Results 51 to 60 of about 270 (140)

Exploring the use of GPS-tracking to investigate the diet of African vultures [PDF]

, 2023
Vultures are highly mobile scavengers that cover vast distances on their daily foraging trips. Vultures display specific spatial and behavioral patterns when feeding on carcasses, and these behaviors are potentially identifiable in the tracks of ...
Mpofu, Charles
core   +1 more source

A Cloud Screening Preprocessing Framework for GOCI‐II Aerosol Optical Depth: Development and Impact on Retrieval Errors

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 1, 16 January 2026.
Abstract Accurate retrieval of satellite‐derived aerosol optical depth (AOD) is critical for air quality forecasting, especially when AOD is assimilated into models. However, if retrieval errors in the satellite‐derived AOD are not corrected or characterized, they can lead to false analysis increments and ultimately degrade the quality of data ...
Joonhee Kim, Ukkyo Jeong, Sang‐Woo Kim, Yonghee Lee, Taehee Kim, Hyeong‐Ahn Kwon, Sang‐Moo Lee   +6 more
wiley   +1 more source

Comprehensive Analysis of Bias in TEMPO NO2 Column Densities Through Pandora Observations

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 15, 16 August 2025.
Abstract Tropospheric Emissions: Monitoring of Pollution (TEMPO) is the first geostationary satellite instrument to monitor air pollutants across North America. This study uses Pandora observations to analyze the bias in TEMPO Level‐3 total column density of NO2 (TOTNO2) from August 2023 to December 2024.
Masoud Ghahremanloo, Caroline Nowlan, Gonzalo González Abad, Cecilia Garraffo, Xiong Liu, Huiqun Wang, Barron Henderson, Eric Baumann, Lukas Valin, Jeffrey A. Geddes, Xiaoyi Zhao   +10 more
wiley   +1 more source

Characteristics of Orbit Determination with Short‐Arc Observation by an Optical Tracking Network, OWL‐Net

International Journal of Aerospace Engineering, Volume 2018, Issue 1, 2018., 2018
An optical tracking network, the Optical Wide‐field patroL Network (OWL‐Net), has been developed to maintain the orbital ephemeris of 11 domestic low Earth orbit satellites. The schedule overlapped events were occurred in the scheduling of the OWL‐Net with reduction of the optical observation chances.
Jin Choi, Jung Hyun Jo, Kyung-Min Roh, Hong-Suh Yim, Eun-Jung Choi, Sungki Cho, Yue Wang   +6 more
wiley   +1 more source

KOMPSAT-3/3A Image-text Dataset for Training Large Multimodal Models [PDF]

Geo Data
This study aims to improve the accuracy and interpretability of large multimodal models (LMMs) specialized in satellite image analysis by constructing an image-text dataset based on KOMPSAT-3/3A imagery and presenting the results of training using this ...
Han Oh, Dong-Bin Shin, Dae-Won Chung
doaj   +1 more source

Using Monte Carlo simulation to improve the performance of semivariograms for choosing the remote sensing imagery resolution for natural resource surveys: Case study on three counties in East, Central, and West China [PDF]

, 2018
© 2018 by the author. Semivariograms have been widely used in research to obtain optimal resolutions for ground features. To obtain the semivariogram curve and its attributes (range and sill), parameters including sample size (SS), maximum distance (MD),
Atkinson, Baatz, Han, He, Kim, Liu, Robert, Saturno, Shen, Webster, Wen, Yang, Zhou, Zhu   +13 more
core   +2 more sources

Airborne and Spaceborne Mapping and Analysis of the Subglacial Lake D2 in David Glacier, Terra Nova Bay, Antarctica

Journal of Geophysical Research: Earth Surface, Volume 130, Issue 6, June 2025.
Abstract During the 2018–2019 Antarctic summer, the Korea Polar Research Institute and the University of Texas Institute for Geophysics collaborated on a helicopter‐based ice‐penetrating radar (IPR) survey over the active subglacial lake D2 (SLD2), located in the midstream of the David Glacier, Terra Nova Bay, Antarctica.
Hyeontae Ju, Seung‐Goo Kang, Hyangsun Han, Lucas H. Beem, Gregory Ng, Kristian Chan, Taewook Kim, Joohan Lee, Jongik Lee, Yeadong Kim, Sukjoon Pyun   +10 more
wiley   +1 more source

Research Trend Analysis of Geospatial Information in South Korea Using Text‐Mining Technology

Journal of Sensors, Volume 2017, Issue 1, 2017., 2017
The purpose of this study was to analyze geospatial information (GI) research trends using text‐mining techniques. Data were collected from 869 papers found in the Korea Citation Index (KCI) database (DB). Keywords extracted from these papers were classified into 13 GI domains and 13 research domains.
Kwan-Young Oh, Moung-Jin Lee, Lei Zhang
wiley   +1 more source

Historical rainstorm in Hong Kong on 7–8 September 2023: Diagnosis, forecasting and nowcasting

Atmospheric Science Letters, Volume 26, Issue 1, January 2025.
Past 24‐h rainfall analysis over Hong Kong ending at 1600 Hong Kong Time (HKT) on 8 September 2023, the historical rainstorm. Abstract On 7–8 September 2023, Hong Kong was hit by a historical and record‐breaking rainstorm associated with the remnant of Tropical Cyclone Haikui (2311).
Hiu Ching Tam, Yu‐Heng He, Pak Wai Chan, Shiwei Yu, Huisi Mo, Hui Su, Ling‐Feng Hsiao, Yangzhao Gong   +7 more
wiley   +1 more source

Orthorectification of KOMPSAT Optical Images Using Various Ground Reference Data and Accuracy Assessment

Journal of Sensors, Volume 2017, Issue 1, 2017., 2017
Along with the appearance of high resolution satellite images, image correction using Rational Polynomial Coefficients (RPCs) has become common. Location accuracy of Korea Multipurpose Satellite (KOMPSAT) standard images is still not adequate, so, in order to leverage the KOMPSAT images for applications such as mapping and change detection, it is ...
Kwangjae Lee, Eunseon Kim, Younsoo Kim, Saro Lee   +3 more
wiley   +1 more source