Bin Zhang , Ling Chang , Zhengbing Wang , Li Wang , Qinghua Ye , Alfred Stein
{"title":"Multi-decadal Dutch coastal dynamic mapping with multi-source remote sensing imagery","authors":"Bin Zhang , Ling Chang , Zhengbing Wang , Li Wang , Qinghua Ye , Alfred Stein","doi":"10.1016/j.jag.2025.104452","DOIUrl":"10.1016/j.jag.2025.104452","url":null,"abstract":"<div><div>Tidal flats and their associated sandbanks are dynamic environments crucial for ecological balance and biodiversity. Monitoring their evolutionary history and topographic changes is important to better understand their dynamic mechanisms and predict their future status. Accurately mapping their evolution, however, remains challenging due to highly dynamic currents, suspended sediment variability, and unclear boundaries between land, tidal flats, and water. Traditional waterline methods struggle under these conditions. In this study, we propose an Object-Based Image Segmentation (OBIS) method, specifically designed for SAR images, to extract waterlines and distinguish tidal flats and shorelines from water bodies. This method integrates SAR polarimetric feature analysis to select high-quality images and employs partition processing to preserve local feature statistics. Using 199 Sentinel-1 GRD, 132 Radarsat-2 SLC, and 157 Landsat images, we analyzed coastal dynamics in the Dutch Wadden Sea from 1986 to 2020. Our DEMs, validated against LiDAR data (2016–2019) and 58 ground anchor measuring stations (2011–2020), achieved an accuracy of 10–30 cm. Results show that coastal tidal flats and sandbanks expanded at rates of 0.107–0.324 km<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span> yr<sup>−1</sup> and 0.010–0.073 km<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span> yr<sup>−1</sup>, respectively, with a net intertidal volume increase of approximately <span><math><mrow><mn>8</mn><mo>.</mo><mn>6</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>7</mn></mrow></msup><mspace></mspace><msup><mrow><mtext>m</mtext></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span>. The generated DEMs provide valuable insights for sediment budget evaluation and hydrodynamic modeling, supporting scientific research and coastal management. The proposed OBIS-based framework demonstrates its effectiveness for mapping national-scale tidal flats and sandbanks dynamics.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104452"},"PeriodicalIF":7.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E.T. Mendoza , E. Salameh , E.I. Turki , J. Deloffre , B. Laignel
{"title":"Satellite-based flood mapping of coastal floods: The Senegal River estuary study case","authors":"E.T. Mendoza , E. Salameh , E.I. Turki , J. Deloffre , B. Laignel","doi":"10.1016/j.jag.2025.104476","DOIUrl":"10.1016/j.jag.2025.104476","url":null,"abstract":"<div><div>This study employs an integrated approach, combining remote sensing and numerical modelling techniques, to characterize flood-prone regions resulting from the combined effects of extreme river water elevations and long-term sea-level rise in the Senegal River Estuary. Four different case scenarios of hydrodynamic conditions have been investigated to provide a quantitative assessment of flooding. Simultaneously, a Land Type classification using machine learning techniques has been conducted. Subsequently, the resulting land type map has been integrated with flood mapping simulations obtaining the different land types impacted by flood dynamics. The analysis shows that the buildings classification is the most impacted followed by vegetation and roads. This study highlights the flood-affected areas at a district level, offering relevant understanding for the development of effective adaptation strategies, disaster planning, adjusting policies with scientific knowledge, and supporting adaptive governance in the Senegal River Estuary.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104476"},"PeriodicalIF":7.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Riyaaz Uddien Shaik , Mohamad Alipour , Eric Rowell , Bharathan Balaji , Adam Watts , Ertugrul Taciroglu
{"title":"FUELVISION: A multimodal data fusion and multimodel ensemble algorithm for wildfire fuels mapping","authors":"Riyaaz Uddien Shaik , Mohamad Alipour , Eric Rowell , Bharathan Balaji , Adam Watts , Ertugrul Taciroglu","doi":"10.1016/j.jag.2025.104436","DOIUrl":"10.1016/j.jag.2025.104436","url":null,"abstract":"<div><div>Accurate assessment of fuel conditions is a prerequisite for fire ignition and behavior prediction, and risk management. The method proposed herein leverages diverse data sources – including L8 optical imagery, S1 (C-band) Synthetic Aperture Radar (SAR) imagery, PL (L-band) SAR imagery, and terrain features – to capture comprehensive information about fuel types and distributions. An ensemble model was trained to predict landscape-scale fuels – such as the ’Scott and Burgan 40’ – using the as-received Forest Inventory and Analysis (FIA) field survey plot data obtained from the USDA Forest Service. However, this basic approach yielded relatively poor results due to the inadequate amount of training data. Pseudo-labeled and fully synthetic datasets were developed using generative AI approaches to address the limitations of ground truth data availability. These synthetic datasets were used for augmenting the FIA data from California to enhance the robustness and coverage of model training. The use of an ensemble of methods – including deep learning neural networks, decision trees, and gradient boosting – offered a fuel mapping accuracy of nearly 80%. Through extensive experimentation and evaluation, the effectiveness of the proposed approach was validated for regions of the 2021 Dixie and Caldor fires. Comparative analyses against high-resolution data from the National Agriculture Imagery Program (NAIP) and timber harvest maps affirmed the robustness and reliability of the proposed approach, which is capable of near-real-time fuel mapping.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104436"},"PeriodicalIF":7.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sicong He , Yanbin Yuan , Zhen Li , Heng Dong , Xiaopang Zhang , Zili Zhang , Lan Luo
{"title":"Tracking diurnal variation of NO2 at high spatial resolution in China using a time-constrained machine learning model","authors":"Sicong He , Yanbin Yuan , Zhen Li , Heng Dong , Xiaopang Zhang , Zili Zhang , Lan Luo","doi":"10.1016/j.jag.2025.104470","DOIUrl":"10.1016/j.jag.2025.104470","url":null,"abstract":"<div><div>The spatially continuous dynamic monitoring of near-surface NO<sub>2</sub> concentrations on sub-daily scales would serve to enhance awareness of the current state of air pollution, which is crucial to improving regional air quality. Satellites, like OMI and TROPOMI, are capable of observing atmospheric NO<sub>2</sub> column concentrations on a global scale. However, the fixed transit times of the satellites and severe data deficiencies restricted their applicability for revealing patterns of change in NO<sub>2</sub> on sub-daily scales. This study proposes a time-constrained XGBoost model (T-XGB) to convert multi-source information to daily cumulative near-surface NO<sub>2</sub> concentrations. Furthermore, a temporally conservative downscaling framework is developed to facilitate seamless monitoring of near-surface NO<sub>2</sub> at the 0.03°/3-hour scale in China. Evaluated with in-situ NO<sub>2</sub> measurements, the results have demonstrated the robust and excellent performance of the T-XGB (R<sup>2</sup>: 0.920–0.948; MAE: 2.89–3.67 µg/m<sup>3</sup>/h), as well as the accuracy of the temporally conserved downscaling technique (R<sup>2</sup> > 0.973). The 3-hour near-surface NO<sub>2</sub> was consistent with the TROPOMI observations at the corresponding moments and it exhibited a detailed gradient variation signature. In China, near-surface NO<sub>2</sub> exhibited a single-peak diurnal variation, with an initial increase followed by a subsequent decrease. The maximum concentration was observed between 8p.m. and 11p.m. in local time. The assessment of NO<sub>2</sub> pollution exposure can yield disparate results when evaluated at varying time scales. Sub-daily monitoring of NO<sub>2</sub> provides a more detailed and nuanced understanding of the pollutant, making it a more applicable and flexible tool for use in subsequent studies.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104470"},"PeriodicalIF":7.6,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Extracting a decadal deformation on Xiaolangdi upstream dam slope using seasonally inundated distributed scatterers InSAR (SIDS − InSAR)","authors":"Lei Xie , Wenbin Xu , Yosuke Aoki","doi":"10.1016/j.jag.2025.104462","DOIUrl":"10.1016/j.jag.2025.104462","url":null,"abstract":"<div><div>Estimating deformation at the upstream dam slope from Interferometric Synthetic Aperture Radar (InSAR) is challenging due to the complete loss of coherence in seasonally inundated upstream slope. Here, we present an improved Distributed Scatterer-InSAR method that accounts for the seasonal decorrelation of upstream dam slopes and optimizes the interferogram pair selection with inter- and multi-annual baselines. We term this novel method Seasonally Inundated Distributed Scatterer InSAR (SIDS-InSAR). We apply the method with multi-sensor InSAR observations during 2007–2023 at the Xiaolangdi Reservoir (XLD), China, including Sentinel-1, ALOS-1, and ALOS-2. The results show that a new deformation map on a 1540 <span><math><mo>×</mo></math></span> 50 m<sup>2</sup> upstream slope in XLD, and a decaying settlement of 4.7 cm/yr (2007–2010) and 2.5 cm/yr (2015–2023), with an RMSE of 0.62 cm/yr compared to the leveling measurement. Additionally, the deformation rates are heterogeneous across the dam body as 3.7, 4.2, and 3.2 cm/yr for upstream, crest, and downstream, respectively. This study demonstrates that the SIDS-InSAR method has potential to provide a more comprehensive deformation time series of dam body, especially for the leading-edge upstream slope part.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104462"},"PeriodicalIF":7.6,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Statistical models for urban growth forecasting: With application to the Baltimore–Washington area","authors":"Carlo Grillenzoni","doi":"10.1016/j.jag.2025.104451","DOIUrl":"10.1016/j.jag.2025.104451","url":null,"abstract":"<div><div>Monitoring and governing the development of cities are the major concerns of urban planners, since involve physical and social aspects, such as land use and population trends. Models for spatial growth have been developed both from the mathematical and empirical viewpoints, with the aim of forecasting and decision-making. Statistical models require regular space–time datasets that are provided by recent remote-sensing and geographic information systems (GIS). In this paper, we consider space–time autoregressive (STAR) models that can be applied to the timelapse video of land transformations available on Internet. The corresponding datasets are in the form of big 3D arrays and require fast algorithms of parameter estimation and forecasting. An extended application to a hybrid timelapse video over 200 years of urban growth of the Baltimore–Washington area is carried out. The video is built by combining remote sensing imagery, census data, historical cartography and data interpolation, and can be fitted and forecasted by adaptive STAR models, with robust and varying parameters.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104451"},"PeriodicalIF":7.6,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dukwon Bae , Dongjin Cho , Jungho Im , Cheolhee Yoo , Yeonsu Lee , Siwoo Lee
{"title":"bImproved hourly all-sky land surface temperature estimation: Incorporating the temporal variability of cloud-radiation interactions","authors":"Dukwon Bae , Dongjin Cho , Jungho Im , Cheolhee Yoo , Yeonsu Lee , Siwoo Lee","doi":"10.1016/j.jag.2025.104468","DOIUrl":"10.1016/j.jag.2025.104468","url":null,"abstract":"<div><div>Land surface temperature (LST) is an indispensable factor for comprehending of surface equilibrium state on the Earth. In particular, satellites can continuously provide LST data and support the large-scale monitoring of LST with a high temporal resolution; however, satellite data may be easily contaminated by clouds. Previous satellite-based all-sky LST reconstruction approaches have inherent limitations, such as low temporal resolution and insufficient consideration of cloud effects. Therefore, this study aims to propose a novel methodology for all-sky 2-km hourly LST reconstruction from GEO-KOMPSAT-2A (GK2A) using machine learning and timely weighted accumulated radiation to reflect the temporal variation of cloud effects. The light gradient boosting machine approach used the European Center for Medium-Range Weather Forecasts Reanalysis-Land variables (i.e., LST, 2 m air temperature, evaporation, and wind), GK2A products (i.e., short and longwave radiation, and binary cloud cover), and auxiliary variables including geographic variables as independent variables. The GK2A LST and in situ measurements were used as dependent variables. The proposed model showed robust spatial agreement with GK2A LST under clear-sky conditions when conducting five-fold spatial cross-validation, with coefficient of determination (R<sup>2</sup>) values of 0.97–0.99. In the leave one station-out cross-validation using 36 in situ data under all-sky conditions, the proposed model showed high performance with R<sup>2</sup> values of 0.86–0.97, root mean square error values of 1.42–2.60 °C, and bias values of −0.49–0.23 °C. In a comparison of the proposed model with two scenarios and previous research investigating the effect of accumulated radiation, we demonstrated that the use of accumulated radiation was effective in reconstructing cloudy-sky LST, particularly during the daytime, as evident from the variable analysis conducted through Shapley additive explanations. Using the proposed model, we successfully reconstructed a spatiotemporally seamless LST, which can serve as a fundamental dataset for hourly heat-related research, such as hourly heat flow estimation and urban heat island analysis.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104468"},"PeriodicalIF":7.6,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nica Huber , Matthias Bürgi , Christian Ginzler , Birgit Eben , Andri Baltensweiler , Bronwyn Price
{"title":"Historical habitat mapping from black-and-white aerial photography: A proof of concept for post World War II Switzerland","authors":"Nica Huber , Matthias Bürgi , Christian Ginzler , Birgit Eben , Andri Baltensweiler , Bronwyn Price","doi":"10.1016/j.jag.2025.104464","DOIUrl":"10.1016/j.jag.2025.104464","url":null,"abstract":"<div><div>Information regarding the spatial arrangement and extent of past habitats is important for understanding present biodiversity, restoration potential, and fighting extinction-debt effects. European landscapes have changed profoundly over recent decades, with the trend accelerating following World War 2. We develop a proof of concept for mapping historic habitat distribution for Switzerland from black and white aerial imagery compatible with the present-day habitat map. Recently available orthorectified 1946 aerial imagery (1 m resolution) was segmented based on spectral and shape characteristics for training areas (320–508 km<sup>2</sup>) representing the main biogeographical regions of Switzerland. Initial training data was derived by manual aerial orthoimage interpretation differentiating 15 habitat classes. A random forest model was trained to classify the segments using variables describing spectral information, image texture, segment shape, topography, climate, and anthropogenic influence. Classification accuracy was improved with additional training samples derived in a stepwise approach, applying three different sampling techniques. Highest class accuracies (producer’s and user’s accuracies ≥ 0.75) were achieved for the habitats ‘Standing water’, ‘Flowing water’, ‘Glaciers, permanent ice and snow’, and ‘Forests and other wooded land’. Particularly low user’s accuracies were found for ‘Wetlands’, ‘Hedges and tree rows’ and ‘Buildings’. The comparison to independent data further revealed minor differences in overall accuracy for the three different sampling strategies. Yet, map predictions sometimes varied substantially, indicating that the sampling strategies address different classification issues. Hence, we conclude that combining different sampling strategies for training data collection has the potential to improve the mapping, particularly in the case of multi-class classifications.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104464"},"PeriodicalIF":7.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qiang Shen , Kun Shang , Chenchao Xiao , Hongzhao Tang , Taixia Wu , Changkun Wang
{"title":"A novel hyperspectral remote sensing estimation model for surface soil texture using AHSI/ZY1-02D satellite image","authors":"Qiang Shen , Kun Shang , Chenchao Xiao , Hongzhao Tang , Taixia Wu , Changkun Wang","doi":"10.1016/j.jag.2025.104453","DOIUrl":"10.1016/j.jag.2025.104453","url":null,"abstract":"<div><div>Soil texture is an essential attribute of soil structure, which plays an important role in evaluating soil fertility and carrying out agricultural production. This study developed a novel soil texture estimation model using ZiYuan-1-02D (ZY1-02D) satellite Advanced Hyperspectral Imager (AHSI), based on the mechanism of soil spectral mixing, that enables simultaneous estimation of the three soil texture attributes (clay, silt, and sand). Study area is located in the north-eastern region of China covering 1683.31 km<sup>2</sup>. To reduce data redundancy, we used correlation analysis and Competitive Adaptive Reweighted Sampling (CARS) algorithms to select sensitive spectral features of soil texture, and excluded spectral bands that are strongly influenced by other soil physicochemical properties. Finally, the spatial distribution map and classification map of soil texture have been generated for the study area. We also used AHSI/GaoFen-5 (GF-5) satellite images to further validate the generalizability of the model. The results suggest that the model can be used in the estimation of soil texture, and the developed novel model can effectively reflect the spatial distribution characteristics of surface soil texture attributes. The <em>R</em><sup>2</sup> values of all outcomes for inverting three texture attributes were larger than 0.5, with silt exhibiting the best estimation effect (<em>R</em><sup>2</sup> = 0.79, RMSE = 6.46 %, RPD = 2.19). The Max-divergence between the estimated surface soil texture attributes based on the two satellite images (AHSI/ZY1-02D and AHSI/GF-5) and the measured data were less than 4 %. The novel spectral mixture model of soil texture is suitable for spaceborne remote sensing data and has broad application prospects in surface soil texture mapping.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104453"},"PeriodicalIF":7.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yajun Huang , Wenping Yu , Xujun Han , Jianguang Wen , Qing Xiao , Xufeng Wang , Jiayuan Lin , Zengjing Song , Dandan Li , Xiangyi Deng
{"title":"An operational Airborne-Ground Integrate observation scheme for validating land surface temperature over heterogeneous surface","authors":"Yajun Huang , Wenping Yu , Xujun Han , Jianguang Wen , Qing Xiao , Xufeng Wang , Jiayuan Lin , Zengjing Song , Dandan Li , Xiangyi Deng","doi":"10.1016/j.jag.2025.104450","DOIUrl":"10.1016/j.jag.2025.104450","url":null,"abstract":"<div><div>At present, there are more than 30 satellite remote sensing Land Surface Temperature (LST) products from kilometers to hectometers resolutions. The accuracy of these products is the key issue for further application. The validation of LST products is mainly achieved through ground observations on homogeneous surfaces, but the accuracy of satellite products on heterogeneous surfaces is also an important factor in the performance of satellite products. We proposed an integrated airborne-ground observation scheme to validate the accuracy of hectometers Landsat LST product. Firstly, in this scheme, the optimal deployment of ground observations is constructed by the prior knowledge, which is the brightness temperature from an unmanned aerial vehicle(UAV). Secondly, UAV flight which synchronization with satellite transit to obtain brightness temperature. Thirdly, the atmospheric effect between the UAV and the ground observations is corrected by the radiative transfer equation. Finally, the LST over the heterogenous land surface is validated by upscaled UAV LST. The results showed that the error between the UAV LST and the ground observations could be reduced from 3.2 K to about 0.5 K by calibrating the near-surface atmospheric effect. Besides, the validation of the LST satellite product by upscaling the UAV LST as “true values”, the results showed that the accuracy was about 1.17 K of Landsat product in heterogeneous surface, the bias was more observably with more big heterogeneity of surface which might cause by adjacent effect in Landsat products. This paper has achieved integrated airborne-space-ground observation and provided a better solution for satellite product validation on heterogeneous surfaces.</div></div>","PeriodicalId":73423,"journal":{"name":"International journal of applied earth observation and geoinformation : ITC journal","volume":"138 ","pages":"Article 104450"},"PeriodicalIF":7.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}