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635 Results Found

  • Article
  • Open Access
34 Citations
5,884 Views
20 Pages

9 May 2019

This study conducted the first comprehensive assessment of the aerosol optical depth (AOD) product retrieved from the observations by the Advanced Himawari Imager (AHI) onboard the Himawari-8 satellite. The AHI Level 3 AOD (Version 3.0) was evaluated...

  • Letter
  • Open Access
26 Citations
5,915 Views
12 Pages

First Provisional Land Surface Reflectance Product from Geostationary Satellite Himawari-8 AHI

  • Shuang Li,
  • Weile Wang,
  • Hirofumi Hashimoto,
  • Jun Xiong,
  • Thomas Vandal,
  • Jing Yao,
  • Lexiang Qian,
  • Kazuhito Ichii,
  • Alexei Lyapustin and
  • Yujie Wang
  • + 1 author

12 December 2019

A provisional surface reflectance (SR) product from the Advanced Himawari Imager (AHI) on-board the new generation geostationary satellite (Himawari-8) covering the period between July 2015 and December 2018 is made available to the scientific commun...

  • Article
  • Open Access
10 Citations
3,551 Views
31 Pages

Evaluation of BRDF Information Retrieved from Time-Series Multiangle Data of the Himawari-8 AHI

  • Xiaoning Zhang,
  • Ziti Jiao,
  • Changsen Zhao,
  • Jing Guo,
  • Zidong Zhu,
  • Zhigang Liu,
  • Yadong Dong,
  • Siyang Yin,
  • Hu Zhang and
  • Lei Cui
  • + 3 authors

29 December 2021

Recently, much attention has been given to using geostationary Earth orbit (GEO) meteorological satellite data for retrieving land surface parameters due to their high observation frequencies. However, their bidirectional reflectance distribution fun...

  • Article
  • Open Access
61 Citations
10,939 Views
16 Pages

23 February 2016

The Advanced Himawari Imager (AHI) on-board Himawari-8, which was launched on 7 October 2014, is the first geostationary instrument housed with a solar diffuser to provide accurate onboard calibrated data for the visible and near-infrared (VNIR) band...

  • Article
  • Open Access
3 Citations
4,252 Views
20 Pages

4 May 2023

The use of geostationary meteorological satellites for land remote sensing has attracted much attention after the launch of the Himawari-8 satellite equipped with a sensor with enhanced land observation capabilities. In the context of land remote sen...

  • Article
  • Open Access
25 Citations
6,545 Views
22 Pages

Seasonal Comparisons of Himawari-8 AHI and MODIS Vegetation Indices over Latitudinal Australian Grassland Sites

  • Ngoc Nguyen Tran,
  • Alfredo Huete,
  • Ha Nguyen,
  • Ian Grant,
  • Tomoaki Miura,
  • Xuanlong Ma,
  • Alexei Lyapustin,
  • Yujie Wang and
  • Elizabeth Ebert

3 August 2020

The Advanced Himawari Imager (AHI) on board the Himawari-8 geostationary (GEO) satellite offers comparable spectral and spatial resolutions as low earth orbiting (LEO) sensors such as the Moderate Resolution Imaging Spectroradiometer (MODIS) and Visi...

  • Article
  • Open Access
33 Citations
6,153 Views
19 Pages

Generation and Evaluation of LAI and FPAR Products from Himawari-8 Advanced Himawari Imager (AHI) Data

  • Yepei Chen,
  • Kaimin Sun,
  • Chi Chen,
  • Ting Bai,
  • Taejin Park,
  • Weile Wang,
  • Ramakrishna R. Nemani and
  • Ranga B. Myneni

27 June 2019

Leaf area index (LAI) and fraction of photosynthetically active radiation (FPAR) absorbed by vegetation are two of the essential biophysical variables used in most global models of climate, hydrology, biogeochemistry, and ecology. Most LAI/FPAR produ...

  • Article
  • Open Access
15 Citations
4,566 Views
21 Pages

Himawari-8/AHI Aerosol Optical Depth Detection Based on Machine Learning Algorithm

  • Yuanlin Chen,
  • Meng Fan,
  • Mingyang Li,
  • Zhongbin Li,
  • Jinhua Tao,
  • Zhibao Wang and
  • Liangfu Chen

21 June 2022

Due to the advantage of geostationary satellites, Himawari-8/AHI can provide near-real-time air quality monitoring over China with a high temporal resolution. Satellite-based aerosol optical depth (AOD) retrieval over land is a challenge because of t...

  • Article
  • Open Access
21 Citations
7,199 Views
13 Pages

1 March 2016

Clear-sky brightness temperatures (BT) in five bands of the Advanced Himawari Imager (AHI; flown onboard Himawari-8 satellite) centered at 3.9, 8.6, 10.4, 11.2, and 12.3 µm (denoted by IR37, IR86, IR10, IR11, and IR12, respectively) are used in the N...

  • Article
  • Open Access
6 Citations
1,727 Views
16 Pages

19 June 2024

Aerosols exert a significant influence on the brightness temperature observed in the thermal infrared (IR) channels, yet the specific contributions of various aerosol types remain underexplored. This study integrated the Copernicus Atmosphere Monitor...

  • Article
  • Open Access
1 Citations
3,135 Views
19 Pages

20 November 2021

The Advanced Himawari Imager (AHI) aboard the Himawari-8, a new generation of geostationary meteorological satellite, has high-frequency observation, which allows it to effectively capture atmospheric variations. In this paper, we have proposed an Im...

  • Communication
  • Open Access
2 Citations
2,253 Views
7 Pages

A Direct Method for the Estimation of Top-of-Atmosphere Outgoing Longwave Radiation from Himawari-8/AHI Data

  • Chuan Zhan,
  • Yazhen Jiang,
  • Yong Chen,
  • Zuohua Miao,
  • Xiangyang Zeng and
  • Jun Li

11 November 2022

Top-of-atmosphere (TOA) outgoing longwave radiation (OLR), a key component of the Earth’s energy budget, serves as a diagnostic of the Earth’s climate system response to incoming solar radiation. However, existing products are typically e...

  • Article
  • Open Access
57 Citations
9,180 Views
19 Pages

19 January 2018

This paper presents a new algorithm to retrieve the aerosol optical depth (AOD) from a Himawari-8 Advanced Himawari Imager (AHI). Six typical aerosol models that derived from the long-term ground-based observations of East Asia are used in AOD retrie...

  • Article
  • Open Access
6 Citations
1,946 Views
16 Pages

12 September 2022

Observation bias and error characteristics are the preconditions for the effective assimilation of observation data. In this paper, the bias and error characteristics of the AHI (Advanced Himawari Imager (AHI) and AGRI (Multi-Channel Advanced Geostat...

  • Communication
  • Open Access
6 Citations
2,483 Views
13 Pages

1 September 2022

The FY-3E/HIRAS-II (Hyperspectral Infrared Atmospheric Sounder-II), as an infrared hyperspectral instrument onboard the world’s first early morning polar-orbiting satellite, plays a major role in improving the accuracy and timeliness of global...

  • Article
  • Open Access
18 Citations
4,928 Views
23 Pages

Snow-Covered Area Retrieval from Himawari–8 AHI Imagery of the Tibetan Plateau

  • Gongxue Wang,
  • Lingmei Jiang,
  • Jiancheng Shi,
  • Xiaojing Liu,
  • Jianwei Yang and
  • Huizhen Cui

16 October 2019

Daily snow-covered area retrieval using the imagery in solar reflective bands often encounters extensive data gaps caused by cloud obscuration. With the inception of geostationary satellites carrying advanced multispectral imagers of high temporal re...

  • Article
  • Open Access
20 Citations
7,956 Views
25 Pages

Retrieval of Reflected Shortwave Radiation at the Top of the Atmosphere Using Himawari-8/AHI Data

  • Sang-Ho Lee,
  • Bu-Yo Kim,
  • Kyu-Tae Lee,
  • Il-Sung Zo,
  • Hyun-Seok Jung and
  • Se-Hun Rim

1 February 2018

This study developed a retrieval algorithm for reflected shortwave radiation at the top of the atmosphere (RSR). This algorithm is based on Himawari-8/AHI (Advanced Himawari Imager) whose sensor characteristics and observation area are similar to the...

  • Article
  • Open Access
38 Citations
7,153 Views
19 Pages

14 May 2018

The Himawari-8 geostationary weather satellite, which is an Earth observing satellite launched in October 2014, has been applied in climate, environment, and air quality studies. Using hourly observation data from the Advanced Himawari Imager (AHI) o...

  • Technical Note
  • Open Access
8 Citations
2,369 Views
15 Pages

23 August 2023

The Fengyun-4A (FY-4A) satellite is a new-generation geostationary meteorological satellite developed by China. The advanced geosynchronous radiation imager (AGRI), one of the key payloads onboard FY-4A, can monitor sea surface temperature (SST). Thi...

  • Article
  • Open Access
877 Views
18 Pages

14 April 2025

Atmospheric aerosols play an important role in the ecological environment, climate change, and human health. Aerosol optical depth (AOD) is the main measurement of aerosols. The next-generation geostationary satellite Himawari-8, loaded with the Adva...

  • Article
  • Open Access
18 Citations
6,215 Views
17 Pages

11 March 2019

In this study, Himawari-8 Advanced Himawari Imager (AHI) longwave channel data that is sensitive to clouds and absorption gas were used to improve the accuracy of the algorithm used to calculate outgoing longwave radiation (OLR) at the top of the atm...

  • Article
  • Open Access
15 Citations
4,273 Views
14 Pages

25 December 2022

The early detection and rapid extinguishing of forest fires are effective in reducing their spread. Based on the MODIS Thermal Anomaly (MOD14) algorithm, we propose an early stage fire detection method from low-spatial-resolution but high-temporal-re...

  • Article
  • Open Access
21 Citations
4,876 Views
28 Pages

13 August 2020

An operational split-window (SW) algorithm was developed to retrieve high-temporal-resolution land surface temperature (LST) from global geostationary (GEO) satellite data. First, the MODTRAN 5.2 and SeeBor V5.0 atmospheric profiles were used to esta...

  • Article
  • Open Access
3 Citations
4,328 Views
22 Pages

Development of Geo-KOMPSAT-2A Algorithm for Sea-Ice Detection Using Himawari-8/AHI Data

  • Donghyun Jin,
  • Sung-Rae Chung,
  • Kyeong-Sang Lee,
  • Minji Seo,
  • Sungwon Choi,
  • Noh-Hun Seong,
  • Daeseong Jung,
  • Suyoung Sim,
  • Jinsoo Kim and
  • Kyung-Soo Han

14 July 2020

Sea ice is an important meteorological factor affecting the global climate system, but it is difficult to observe in sea ice ground truth data because of its location mainly at high latitudes and in polar regions. Accordingly, sea-ice detection resea...

  • Article
  • Open Access
65 Citations
6,655 Views
18 Pages

24 July 2019

Total precipitable water (TPW), a column of water vapor content in the atmosphere, provides information on the spatial distribution of moisture. The high-resolution TPW, together with atmospheric stability indices such as convective available potenti...

  • Article
  • Open Access
4 Citations
2,607 Views
17 Pages

13 January 2023

The advanced imagers onboard the new generation of geostationary satellites could provide multilayer atmospheric moisture information with unprecedented high spatial and temporal resolutions, while the physical retrieval algorithm (One-Dimensional Va...

  • Article
  • Open Access
38 Citations
5,961 Views
22 Pages

Estimation of Surface Downward Shortwave Radiation over China from Himawari-8 AHI Data Based on Random Forest

  • Ning Hou,
  • Xiaotong Zhang,
  • Weiyu Zhang,
  • Yu Wei,
  • Kun Jia,
  • Yunjun Yao,
  • Bo Jiang and
  • Jie Cheng

3 January 2020

Downward shortwave radiation (RS) drives many processes related to atmosphere–surface interactions and has great influence on the earth’s climate system. However, ground-measured RS is still insufficient to represent the land surface, so...

  • Article
  • Open Access
12 Citations
5,954 Views
13 Pages

The Influence of AHI1 Variants on the Diagnosis and Treatment Outcome in Schizophrenia

  • Stefano Porcelli,
  • Chi-Un Pae,
  • Changsu Han,
  • Soo-Jung Lee,
  • Ashwin A. Patkar,
  • Prakash S. Masand,
  • Beatrice Balzarro,
  • Siegfried Alberti,
  • Diana De Ronchi and
  • Alessandro Serretti

22 January 2015

The present study aimed to explore whether four single nucleotide polymorphisms (SNPs) within the AHI1 gene could be associated with schizophrenia (SCZ) and whether they could predict the clinical outcomes in SCZ patients treated with antipsychotics....

  • Article
  • Open Access
43 Citations
6,221 Views
18 Pages

Himawari-8/AHI and MODIS Aerosol Optical Depths in China: Evaluation and Comparison

  • Tingting Jiang,
  • Bin Chen,
  • Karen Kie Yan Chan and
  • Bing Xu

28 April 2019

The geostationary earth orbit satellite—Himawari-8 loaded with the Advanced Himawari Imager (AHI) has greatly enhanced our capacity of dynamic monitoring in Asia–Pacific area. The Himawari-8/AHI hourly aerosol product is a promising compl...

  • Article
  • Open Access
5 Citations
2,879 Views
14 Pages

8 August 2022

For many years, the Advanced Very High-Resolution Radiometer (AVHRR) and Moderate Resolution Imaging Spectroradiometer (MODIS) instruments have been widely used to monitor the condition of surface vegetation. Since the polar-orbiting satellite provid...

  • Article
  • Open Access
25 Citations
5,540 Views
16 Pages

Evaluation of JAXA Himawari-8-AHI Level-3 Aerosol Products over Eastern China

  • Ding Li,
  • Kai Qin,
  • Lixin Wu,
  • Jian Xu,
  • Husi Letu,
  • Bin Zou,
  • Qin He and
  • Yifei Li

22 April 2019

A novel geostationary satellite, the H8/AHI (Himawari-8/Advanced Himawari Imager), greatly improved the scan times per day covering East Asia, and the operational products have been stably provided for a period of time. Currently, atmospheric aerosol...

  • Article
  • Open Access
46 Citations
5,030 Views
16 Pages

Evaluation of Himawari-8/AHI, MERRA-2, and CAMS Aerosol Products over China

  • Taixin Zhang,
  • Lin Zang,
  • Feiyue Mao,
  • Youchuan Wan and
  • Yannian Zhu

25 May 2020

Reliable aerosol optical depth (AOD) data with high spatial and temporal resolutions are needed for research on air pollution in China. AOD products from the Advanced Himawari Imager (AHI) onboard the geostationary Himawari-8 satellite and reanalysis...

  • Article
  • Open Access
50 Citations
9,575 Views
20 Pages

Dust Detection and Intensity Estimation Using Himawari-8/AHI Observation

  • Lu She,
  • Yong Xue,
  • Xihua Yang,
  • Jie Guang,
  • Ying Li,
  • Yahui Che,
  • Cheng Fan and
  • Yanqing Xie

21 March 2018

In this study, simple dust detection and intensity estimation methods using Himawari-8 Advanced Himawari Imager (AHI) data are developed. Based on the differences of thermal radiation characteristics between dust and other typical objects, brightness...

  • Article
  • Open Access
17 Citations
5,011 Views
16 Pages

Comparison of Himawari-8 AHI SST with Shipboard Skin SST Measurements in the Australian Region

  • Minglun Yang,
  • Lei Guan,
  • Helen Beggs,
  • Nicole Morgan,
  • Yukio Kurihara and
  • Misako Kachi

13 April 2020

Sea surface temperature (SST) measurements from the geostationary satellite Himawari-8 Advanced Himawari Imager (AHI) are compared with in situ skin SSTs derived from shipboard Infrared SST Autonomous Radiometers (ISAR) in the Australian region. The...

  • Systematic Review
  • Open Access
4 Citations
2,885 Views
13 Pages

The Effect of Bite Raise on AHI Values in Adult Patients Affected by OSA: A Systematic Review with Meta-Regression

  • Maria Lavinia Bartolucci,
  • Serena Incerti Parenti,
  • Francesco Bortolotti,
  • Giulia Corazza,
  • Livia Solidoro,
  • Corrado Paganelli and
  • Giulio Alessandri-Bonetti

23 May 2023

Obstructive sleep apnea (OSA) is a highly prevalent sleep breathing disorder characterized by the collapse of the pharyngeal walls that entails recurrent episodes of cessation of breathing or decrease in airflow while sleeping. This results in sleep...

  • Article
  • Open Access
44 Citations
8,367 Views
20 Pages

12 December 2018

We developed land surface temperature (LST) retrieval algorithms based on the time of day and water vapor content using the Himawari-8/AHI (Advanced Himawari Imager) data, which is the Japanese next generation geostationary satellite. To develop the...

  • Article
  • Open Access
22 Citations
3,909 Views
23 Pages

A Data Fusion Method for Generating Hourly Seamless Land Surface Temperature from Himawari-8 AHI Data

  • Shengyue Dong,
  • Jie Cheng,
  • Jiancheng Shi,
  • Chunxiang Shi,
  • Shuai Sun and
  • Weihan Liu

16 October 2022

High temporal resolution and spatially complete (seamless) land surface temperature (LST) play a crucial role in numerous geoscientific aspects. This paper proposes a data fusion method for producing hourly seamless LST from Himawari-8 Advanced Himaw...

  • Communication
  • Open Access
6 Citations
2,053 Views
12 Pages

29 November 2022

The biological response triggered by a tropical cyclone (TC) passage has attracted much attention due to its possible impacts on regional oceanic, ecological environment, and regional climate balance. However, the detailed progress of TC-induced chlo...

  • Communication
  • Open Access
7 Citations
3,321 Views
9 Pages

26 May 2022

The purpose of this research was to derive and evaluate fire radiative power (FRP) values for real-time Biogeographical Region and Individual Geostationary HHMMSS Threshold (BRIGHT)/Advanced Himawari Imager (AHI) hotspots. While BRIGHT/AHI hotspots w...

  • Article
  • Open Access
63 Citations
7,812 Views
25 Pages

AHI/Himawari-8 Yonsei Aerosol Retrieval (YAER): Algorithm, Validation and Merged Products

  • Hyunkwang Lim,
  • Myungje Choi,
  • Jhoon Kim,
  • Yasuko Kasai and
  • Pak Wai Chan

Himawari-8, a next-generation geostationary meteorological satellite, was successfully launched by the Japanese Meteorological Agency (JMA) on 7 October 2014 and has been in official operation since 7 July 2015. The Advanced Himawari Imager (AHI) onb...

  • Article
  • Open Access
14 Citations
4,913 Views
29 Pages

Estimating Fire Background Temperature at a Geostationary Scale—An Evaluation of Contextual Methods for AHI-8

  • Bryan Hally,
  • Luke Wallace,
  • Karin Reinke,
  • Simon Jones,
  • Chermelle Engel and
  • Andrew Skidmore

28 August 2018

An integral part of any remotely sensed fire detection and attribution method is an estimation of the target pixel’s background temperature. This temperature cannot be measured directly independent of fire radiation, so indirect methods must be used...

  • Article
  • Open Access
10 Citations
5,848 Views
13 Pages

Upper Airway Flow Dynamics in Obstructive Sleep Apnea Patients with Various Apnea-Hypopnea Index

  • Shengmao Lin,
  • Thyagaseely Sheela Premaraj,
  • Peshala T. Gamage,
  • Pengfei Dong,
  • Sundaralingam Premaraj and
  • Linxia Gu

19 July 2022

Background and aim: This study evaluates the upper airway flow characteristics, anatomical features and analyzes their correlations with AHI in patients with varied degrees of OSA severity seeking for discernments of the underlying pathophysiological...

  • Article
  • Open Access
9 Citations
4,492 Views
10 Pages

Association of Heart Rate Variability with Obstructive Sleep Apnea in Adults

  • Yen-Chang Lin,
  • Jui-Kun Chiang,
  • Chih-Ming Lu and
  • Yee-Hsin Kao

27 February 2023

Background and Objectives: Heart rate variability (HRV) analysis is a noninvasive method used to examine autonomic system function, and the clinical applications of HRV analysis have been well documented. The aim of this study is to investigate the a...

  • Article
  • Open Access
1,341 Views
14 Pages

18 June 2025

In practice, many patients receive APAP treatment for the simple reason that it provides increased comfort and is easier for patients to accept and tolerate. Reality has proven that we have very many patients diagnosed with OSAS on APAP treatment, un...

  • Article
  • Open Access
3 Citations
2,765 Views
19 Pages

27 September 2021

Assimilation of high-resolution geostationary satellite data is of great value for precise precipitation prediction in regional basins. The operational geostationary satellite imager carried by the Himawari-8 satellite, Advanced Himawari Imager (AHI)...

  • Article
  • Open Access
5 Citations
3,282 Views
15 Pages

7 October 2020

The current generation of geostationary weather satellite instruments, such as the Advanced Baseline Imagers (ABIs) on board the US NOAA GOES 16 and 17 satellites and the Advanced Himawari Imagers (AHIs) on board the Japanese Himawari-8/9 satellites,...

  • Article
  • Open Access
11 Citations
4,390 Views
9 Pages

Snoring Index and Neck Circumference as Predictors of Adult Obstructive Sleep Apnea

  • Jui-Kun Chiang,
  • Yen-Chang Lin,
  • Chih-Ming Lu and
  • Yee-Hsin Kao

15 December 2022

Background. Snoring is the cardinal symptom of obstructive sleep apnea (OSA). The acoustic features of snoring sounds include intra-snore (including snoring index [SI]) and inter-snore features. However, the correlation between snoring sounds and the...

  • Article
  • Open Access
6 Citations
796 Views
7 Pages

Influence of Neck Circumference and Body Mass Index on Obstructive Sleep Apnoea Severity in Males

  • Robert Pływaczewski,
  • Przemysław Bieleń,
  • Michał Bednarek,
  • Luiza Jonczak,
  • Dorota Górecka and
  • Paweł Śliwiński

17 September 2008

Introduction: Obesity and male gender are the main risk factors for the development of obstructive sleep apnoea (OSA); however, some epidemiological data has shown that neck circumference (NC) ≥ 43 cm is a better predictor of obstructive event freque...

  • Article
  • Open Access
14 Citations
7,798 Views
19 Pages

Comparison of Aqua/Terra MODIS and Himawari-8 Satellite Data on Cloud Mask and Cloud Type Classification Using Split Window Algorithm

  • Babag Purbantoro,
  • Jamrud Aminuddin,
  • Naohiro Manago,
  • Koichi Toyoshima,
  • Nofel Lagrosas,
  • Josaphat Tetuko Sri Sumantyo and
  • Hiroaki Kuze

9 December 2019

Cloud classification is not only important for weather forecasts, but also for radiation budget studies. Although cloud mask and classification procedures have been proposed for Himawari-8 Advanced Himawari Imager (AHI), their applicability is still...

  • Article
  • Open Access
2 Citations
3,380 Views
9 Pages

Implementation of the Baveno Classification in Obstructive Sleep Apnea and Its Correlation with Symptoms of Anxiety and Depression

  • Romana Suša,
  • Miloš Ratinac,
  • Vojislav Ćupurdija,
  • Ljiljana Novković,
  • Mirjana Milojević-Ilić,
  • Marina Petrović,
  • Nebojša Igrutinović,
  • Marko Vuleta,
  • Ljiljana Timotijević and
  • Olivera Kostić
  • + 1 author

1 November 2023

Background and Objectives: The Baveno classification represents a new approach to the assessment of the severity of OSA (Obstructive sleep apnea), which takes significant comorbidities into account: atrial fibrillation, arterial hypertension, heart f...

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