceleration during the satellite altimetry era (1993–2017) by analyzing globally averaged satellite altimetry measurements.
İz H. Bâki, Shum C.K.
doaj   +1 more source

Evaluation of Marine Gravity Anomaly Calculation Accuracy by Multi-Source Satellite Altimetry Data

Frontiers in Earth Science, 2021
The purpose of this paper is to analyze the influence of satellite altimetry data accuracy on the marine gravity anomaly accuracy. The data of 12 altimetry satellites in the research area (5°N–23°N, 105°E–118°E) were selected.
Shanwei Liu, Yinlong Li, Qinting Sun, Jianhua Wan, Yue Jiao, Jinghui Jiang   +5 more
doaj   +1 more source

Determination of Long-Term (1993–2019) Sea Level Rise Trends Around the Korean Peninsula Using Ocean Tide-Corrected, Multi-Mission Satellite Altimetry Data

Frontiers in Marine Science, 2022
It is vital to improve estimations of long-term trends in global and regional sea level rise to help mitigate and adapt to climate change. Satellite altimetry data have been widely used for this purpose; however, data collected in regions with strong ...
KyungJae Lee, SungHyun Nam, SungHyun Nam, Yang-Ki Cho, Yang-Ki Cho, Kwang-Young Jeong, Do-Seong Byun   +6 more
doaj   +1 more source

Sea level change along the Black Sea coast from satellite altimetry, tide gauge and GPS observations

Geodesy and Geodynamics, 2016
Sea level change affects human living conditions, particularly ocean coasts. However, sea level change is still unclear along the Black Sea coast due to lack of in-situ measurements and low resolution satellite data. In this paper, sea level change along
Nevin B. Avsar, Shuanggen Jin, Hakan Kutoglu, Gokhan Gurbuz   +3 more
doaj   +1 more source

Satellite altimetry and ocean dynamics [PDF]

Comptes Rendus. Géoscience, 2006
This paper provides a summary of recent results derived from satellite altimetry. It is focused on altimetry and ocean dynamics with synergistic use of other remote sensing techniques, in-situ data and integration aspects through data assimilation. Topics include mean ocean circulation and geoid issues, tropical dynamics and large-scale sea level and ...
Fu, Lee Lueng, Le Traon, Pierre-yves
openaire   +2 more sources

Satellite altimetry for Indian reservoirs

Water Science and Engineering, 2021
Satellite radar altimetry has immense potential for monitoring fresh surface water resources and predicting the intra-seasonal, seasonal, and inter-annual variability of inundated surface water over large river basins. As part of the Preparation for the Surface Water and Ocean Topography mission scheduled for launch in mid-2022, the present study aimed
Verma, K., Nair, A. S., Jayaluxmi, I., Karmakar, S., /Calmant, Stéphane   +4 more
openaire   +4 more sources

Sea Surface Height Estimation by Ground-Based BDS GEO Satellite Reflectometry

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Chinese BeiDou Navigation Satellite System (BDS) as a mixed constellation consists of not only medium earth orbit (MEO) satellites but also inclined geosynchronous orbit and geostationary earth orbit (GEO) satellites, of which the GEO satellites remain ...
Jianming Wu, Yanling Chen, Fan Gao, Peng Guo, Xiaoya Wang, Xinliang Niu, Mengjie Wu, Naifeng Fu   +7 more
doaj   +1 more source

A new approach to estimate ice dynamic rates using satellite observations in East Antarctica [PDF]

The Cryosphere, 2017
Mass balance changes of the Antarctic ice sheet are of significant interest due to its sensitivity to climatic changes and its contribution to changes in global sea level. While regional climate models successfully estimate mass input due to snowfall,
B. Kallenberg, P. Tregoning, J. F. Hoffmann, R. Hawkins, A. Purcell, S. Allgeyer   +5 more
doaj   +1 more source

Deep Reinforcement Learning Based Autonomous Decision‐Making for Cooperative Uncrewed Aerial Vehicles: A Search and Rescue Real World Application

Journal of Field Robotics, EarlyView.
ABSTRACT This paper presents the first end‐to‐end framework that combines guidance, navigation, and centralized task allocation for multiple UAVs performing autonomous search‐and‐rescue (SAR) in GNSS‐denied indoor environments. A twin delayed deep deterministic policy gradient controller is trained with an artificial potential field (APF) reward that ...
Thomas Hickling, Maxwell Hogan, Abdulla Tammam, Nabil Aouf   +3 more
wiley   +1 more source