Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9025994
Yue Liu, Debin Su, Yang Cao
The reflectivity observation was analyzed to study the reliability of three-dimensional gridding algorithm during a precipitation process in Hainan on July 2, 2019, which acquired from CINRAD/SA weather radars located in Haikou and Dongfang. In this study, according to the nearest neighbor method in radial and the vertical linear interpolation method in azimuth, the volume-scanned reflectivity data of radar at Haikou in the spherical coordinate were interpolated into the longitude and latitude grids in the cartesian coordinate. The three-dimensional gridding reflectivity was verified by comparing its structural characteristics with the original volume-scanned reflectivity. The statistical errors between the three-dimensional gridding reflectivity and the volumescanned reflectivity observed from radar at Dongfang during the same period of time and in the common detection area were analyzed. The results show that the three-dimensional gridding reflectivity has a good continuity in space, and also retains the structural features of the original volume-scanned reflectivity data, and it is in good spatial consistency with the reflectivity observed from the weather radar in Dongfang city.
{"title":"Verification of Three-Dimensional Gridding Algorithm for Weather Radar Reflectivity","authors":"Yue Liu, Debin Su, Yang Cao","doi":"10.1109/ICMO49322.2019.9025994","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9025994","url":null,"abstract":"The reflectivity observation was analyzed to study the reliability of three-dimensional gridding algorithm during a precipitation process in Hainan on July 2, 2019, which acquired from CINRAD/SA weather radars located in Haikou and Dongfang. In this study, according to the nearest neighbor method in radial and the vertical linear interpolation method in azimuth, the volume-scanned reflectivity data of radar at Haikou in the spherical coordinate were interpolated into the longitude and latitude grids in the cartesian coordinate. The three-dimensional gridding reflectivity was verified by comparing its structural characteristics with the original volume-scanned reflectivity. The statistical errors between the three-dimensional gridding reflectivity and the volumescanned reflectivity observed from radar at Dongfang during the same period of time and in the common detection area were analyzed. The results show that the three-dimensional gridding reflectivity has a good continuity in space, and also retains the structural features of the original volume-scanned reflectivity data, and it is in good spatial consistency with the reflectivity observed from the weather radar in Dongfang city.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122851965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9026154
Luo Huiguo, Jia Ning, Jiang Juanping, He Qi
In order to study the effects of different wind speeds on the shape and speed of raindrops, other factors were first ignored to discuss the effects of different wind speeds on the shape of the raindrops. Through the Beard and Chuang models, it is found that the raindrops deform when the raindrop diameter is larger than 1mm, and then the horizontal wind speed affects the change of the final velocity of the raindrops under the effect of only the horizontal wind stress and the air drag force. The horizontal wind speed promotes the generation of the end of the raindrop. When the horizontal wind stress and the air drag force are balanced, the end of the raindrop level will reach a steady state in a short time. The greater the wind speed, the greater the end velocity. Through the above conclusions, the size and distribution of rainfall can be known, so that the weather conditions can be known in advance, and applications can be applied in agriculture and green living fields. In addition, if the principle of image acquisition is applied to the use of optical instruments to process raindrop images, it can play an extremely important role in meteorological science research.
{"title":"Effects of Wind Speed on Shape and Fall Velocity of Raindrops","authors":"Luo Huiguo, Jia Ning, Jiang Juanping, He Qi","doi":"10.1109/ICMO49322.2019.9026154","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9026154","url":null,"abstract":"In order to study the effects of different wind speeds on the shape and speed of raindrops, other factors were first ignored to discuss the effects of different wind speeds on the shape of the raindrops. Through the Beard and Chuang models, it is found that the raindrops deform when the raindrop diameter is larger than 1mm, and then the horizontal wind speed affects the change of the final velocity of the raindrops under the effect of only the horizontal wind stress and the air drag force. The horizontal wind speed promotes the generation of the end of the raindrop. When the horizontal wind stress and the air drag force are balanced, the end of the raindrop level will reach a steady state in a short time. The greater the wind speed, the greater the end velocity. Through the above conclusions, the size and distribution of rainfall can be known, so that the weather conditions can be known in advance, and applications can be applied in agriculture and green living fields. In addition, if the principle of image acquisition is applied to the use of optical instruments to process raindrop images, it can play an extremely important role in meteorological science research.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114516299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9025815
Zou Shuping, Huang Yu, Zhou Yunjun, L. Lili, Zeng Yong, Yang Zhe
By using time shifting technology and mathematical statistics method, the evolution process of the formation and development of Hail Cloud monomer and thunderstorm cloud monomer on both sides of Dalou mountain in Guizhou Province on April 30th, 2015 was comparing analyzed. The radar echo characteristic quantity commonly used to identify thunderstorm cloud and hailstorm cloud were selected as the physical quantity for time and trend consistency comparative analysis about typical characteristics of two kinds of radar echo belonging to different precipitation properties of Strong convection monomers. The results show that: (1) The strong convective weather process is composed of two thunderstorm clouds and two hail clouds, which have great consistency on duration and strength characteristics; (2)The time consistency analysis shows that, the two monomers’ echo intensity and the vertical liquid water content have a good consistency on fluctuation, and the trend of synchronization jet lag is about 12 mins;(3)The expected value and correlation coefficient of echo intensity and vertical accumulated liquid water content about two monomers are improved significantly by using the technology called time shifting, and the variation trend of time series has better consistency and correlation; (4) From the perspective of geometric characteristics analysis of the two monomers’ vertical sections, the heights corresponding to the area with high echo intensity are consistent of both, and the vertical profile shape of echo intensity is basically consistent. (5) It is concluded that there is a good similarity between the formation and development of multi-monomer convective weather under the same atmospheric environment conditions. This conclusion can be used as the basis for the selection of physical inspection examples of artificial flood control operations.
{"title":"Characteristics Similarity Analysis of Two Multi-cell Radar Echoes","authors":"Zou Shuping, Huang Yu, Zhou Yunjun, L. Lili, Zeng Yong, Yang Zhe","doi":"10.1109/ICMO49322.2019.9025815","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9025815","url":null,"abstract":"By using time shifting technology and mathematical statistics method, the evolution process of the formation and development of Hail Cloud monomer and thunderstorm cloud monomer on both sides of Dalou mountain in Guizhou Province on April 30th, 2015 was comparing analyzed. The radar echo characteristic quantity commonly used to identify thunderstorm cloud and hailstorm cloud were selected as the physical quantity for time and trend consistency comparative analysis about typical characteristics of two kinds of radar echo belonging to different precipitation properties of Strong convection monomers. The results show that: (1) The strong convective weather process is composed of two thunderstorm clouds and two hail clouds, which have great consistency on duration and strength characteristics; (2)The time consistency analysis shows that, the two monomers’ echo intensity and the vertical liquid water content have a good consistency on fluctuation, and the trend of synchronization jet lag is about 12 mins;(3)The expected value and correlation coefficient of echo intensity and vertical accumulated liquid water content about two monomers are improved significantly by using the technology called time shifting, and the variation trend of time series has better consistency and correlation; (4) From the perspective of geometric characteristics analysis of the two monomers’ vertical sections, the heights corresponding to the area with high echo intensity are consistent of both, and the vertical profile shape of echo intensity is basically consistent. (5) It is concluded that there is a good similarity between the formation and development of multi-monomer convective weather under the same atmospheric environment conditions. This conclusion can be used as the basis for the selection of physical inspection examples of artificial flood control operations.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116678087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9026112
Yang Luo, Huizhong Lu, Ning Jia
The resolution of an image is an important indicator for measuring image quality. The higher the resolution, the more detailed information is contained in the image, which is more conducive to subsequent image analysis and other tasks. Improving the resolution of images has always been the unremitting pursuit of industry and academia. In the past, people used hardware devices to increase the resolution, which is a practical solution. However, there are many limitations in the method of improving the image resolution by hardware devices. We use software-based image super-resolution technology, which transforms low-resolution images into high-resolution images through a series of machine learning algorithms. The classic GAN algorithm is difficult to train a model, and the improved Wasserstein GAN algorithm can make the model training more stable. Based on SRGAN model, this algorithm replaces the classical GAN algorithm with the improved WGAN algorithm. We will use the FY-3D satellite’s Medium Resolution Spectral Imager Type II (MERSI-II) data, using super-resolution algorithms to make the reconstructed image significantly better visually. We conducted four sets of controlled experiments using four different improved methods. We will evaluate the image from three aspects: peak signal to noise ratio value, structural similarity value and visual effect. We applied the WGAN-GP algorithm to super-resolution tasks and achieved the desired results.
{"title":"Super-Resolution Algorithm of Satellite Cloud Image Based on WGAN-GP","authors":"Yang Luo, Huizhong Lu, Ning Jia","doi":"10.1109/ICMO49322.2019.9026112","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9026112","url":null,"abstract":"The resolution of an image is an important indicator for measuring image quality. The higher the resolution, the more detailed information is contained in the image, which is more conducive to subsequent image analysis and other tasks. Improving the resolution of images has always been the unremitting pursuit of industry and academia. In the past, people used hardware devices to increase the resolution, which is a practical solution. However, there are many limitations in the method of improving the image resolution by hardware devices. We use software-based image super-resolution technology, which transforms low-resolution images into high-resolution images through a series of machine learning algorithms. The classic GAN algorithm is difficult to train a model, and the improved Wasserstein GAN algorithm can make the model training more stable. Based on SRGAN model, this algorithm replaces the classical GAN algorithm with the improved WGAN algorithm. We will use the FY-3D satellite’s Medium Resolution Spectral Imager Type II (MERSI-II) data, using super-resolution algorithms to make the reconstructed image significantly better visually. We conducted four sets of controlled experiments using four different improved methods. We will evaluate the image from three aspects: peak signal to noise ratio value, structural similarity value and visual effect. We applied the WGAN-GP algorithm to super-resolution tasks and achieved the desired results.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128399042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9026136
Shanshan Lv, J. Jin, Qing Zhou, Yimeng Wang
One of the important parameters reflecting aerosol properties is aerosol optical depth (AOD). The aerosol optical properties and the impact of meteorological conditions on pollution levels were analyzed in a special period in Beijing during October 2019. There were pollution events during this period, whereas the National Day celebration and military parade were held during this period, with traffic restriction and factory emissions reduction measures taken place to improve the air quality. In this study, AOD was calculated from synchronous observation of two sun photometers installed in the experimental base of atmospheric sounding of CMA Meteorological Observation Centre, and the causes of errors of the two instruments under different weather conditions were preliminarily analyzed. The observation results of the two instruments were consistent, and the AOD deviation was basically lower than 0.03 (@AOD=0.2), with the relative deviation smaller than 10%. The main reasons for the difference were summarized as follows: 1) Although the AOD calculation is based on the same principle, the settings of parameters, such as temperature correction coefficient, were different due to different instrument structures. 2) Due to the difference in data interval caused by the observation mode, there were differences in data time matching. Apart from that, the instantaneous AOD changes greatly, the difference between the two instruments increases accordingly. 3) Meteorological conditions, such as obvious dust and rainfall events, affected the accuracy of instrument observation, and short-wave observation is more sensitive to those changes.
{"title":"Aerosol Optical Properties and Instrument Comparisons in October 2019","authors":"Shanshan Lv, J. Jin, Qing Zhou, Yimeng Wang","doi":"10.1109/ICMO49322.2019.9026136","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9026136","url":null,"abstract":"One of the important parameters reflecting aerosol properties is aerosol optical depth (AOD). The aerosol optical properties and the impact of meteorological conditions on pollution levels were analyzed in a special period in Beijing during October 2019. There were pollution events during this period, whereas the National Day celebration and military parade were held during this period, with traffic restriction and factory emissions reduction measures taken place to improve the air quality. In this study, AOD was calculated from synchronous observation of two sun photometers installed in the experimental base of atmospheric sounding of CMA Meteorological Observation Centre, and the causes of errors of the two instruments under different weather conditions were preliminarily analyzed. The observation results of the two instruments were consistent, and the AOD deviation was basically lower than 0.03 (@AOD=0.2), with the relative deviation smaller than 10%. The main reasons for the difference were summarized as follows: 1) Although the AOD calculation is based on the same principle, the settings of parameters, such as temperature correction coefficient, were different due to different instrument structures. 2) Due to the difference in data interval caused by the observation mode, there were differences in data time matching. Apart from that, the instantaneous AOD changes greatly, the difference between the two instruments increases accordingly. 3) Meteorological conditions, such as obvious dust and rainfall events, affected the accuracy of instrument observation, and short-wave observation is more sensitive to those changes.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128254195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9026095
X. Jia, Yong Zhang, Yang Gao, Wei-wei Gao
The long-term trend of pH value and conductivity in precipitation at Baoshan and Pudong in Shanghai during 1993-2018 are reported and the main reasons for the formation of the acid rain at both sites are analyzed. The Yangtze River Delta is one of the severe acid rain areas in China, and the multi-year precipitation pH values at Baoshan from 1993 to 2018 and Pudong from 2008 to 2018 were 5.51 and 4.83, respectively. The precipitation pH trends at Baoshan during 1993-1999, 1999-2009, 2009-2018 were different. The annual precipitation pH variability during 1993-1999 at Baoshan was 0.15 a-1, indicating an increased trend of the pH value. While that during 1999-2009 was- 0.08 a-1, indicating a more severe acid rain pollution trend during this period. But that during 2009-2018 was 0.06 and 0.07 a-1 at Baoshan and Pudong respectively, indicating an upward trend of the pH value at both sites which both consistent with the trend in the Yangtze River Delta. In addition, the acid rain frequency showed the same trend of pH value. The electrical conductivity at two sites declined obviously during 2009-2018. The changes on the regional SO2 emissions during 1993-2018 were possible reason for the variation characteristics of acid rain. Generally speaking, precipitation at Pudong showed weaker acidity than Baoshan which may because the different pollutants around the sites. The pH value and precipitation were negatively correlated at Baoshan while positive correlated at Pudong. The atmospheric pollutants and precipitation were important effects on the changes of precipitation pH at Baoshan and Pudong.
{"title":"The Precipitation Acidity Trend in Shanghai during 1993-2018","authors":"X. Jia, Yong Zhang, Yang Gao, Wei-wei Gao","doi":"10.1109/ICMO49322.2019.9026095","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9026095","url":null,"abstract":"The long-term trend of pH value and conductivity in precipitation at Baoshan and Pudong in Shanghai during 1993-2018 are reported and the main reasons for the formation of the acid rain at both sites are analyzed. The Yangtze River Delta is one of the severe acid rain areas in China, and the multi-year precipitation pH values at Baoshan from 1993 to 2018 and Pudong from 2008 to 2018 were 5.51 and 4.83, respectively. The precipitation pH trends at Baoshan during 1993-1999, 1999-2009, 2009-2018 were different. The annual precipitation pH variability during 1993-1999 at Baoshan was 0.15 a-1, indicating an increased trend of the pH value. While that during 1999-2009 was- 0.08 a-1, indicating a more severe acid rain pollution trend during this period. But that during 2009-2018 was 0.06 and 0.07 a-1 at Baoshan and Pudong respectively, indicating an upward trend of the pH value at both sites which both consistent with the trend in the Yangtze River Delta. In addition, the acid rain frequency showed the same trend of pH value. The electrical conductivity at two sites declined obviously during 2009-2018. The changes on the regional SO2 emissions during 1993-2018 were possible reason for the variation characteristics of acid rain. Generally speaking, precipitation at Pudong showed weaker acidity than Baoshan which may because the different pollutants around the sites. The pH value and precipitation were negatively correlated at Baoshan while positive correlated at Pudong. The atmospheric pollutants and precipitation were important effects on the changes of precipitation pH at Baoshan and Pudong.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126890679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9025995
G. Ni, Wang Wei, W. Xiaoping, Hu Die, S. Sha, W. Lijuan
The eastern part of Northwest China, located on the edge of the East Asian monsoon region with low precipitation and high variability, is one of the regions with the most frequent droughts in China. The drought causes huge agriculture losses in this region. We created agricultural drought remote sensing monitoring and analysis platform(ADMP) in Northwest China base on FY-3 Data in order to improve the universality, comparability and automation degree of agricultural drought monitoring based on remote sensing in Northwest China, meanwhile, an optimization scheme for drought monitoring based on the coupling of climate division and vegetation types was proposed according to the applicability evaluation of multiple drought monitoring models, for giving full play to the role of FY-3 series satellites. The ADMP consists of three parts, namely data support system, monitoring and analysis system and product release and display system. The function of these systems is achieved using plug-in design concept, which build server-side plug-in framework, formulate business plug-in integration specification as well as carry out modular packaging and service transformation of algorithms and data resources, Therefore, It realizes the configurable, expandable, pluggable goals of the new business modules, and effectively avoids repeated construction caused by the addition of new applications in the traditional mode.The ADMP is composed of three subsystems and twelve sub-functional modules. It can automatically produce seven drought indices products with multiple time scales (day, five days, ten days and month). Furthermore, the ADMP products include thematic maps, statistical tables and monitoring reports at the four levels of the northwest region, province, city, and county. The ADMP products consistent with the actual situation in drought range and intensity through the monitoring lots of drought cases.
{"title":"Agricultural Drought Remote Sensing Monitoring and Analysis Platform in Northwest China Base on FY-3 Data","authors":"G. Ni, Wang Wei, W. Xiaoping, Hu Die, S. Sha, W. Lijuan","doi":"10.1109/ICMO49322.2019.9025995","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9025995","url":null,"abstract":"The eastern part of Northwest China, located on the edge of the East Asian monsoon region with low precipitation and high variability, is one of the regions with the most frequent droughts in China. The drought causes huge agriculture losses in this region. We created agricultural drought remote sensing monitoring and analysis platform(ADMP) in Northwest China base on FY-3 Data in order to improve the universality, comparability and automation degree of agricultural drought monitoring based on remote sensing in Northwest China, meanwhile, an optimization scheme for drought monitoring based on the coupling of climate division and vegetation types was proposed according to the applicability evaluation of multiple drought monitoring models, for giving full play to the role of FY-3 series satellites. The ADMP consists of three parts, namely data support system, monitoring and analysis system and product release and display system. The function of these systems is achieved using plug-in design concept, which build server-side plug-in framework, formulate business plug-in integration specification as well as carry out modular packaging and service transformation of algorithms and data resources, Therefore, It realizes the configurable, expandable, pluggable goals of the new business modules, and effectively avoids repeated construction caused by the addition of new applications in the traditional mode.The ADMP is composed of three subsystems and twelve sub-functional modules. It can automatically produce seven drought indices products with multiple time scales (day, five days, ten days and month). Furthermore, the ADMP products include thematic maps, statistical tables and monitoring reports at the four levels of the northwest region, province, city, and county. The ADMP products consistent with the actual situation in drought range and intensity through the monitoring lots of drought cases.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123226719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9025868
Gu Jian, DuYu Ming, LiYi Cheng
Based on the fact that the x-band weather radar transmits data bandwidth is big in real time, and the distance between the weather station radar and the computer room is far away, a full duplex high-speed data transmission scheme based on optical fiber is designed and implemented on Xilinx FPGA. For the differences between XC7K410T GTX and XC7K325T GTX, it is necessary to adjust the parameters such as pre/deemphasis and receive equalization value, receiving terminal voltage and transmitting differential voltage swing that ensure normal data transmission and reception between the two. The suitable communication parameters for the hardware are measured by IBERT to set the transceiver GTX, and then the high-speed transceiver interface of the system is designed by the custom transmission data frame protocol, and the transmission rate of the single channel 10Gb/s is realized. It has been successfully applied in the x-band dual-polarized weather radar system of the company.
{"title":"Design and Implementation of High Speed Data Transmission for X-Band Dual Polarized Weather Radar","authors":"Gu Jian, DuYu Ming, LiYi Cheng","doi":"10.1109/ICMO49322.2019.9025868","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9025868","url":null,"abstract":"Based on the fact that the x-band weather radar transmits data bandwidth is big in real time, and the distance between the weather station radar and the computer room is far away, a full duplex high-speed data transmission scheme based on optical fiber is designed and implemented on Xilinx FPGA. For the differences between XC7K410T GTX and XC7K325T GTX, it is necessary to adjust the parameters such as pre/deemphasis and receive equalization value, receiving terminal voltage and transmitting differential voltage swing that ensure normal data transmission and reception between the two. The suitable communication parameters for the hardware are measured by IBERT to set the transceiver GTX, and then the high-speed transceiver interface of the system is designed by the custom transmission data frame protocol, and the transmission rate of the single channel 10Gb/s is realized. It has been successfully applied in the x-band dual-polarized weather radar system of the company.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123523856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9025850
Xu Yunong, Su Debin, L. Yue
Short-time heavy precipitation refers to a weather phenomenon in which the precipitation intensity is somewhat large in a short time, or the rainfall reaches or exceeds a certain value in the specified short time of period, which is an important indicator to evaluate the occurrence of severe convective weather. To address a process of precipitation in Beijing area, this paper studies the characteristics of weather radar echo under the condition of short-time heavy precipitation by using the ground rainfall observation from automatic weather station (AWS) network and the observations from the CINRAD-SA radar in Beijing area. A comparative analysis of a short-time heavy rainfall in Beijing area is conducted based on surface gauge and radar observations to investigate the temporal, spatial distributions of precipitation and the characteristics of radar echo above the surface stations, and the cross validation of AWS and SA radar data are carried out as well. For rainfall accumulation in 6min, the characteristics of ground precipitation were analyzed. Then, the consistency of radar products and ground precipitation characteristics were studied by analyzing the echo structure and its motion feature and matching quantitative precipitation estimation (QPE) products with surface rainfall observation. The result shows that the temporal and spatial distribution of short-time heavy precipitation have greater uncertainty, however, weather radar echo can reflect the characteristics of short-term heavy precipitation on the ground to a certain extent, and under the condition of short-term heavy precipitation, S-band radar QPE has a good consistency with the precipitation observed on the ground.
{"title":"Echo Feature Identification for Short-time Heavy Precipitation with S-band Observations","authors":"Xu Yunong, Su Debin, L. Yue","doi":"10.1109/ICMO49322.2019.9025850","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9025850","url":null,"abstract":"Short-time heavy precipitation refers to a weather phenomenon in which the precipitation intensity is somewhat large in a short time, or the rainfall reaches or exceeds a certain value in the specified short time of period, which is an important indicator to evaluate the occurrence of severe convective weather. To address a process of precipitation in Beijing area, this paper studies the characteristics of weather radar echo under the condition of short-time heavy precipitation by using the ground rainfall observation from automatic weather station (AWS) network and the observations from the CINRAD-SA radar in Beijing area. A comparative analysis of a short-time heavy rainfall in Beijing area is conducted based on surface gauge and radar observations to investigate the temporal, spatial distributions of precipitation and the characteristics of radar echo above the surface stations, and the cross validation of AWS and SA radar data are carried out as well. For rainfall accumulation in 6min, the characteristics of ground precipitation were analyzed. Then, the consistency of radar products and ground precipitation characteristics were studied by analyzing the echo structure and its motion feature and matching quantitative precipitation estimation (QPE) products with surface rainfall observation. The result shows that the temporal and spatial distribution of short-time heavy precipitation have greater uncertainty, however, weather radar echo can reflect the characteristics of short-term heavy precipitation on the ground to a certain extent, and under the condition of short-term heavy precipitation, S-band radar QPE has a good consistency with the precipitation observed on the ground.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123682034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/ICMO49322.2019.9026108
Rui Han, Huan Xie, Shenglin Xia
Compared with manned meteorological detection aircraft, UAV has the advantages of low cost and low risk. NASA has an extremely mature technical foundation in the use of UAV for meteorological detection, however, China is still at the early stage. The path planning of UAV largely depends on the mission planning system, but so far the need for dropsonde detection mission and path planning in China’s UAV mission planning system is not yet considered. Based on the meteorological detection requirements, this paper analyzes the technical characteristics of the UAV in this field, and various routes are designed for dropsonde detection according to the requirements of dropsonde detection mission and the characteristics of meteorological detection targets. Besides, according to the result of real-time meteorological observation, an adaptive route technology suitable for real-time flight is proposed. Consider the time, space limit and the flight performance of UAV, this technology can change the target according to the task needs and automatically adjust the flight route of dropsonde detection. With the use of this technology, the demand of flight route design for UAV when performing dropsonde detection can be basically satisfied.
{"title":"Research on Route Design Technology of UAV with Airborne Dropsonde","authors":"Rui Han, Huan Xie, Shenglin Xia","doi":"10.1109/ICMO49322.2019.9026108","DOIUrl":"https://doi.org/10.1109/ICMO49322.2019.9026108","url":null,"abstract":"Compared with manned meteorological detection aircraft, UAV has the advantages of low cost and low risk. NASA has an extremely mature technical foundation in the use of UAV for meteorological detection, however, China is still at the early stage. The path planning of UAV largely depends on the mission planning system, but so far the need for dropsonde detection mission and path planning in China’s UAV mission planning system is not yet considered. Based on the meteorological detection requirements, this paper analyzes the technical characteristics of the UAV in this field, and various routes are designed for dropsonde detection according to the requirements of dropsonde detection mission and the characteristics of meteorological detection targets. Besides, according to the result of real-time meteorological observation, an adaptive route technology suitable for real-time flight is proposed. Consider the time, space limit and the flight performance of UAV, this technology can change the target according to the task needs and automatically adjust the flight route of dropsonde detection. With the use of this technology, the demand of flight route design for UAV when performing dropsonde detection can be basically satisfied.","PeriodicalId":257532,"journal":{"name":"2019 International Conference on Meteorology Observations (ICMO)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120955266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：