Article
Meteorology & Atmospheric Sciences
Quintus Kleipool, Nico Rozemeijer, Mirna van Hoek, Jonatan Leloux, Erwin Loots, Antje Ludewig, Emiel van der Plas, Daley Adrichem, Raoul Harel, Simon Spronk, Mark ter Linden, Glen Jaross, David Haffner, Pepijn Veefkind, Pieternel F. Levelt
Summary: The Ozone Monitoring Instrument (OMI), launched in 2004, is still operational and has been extended to collect data until at least 2023. A new data processor has been developed to correct for instrument degradation, resulting in improved data collection and enhanced ozone measurement capabilities.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2022)
Article
Astronomy & Astrophysics
S. Das, S. M. Bailey, M. E. Hervig, B. Thurairajah, B. T. Marshall
Summary: The Solar Occultation for Ice Experiment (SOFIE) instrument has been used to retrieve ozone profiles since 2007. This study validates the accuracy of SOFIE ozone profiles by comparing them with data from other satellite instruments. The comparisons show that SOFIE agrees well with the other data sets in the 30-70 km altitude range, but there are challenges in comparing data at high altitudes and during twilight hours.
EARTH AND SPACE SCIENCE
(2023)
Article
Environmental Sciences
Yuping Chen, Meiyuan Wang, Yijuan Yao, Chunling Zeng, Wei Zhang, Hui Yan, Ping Gao, Liya Fan, Daiqi Ye
Summary: Near surface ozone, a secondary pollutant, is mainly formed by complex photochemical reactions of volatile organic compounds (VOCs) and nitrogen oxides (NOx) in the air under sunlight. The use of FNR indicator has been applied to study ozone formation sensitivity (OFS) for taking targeted ozone pollution prevention and control measures. This study established localized FNR thresholds for four severely ozone polluted urban agglomerations in China and verified their accuracy. The results indicate significant regional dependences in the FNR threshold and provide a method to accurately diagnose regional OFS.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yuanyuan Qian, Yuhan Luo, Fuqi Si, Haijin Zhou, Taiping Yang, Dongshang Yang, Liang Xi
Summary: The study presents the first global total ozone column (TOC) results of the Environmental Trace Gases Monitoring Instrument (EMI), showcasing a high correlation with ground-based and other satellite measurements. The EMI-derived observations were able to capture significant changes in TOC, demonstrating the reliability of the DOAS method for global monitoring.
Article
Environmental Sciences
Leonie Bernet, Ian Boyd, Gerald Nedoluha, Richard Querel, Daan Swart, Klemens Hocke
Summary: Continuous assessment of stratospheric ozone changes in the southern hemisphere is crucial, with data consistency and uncertainties affecting the resulting trends. Consideration of data uncertainties and inhomogeneities is important for accurate evaluation of ozone trends.
Article
Environmental Sciences
Ka Lok Chan, Jian Xu, Sander Slijkhuis, Pieter Valks, Diego Loyola
Summary: This paper presents the retrieval of total column water vapor (TCWV) using TROPOMI satellite observations, which has been optimized and validated. The TCWV retrieval algorithm shows good agreement with other reference data sets and can provide stable and consistent results on a global scale. The algorithm has important implications for operational TCWV products and local/regional climate studies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Spectroscopy
Cheng Liang-xiao, Tao Jin-hua, Zhou Hai-jin, Yu Chao, Fan Meng, Wang Ya-peng, Wang Zhi-bao, Chen Liang-fu
Summary: This study comprehensively evaluated the irradiance and radiance data of the Environmental trace gases Monitoring Instrument (EMI), finding that using different slit functions can improve calibration accuracy and wavelength calibration is needed during trace gas retrieval. The data from EMI showed high agreement with other instruments and reference solar spectrum, indicating good quality for trace gas retrieval.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2021)
Article
Meteorology & Atmospheric Sciences
Alexandra Laeng, Thomas von Clarmann, Quentin Errera, Udo Grabowski, Shawn Honomichl
Summary: This study uses high-resolution model data to investigate the impact of distance and time separation on the variability of trace species' mixing ratios. The results show that the differences between observations are primarily caused by imperfect co-location of the measurements. The variability function is approximated using a regression function with two parameters and lookup tables are provided. A reparametrization of the variability values based on latitudinal gradients is proposed, and the seasonal independence of this function is demonstrated.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2022)
Article
Environmental Sciences
Wenhao Wang, Xiong Liu, Jianzhao Bi, Yang Liu
Summary: Estimating ground-level ozone concentrations using satellite data and machine learning models can provide valuable insights into the spatial and temporal variations of ozone levels. The study in California revealed high ozone levels in suburban Los Angeles and Southern California, while lower levels were observed in the Bay Area and along the Pacific coast.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Meteorology & Atmospheric Sciences
S. Kalluri, C. Barnet, M. Divakarla, R. Esmaili, N. Nalli, K. Pryor, T. Reale, N. Smith, C. Tan, T. Wang, J. Warner, M. Wilson, L. Zhou, T. Zhu
Summary: Infrared and microwave sounder measurements from polar-orbiting satellites are used to retrieve atmospheric profiles. These retrievals are used to assess atmospheric stability, issue forecasts and weather warnings, monitor greenhouse gases and emissions from fires, and evaluate ozone concentration in the stratosphere. The utility of these retrievals is illustrated through examples of severe thunderstorms, tropical cyclones, fires, and ozone maps.
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
(2022)
Article
Economics
David P. Byrne, Susumu Imai, Neelam Jain, Vasilis Sarafidis
Summary: This article proposes a new methodology for identifying and estimating demand in differentiated products models. The method addresses the endogeneity issues of prices and outputs by using cost data instead of instruments, and considers the unobserved market size. The effectiveness of the method is demonstrated through Monte Carlo experiments and applied to estimate deposit demand in the US banking industry.
JOURNAL OF ECONOMETRICS
(2022)
Article
Environmental Sciences
Kalliopi Koutantou, Philip Brunner, Jorge Vazquez-Cuervo
Summary: Sea Surface Temperature (SST) is vital for various oceanic processes. This study validates MODIS level-2 and MUR level-4 satellite SST products using data from eight Saildrone deployments. The results highlight the accuracy of Saildrones in validating near-shore satellite SST products and assessing their quality.
Article
Engineering, Electrical & Electronic
Andreas Colliander, Rolf Reichle, Wade Crow, Michael Cosh, Fan Chen, Steven Chan, Narendra Narayan Das, Rajat Bindlish, J. Chaubell, Seungbum Kim, Qing Liu, Peggy OaNeill, Scott Dunbar, Land Dang, John S. Kimball, Thomas Jackson, Hala Al-Jassar, Jun Asanuma, Bimal Bhattacharya, Aaron Berg, David Bosch, Laura Bourgeau-Chavez, Todd Caldwell, Jean-Christophe Calvet, Chandra Collins, Karsten Jensen, Stan Livingston, Ernesto Lopez-Baeza, Jose Martinez-Fernandez, Heather McNairn, Mahta Moghaddam, Carsten Montzka, Claudia Notarnicola, Thierry Pellarin, Isabella Greimeister-Pfeil, Jouni Pulliainen, Judith Ramos, Judith Gpe. Ramos Hernandez, Mark Seyfried, Patrick Starks, Bob Su, R. van der Velde, Yijian Zeng, Marc Thibeault, Mariette Vreugdenhil, Jeffrey Walker, Mehrez Zribi, Dara Entekhabi, Simon Yueh
Summary: The National Aeronautics and Space Administration's Soil Moisture Active Passive (SMAP) mission has been validating its soil moisture products since 2015. The results show that the SMAP products meet the mission requirements and are generally consistent with other satellite products. The validation program will continue and plans to expand to forested and high-latitude regions.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2022)
Article
Spectroscopy
Su Jing-ming, Zhao Min-jie, Zhou Hai-jin, Yang Dong-shang, Hong Yan, Si Fu-qi
Summary: The environmental trace gases monitoring instrument (EMI) is an ultraviolet-visible imaging spectrometer used to invert global atmospheric trace gas concentrations with high spatial resolution. This study analyzes the on-orbit temperature, CCD dark background noise, and spectral response function to effectively monitor and correct the performance decay of EMI.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2022)
Article
Health Care Sciences & Services
Chun-Yin Yeh, Yi-Ting Chung, Kun-Ta Chuang, Yu-Chen Shu, Hung-Yu Kao, Po-Lin Chen, Wen-Chien Ko, Nai-Ying Ko
Summary: This study validated the performance of HEARThermo, a wearable device, for continuously monitoring body surface temperatures in humans. The results showed good test-retest reliability and adequate criterion validity, with no significant difference between HEARThermo measurements and those from an infrared skin thermometer. The findings support the use of HEARThermo for continuous temperature monitoring.
JMIR MHEALTH AND UHEALTH
(2021)
Article
Environmental Sciences
Chunhui Pan, Larry Flynn
JOURNAL OF APPLIED REMOTE SENSING
(2015)
Article
Geochemistry & Geophysics
Chunhui Pan, Fuzhong Weng, T. Beck, L. Flynn, Shouguo Ding
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2017)
Article
Astronomy & Astrophysics
C. Pan, F. Weng, L. Flynn
EARTH AND SPACE SCIENCE
(2017)
Article
Geochemistry & Geophysics
Chunhui Pan, Lihang Zhou, Changyong Cao, Lawrence Flynn, Eric Beach
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2019)
Article
Optics
Gonzalo Gonzalez Abad, Amir Hossein Souri, Juseon Bak, Kelly Chance, Lawrence E. Flynn, Nickolay A. Krotkov, Lok Lamsal, Can Li, Xiong Liu, Christopher Chan Miller, Caroline R. Nowlan, Raid Suleiman, Huiqun Wang
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2019)
Article
Environmental Sciences
Cheng-Zhi Zou, Lihang Zhou, Lin Lin, Ninghai Sun, Yong Chen, Lawrence E. Flynn, Bin Zhang, Changyong Cao, Flavio Iturbide-Sanchez, Trevor Beck, Banghua Yan, Satya Kalluri, Yan Bai, Slawomir Blonski, Taeyoung Choi, Murty Divakarla, Yalong Gu, Xianjun Hao, Wei Li, Ding Liang, Jianguo Niu, Xi Shao, Larrabee Strow, David C. Tobin, Denis Tremblay, Sirish Uprety, Wenhui Wang, Hui Xu, Hu Yang, Mitchell D. Goldberg
Article
Geochemistry & Geophysics
Chunhui Pan, Banghua Yan, Changyong Cao, Lawrence Flynn, Xiaozhen Xiong, Eric Beach, Lihang Zhou
Summary: The Ozone Mapping and Profiler Suite (OMPS) Nadir Profilers (NPs) are advanced hyperspectral instruments used to measure ozone profiles in the Earth atmosphere. This article provides an analysis of the accuracy of the NP sensors' data records and discusses important aspects of their performance in relation to sensor characterization and calibration.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Remote Sensing
Jianguo Niu, Lawrence. E. Flynn, C. Trevor Beck, Zhan Zhang, Eric Beach, Zhuihua Zhang, Manik Bali
Summary: We have developed Enterprise V8TOz (EV8TOz), an expansion of the Version 8 Total Column Ozone algorithm (V8TOz), which provides a unique platform for estimating total ozone (TOz) using a variety of UV/Visible satellite measurements. EV8TOz includes flexible options for band adjustment and soft calibration, and can accommodate data from multiple satellite sensors. We have demonstrated the applications of EV8TOz to various satellite missions, including OMPS, GOME-2, and TROPOMI, and we have found that EV8TOz estimates show good agreement with NASA NPP retrievals.
REMOTE SENSING LETTERS
(2023)
Article
Geochemistry & Geophysics
Ding Liang, Banghua Yan, Lawrence Flynn
Summary: This article introduces a method to correct intersensor calibration convolution errors that occur in the convolution of spectral response functions (SRFs) between narrow-band and broad-band instruments. By using the intersensor calibration analysis between Ozone Mapping and Profiler Suite (OMPS) Nadir Mapper (NM) and Global Ozone Monitoring Experiment-2 (GOME-2) as an example, the root cause of convolution errors in the intersensor calibration is addressed. A hybrid convolution error correction method is presented and validated through simulation, showing significant improvements in reducing the convolution errors.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
Jianguo Niu, Lawrence E. Flynn, Trevor Beck, Zhihua Zhang, Eric Beach
Summary: Changing the logic switch threshold in the linear fit sulfur dioxide algorithm improved performance in the evaluation of near-real-time atmospheric SO2 retrieval. Comparing results with a principal component analysis algorithm showed that the new logic eliminated discontinuities and saturation, demonstrating a close to linear relationship with matchup data.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Proceedings Paper
Computer Science, Artificial Intelligence
Ding Liang, Banghua Yan, Ninghai Sun, Lawrence Flynn, Chunhui Pan, Trevor Beck
IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
(2020)
Proceedings Paper
Geosciences, Multidisciplinary
Chunhui Pan, Lihang Zhou, Changyong Cao, Lawrence Flynn, Satya Kalluri
2019 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2019)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
C. Pan, L. Zhou, Changyong Cao, Trevor Beck, Larry Flynn, Eric Beach
IGARSS 2018 - 2018 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
(2018)
Article
Environmental Sciences
Elizabeth C. Weatherhead, Jerald Harder, Eduardo A. Araujo-Pradere, Greg Bodeker, Jason M. English, Lawrence E. Flynn, Stacey M. Frith, Jeffrey K. Lazo, Peter Pilewskie, Mark Weber, Thomas N. Woods
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Bigyani Das, Walter Wolf, Lawrence Flynn, Maria Caponi, Trevor Beck, Zhihua Zhang, Jiangua Niu
2015 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
(2015)