Experimental Astronomy最新文献_第4页

Light-tracing based surface deformation measurement strategy for large radio telescopes 基于光跟踪的大型射电望远镜表面形变测量战略

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-10-18 DOI: 10.1007/s10686-024-09960-w

Zihan Zhang, Dejin Yang, Qian Ye, Na Wang

{"title":"Light-tracing based surface deformation measurement strategy for large radio telescopes","authors":"Zihan Zhang, Dejin Yang, Qian Ye, Na Wang","doi":"10.1007/s10686-024-09960-w","DOIUrl":"10.1007/s10686-024-09960-w","url":null,"abstract":"<div><p>With the increasing aperture as well as the observation frequency of radio telescopes in the current period, the deformation caused by time-varying loads such as temperature and wind has been emphasized. Existing methods for measuring deformations often fall short in meeting the demands of full attitude coverage, quasi-real-time response, and high accuracy. This study introduces a novel geometric-optical measurement approach based on light-tracing. Diverging from traditional methods, this approach doesn’t directly measure the surface deformation of the main reflector. Instead, it creates a more easily measurable variable and establishes a mapping relationship between this variable and the main reflector deformation. In this innovative scheme, multiple laser modules are strategically positioned on the main reflector, treating the sub reflector as a spot projection surface. When the panel is displaced, the spot on the projection surface will follow and be displaced. In practice, the main reflector deformation can be solved by recording the position change of the light spots on the projection surface and utilizing the inverse reconstruction model. Besides, effective strategies are proposed to improve the robustness of the scheme. Next, the accuracy and real-time performance of the proposed method are verified through simulations and experiments. Results indicate that the proposed approach presents a fresh perspective to enhance the efficiency and precision of deformation measurements for large-aperture antennas.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142447314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A thermo-optical test device utilizing the 100-m x-ray test facility 利用 100 米 X 射线测试设备的热光学测试装置

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-10-13 DOI: 10.1007/s10686-024-09959-3

Jia Ma, Yusa Wang, Zijian Zhao, Dongjie Hou, Juan Wang, Xiongtao Yang, Yuxuan Zhu, Jianchao Feng, Xiaofan Zhao, Weiwei Cui, Yanji Yang, Yong Chen, Xiaofeng Zhang

{"title":"A thermo-optical test device utilizing the 100-m x-ray test facility","authors":"Jia Ma, Yusa Wang, Zijian Zhao, Dongjie Hou, Juan Wang, Xiongtao Yang, Yuxuan Zhu, Jianchao Feng, Xiaofan Zhao, Weiwei Cui, Yanji Yang, Yong Chen, Xiaofeng Zhang","doi":"10.1007/s10686-024-09959-3","DOIUrl":"10.1007/s10686-024-09959-3","url":null,"abstract":"<div><p>X-ray mirror modules are the core components of X-ray astronomy research, which can focus X-rays from space and significantly improve detection sensitivity. This X-ray optical device are typically composed of nested multiple mirror shells and require maintaining a constant working temperature. Due to the thin-walled structure of the mirror shells and the fact that the inner surface reflects X-rays, direct contact temperature control is not feasible, making temperature control challenging. To evaluate the thermo-optical performance of the mirrors, based on the 100-m X-ray Test Facility (100XF) of the Institute of High Energy Physics (IHEP), a thermo-optical test device with high cleanliness was developed in this study. This system enables precise control of the mirror temperature and synchronous testing of X-ray performance, establishing the unique X-ray thermo-optical testing capability in China. The system consists of a high cleanliness level thermal sink, a liquid nitrogen circuit, multi-layer insulation, a temperature controller, and low-temperature probes. This system has demonstrated the capability to test the thermo-optical performance of X-ray mirror modules and has successfully conducted thermo-optical tests on the mirror module of the follow-up X-ray telescope (FXT) payload onboard the Einstein Probe (EP), achieving precise temperature control of the X-ray mirrors and testing its X-ray optical performance at different operating temperatures. The thermo-optical performance of the mirror module obtained from the thermal tests has been verified in-orbit. This paper provides a detailed description of the design, development, and validation of this system, as well as an overview of the results of the thermo-optical tests conducted on the FXT.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142431050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using SRG/eROSITA to predict soft proton induced ATHENA backgrounds 利用 SRG/eROSITA 预测软质子诱导的 ATHENA 背景

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-10-12 DOI: 10.1007/s10686-024-09956-6

Emanuele Perinati, Michael J. Freyberg, Michael C. H. Yeung, Konrad Dennerl, Christian Pommranz, Bastian Heß, Sebastian Diebold, Chris Tenzer, Andrea Santangelo

{"title":"Using SRG/eROSITA to predict soft proton induced ATHENA backgrounds","authors":"Emanuele Perinati, Michael J. Freyberg, Michael C. H. Yeung, Konrad Dennerl, Christian Pommranz, Bastian Heß, Sebastian Diebold, Chris Tenzer, Andrea Santangelo","doi":"10.1007/s10686-024-09956-6","DOIUrl":"10.1007/s10686-024-09956-6","url":null,"abstract":"<div><p>Soft protons populating the space environment have affected the performance of the X-ray detectors on board Chandra and XMM-Newton, and they pose a threat for future high energy astrophysics missions with larger aperture, such as ATHENA. In this paper, we aim to predict the soft proton induced ATHENA backgrounds from the modelling of the orbital flux obtained using eROSITA on board SRG. To this end, we analysed the background measured by eROSITA and with the help of simulations we defined a range of values for the potential count-rate of quiet-time soft protons focused through the mirror shells. We used it to derive an estimate of the orbital soft proton flux, from which the induced background for the WFI and X-IFU detectors can be predicted, assuming ATHENA in the same L2-orbit as SRG. The scaling, based on the computed proton transmission yields of the optics and optical/thermal filters, indicates that the soft proton induced WFI and X-IFU backgrounds could be expected within the requirement. Regardless of where ATHENA will be placed (L1 or L2), our analysis also suggests that increasing somewhat the thickness of the WFI optical blocking filter, e.g. by <span>(sim )</span>30%, would help to further reduce the soft proton flux onto the detector, which might be worth in case the planned magnetic diverters perform worse than expected due to soft proton neutralisation at the mirror level.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10686-024-09956-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of long term atmospheric properties for Eastern Anatolia observatory (DAG) site 东安纳托利亚观测站（DAG）站点的长期大气特性分析

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-10-08 DOI: 10.1007/s10686-024-09952-w

Funda Yuzlukoglu, Cahit Yesilyaprak, Kazım Kaba, Tuba Ikiz, Mohammad Shameoni Niaei

{"title":"Analysis of long term atmospheric properties for Eastern Anatolia observatory (DAG) site","authors":"Funda Yuzlukoglu, Cahit Yesilyaprak, Kazım Kaba, Tuba Ikiz, Mohammad Shameoni Niaei","doi":"10.1007/s10686-024-09952-w","DOIUrl":"10.1007/s10686-024-09952-w","url":null,"abstract":"<div><p>Eastern Anatolia Observatory (DAG), located at 39.78 degrees North latitude (N) and 41.23 degrees East longitude (E) with 3170 m altitude above the sea level in the east part of Türkiye, having the first 4m class infrared (IR) telescope. DAG telescope is not only the largest telescope in Türkiye but also the most important telescope in the northern hemisphere because it also covers a large observational gap thanks to its location over the World. The atmospheric conditions of the DAG site have a major impact on the quality of observations in ground-based astronomy. The atmospheric conditions of an observatory site being effective and important for both optical and infrared observations is a key parameter in assessing the performance of astronomic observations and observatory sites. In this study, as an observatory site, a detailed long-term atmospheric and astronomical analysis of DAG site were presented for near-infrared observations, especially. Within the scope of basic atmospheric and astronomical parameters, it has been revealed that the DAG site is an observatory site with a great astronomical observation potential, due to its location, robust infrastructure, astronomical and atmospheric properties originating from geography.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142410732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of the relationship between metrological characterization and angular resolution in grazing-incidence X-ray optics 掠入射 X 射线光学中计量特征与角度分辨率之间关系的研究

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-09-24 DOI: 10.1007/s10686-024-09955-7

L. Q. Qi, Y. X. Zhu, X. Z. Ding, Y. P. Xu, D. F. Wang, T. X. Chen, D. Z. Diao, F. G. Yang, G. Li, D. Xie, Y. S. Wang, S. Yang, T. Luo, M. Y. Ge, Z. W. Li

{"title":"Study of the relationship between metrological characterization and angular resolution in grazing-incidence X-ray optics","authors":"L. Q. Qi, Y. X. Zhu, X. Z. Ding, Y. P. Xu, D. F. Wang, T. X. Chen, D. Z. Diao, F. G. Yang, G. Li, D. Xie, Y. S. Wang, S. Yang, T. Luo, M. Y. Ge, Z. W. Li","doi":"10.1007/s10686-024-09955-7","DOIUrl":"10.1007/s10686-024-09955-7","url":null,"abstract":"<div><p>The grazing-incidence optics with Wolter-I type geometry is commonly used in X-ray astronomy. The manufacturing technologies are still under development for future space missions to fulfill the stringent performance requirements with reduced weight and cost, e.g. the planned enhanced X-ray Timing and Polarimetry Mission. To improve the manufacturing process, it is necessary to study the relationship between metrological characterization and angular resolution via ray-optics or wave-optics models. The model calculations produce inconsistent results depending on the characteristics of wide-band surface errors, which require validation before their application in the Wolter-I type optics. In this work, two samples of the single-reflection mirrors with an elliptical shape are produced to validate the models. The first sample uses the Aluminum alloy substrate and the second sample uses the Aluminum alloy coated with Nickel-Phosphorous as the substrate. Tungsten is coated on both substrates to increase the X-ray reflectivity. The metrological characterization is inspected using the Fizeau interferometer and 3D optical profiler. The X-ray calibration of the mirror is performed in the 100-m X-ray Test Facility of Institute of High Energy Physics using the Color X-ray Camera. Both ray-optics and wave-optics models are validated in a wide scope of applications from smooth to relatively rough surfaces. The proper treatments of the metrological data are required as input to the model calculations: the post-fit distribution of figure errors, the micro-roughness defined in a specific frequency band, and the smoothed power spectral density of the surface errors. The validated models can be further applied in Wolter-I optics to predict mirror performances or to provide precision processing requirements.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calibration of spectropolarimetry channel of visible emission line coronagraph onboard Aditya-L1 校准 Aditya-L1 上可见发射线日冕仪的摄谱仪通道

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-09-13 DOI: 10.1007/s10686-024-09954-8

Venkata Suresh Narra, K. Sasikumar Raja, Raghavendra Prasad B, Jagdev Singh, Shalabh Mishra, Sanal Krishnan V U, Bhavana Hegde S, Utkarsha D., Natarajan V, Pawan Kumar S, Muthu Priyal V, Savarimuthu P, Priya Gavshinde, Umesh Kamath P

{"title":"Calibration of spectropolarimetry channel of visible emission line coronagraph onboard Aditya-L1","authors":"Venkata Suresh Narra, K. Sasikumar Raja, Raghavendra Prasad B, Jagdev Singh, Shalabh Mishra, Sanal Krishnan V U, Bhavana Hegde S, Utkarsha D., Natarajan V, Pawan Kumar S, Muthu Priyal V, Savarimuthu P, Priya Gavshinde, Umesh Kamath P","doi":"10.1007/s10686-024-09954-8","DOIUrl":"10.1007/s10686-024-09954-8","url":null,"abstract":"<div><p>The magnetic field strength and its topology play an important role in understanding the formation, evolution, and dynamics of the solar corona. Also, it plays a significant role in addressing long-standing mysteries such as coronal heating problem, origin and propagation of coronal mass ejections, drivers of space weather, origin and acceleration of solar wind, and so on. Despite having photospheric magnetograms for decades, we do not have reliable observations of coronal magnetic field strengths today. To measure the coronal magnetic field precisely, the spectropolarimetry channel of the Visible Emission Line Coronagraph (VELC) on board the Aditya-L1 mission is designed. Using the observations of coronal emission line Fe XIII [10747Å ], it is possible to generate full Stokes maps (I, Q, U, and V) that help in estimating the Line-of-Sight (LOS) magnetic field strength and to derive the magnetic field topology maps of solar corona in the Field of View (FOV) (1.05 – 1.5 R<span>(_{odot })</span>). In this article, we summarize the instrumental details of the spectropolarimetry channel and detailed calibration procedures adopted to derive the modulation and demodulation matrices. Furthermore, we have applied the derived demodulation matrices to the observed data in the laboratory and studied their performance.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bayesian and convolutional networks for hierarchical morphological classification of galaxies 用于星系分层形态分类的贝叶斯和卷积网络

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-08-31 DOI: 10.1007/s10686-024-09950-y

Jonathan Serrano-Pérez, Raquel Díaz Hernández, L. Enrique Sucar

{"title":"Bayesian and convolutional networks for hierarchical morphological classification of galaxies","authors":"Jonathan Serrano-Pérez, Raquel Díaz Hernández, L. Enrique Sucar","doi":"10.1007/s10686-024-09950-y","DOIUrl":"10.1007/s10686-024-09950-y","url":null,"abstract":"<div><p>In the universe, there are up to 2 trillion galaxies with different features ranging from the number of stars, light spectrum, age, or visual appearance. Consequently, automatic classifiers are required to perform this task; furthermore, as shown by some related works, while greater the number of classes considered, the performance of the classifiers tends to decrease. This work is focused on the morphological classification of galaxies. They can be associated with a subset of 10 classes arranged in a hierarchy derived from the Hubble sequence. The proposed method, Bayesian and Convolutional Neural Networks (BCNN), is composed of two main modules. The first module is a convolutional neural network trained with the images of galaxies, and its predictions feed the second module. The second module is a Bayesian network that evaluates the hierarchy and helps to improve the prediction accuracy by combining the predictions of the first module through probabilistic inference over the Bayesian network. A collection of galaxies sourced from the <i>Principal Galaxies Catalog</i> and the <i>APM Equatorial Catalogue of Galaxies</i> are used to perform the experiments. The results show that BCNN performed better than five CNNs in multiple evaluation measures, reaching the scores 83% in hierarchical F-measure, 78% in accuracy, and 67% in exact match evaluation.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Astronomical site selection for Antarctica with astro-meteorological parameters 利用天文气象参数为南极洲选择天文观测站点

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-08-24 DOI: 10.1007/s10686-024-09951-x

N. Aksaker, M. Bayazit, Z. Kurt, S. K. Yerli, A. Aktay, M. A. Erdoğan

{"title":"Astronomical site selection for Antarctica with astro-meteorological parameters","authors":"N. Aksaker, M. Bayazit, Z. Kurt, S. K. Yerli, A. Aktay, M. A. Erdoğan","doi":"10.1007/s10686-024-09951-x","DOIUrl":"10.1007/s10686-024-09951-x","url":null,"abstract":"<div><p>The primary objective of this study is to employ Multi-Criteria Decision Analysis (MCDA) and Geographical Information System (GIS) techniques to identify and assess potential sites for astronomical observations in Antarctica. Our study focuses on the development of the Suitability Index for Astronomical Sites in Antarctica (SIASA). This index is formulated by merging data from satellites and models, providing extensive temporal and spatial coverage over two decades. To assess its suitability, we employed a combination of MCDA and GIS techniques, allowing us to evaluate various data, including cloud cover (CC), precipitable water vapor (PWV) levels, elevation, atmospheric temperature and wind speed. Our analysis confirmed the exceptional characteristics of Antarctica: An average of 361 cloud-free days per year, exceptionally low PWV values (0 mm), and an average elevation of 2.300 meters. The stable atmospheric wind profile further enhances its suitability for astronomical observations. Long-term trends and correlations of the data were also studied. SIASA values identified the eastern and inner parts of the Transatlantic Mountains as highly favorable for astronomical observations, while the coastal areas were considered less suitable. The best sites cover 10% of Antarctica in all SIASA scenarios, with Dome A, Ridge A and Dome F having the highest values of all stations. These findings hold considerable importance in planning future astronomical sites on the continent.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GReFC-Net: an automated method for measuring structural features of spiral galaxies GReFC-Net：测量螺旋星系结构特征的自动方法

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-08-22 DOI: 10.1007/s10686-024-09953-9

Gengqi Lin, Liangping Tu, Jianxi Li, Jiawei Miao

{"title":"GReFC-Net: an automated method for measuring structural features of spiral galaxies","authors":"Gengqi Lin, Liangping Tu, Jianxi Li, Jiawei Miao","doi":"10.1007/s10686-024-09953-9","DOIUrl":"10.1007/s10686-024-09953-9","url":null,"abstract":"<div><p>The spiral structure is an important morphology within galaxies, providing information on the formation, evolution, and environment of spiral galaxies. The number of spiral arms is one of the important parameters to describe the morphology of spiral galaxies. In this project, we study the classification of spiral galaxies by the number of spiral arms based on deep learning algorithms. The data set for this project consists of eligible samples from Galaxy Zoo 2 and Galaxy Zoo DECaLS. To better identify the texture features of the spiral arms, we designed a convolutional neural network model incorporating Gabor filter (Gabor Residual Filtering Convolutional Net, GReFC-Net), and used other networks for 3 and 4-way classifications. In the 3-way case, the GReFC-Net algorithm achieves the highest precision, recall, F1-score, and AUC value, which are 96.25%, 96.23%, 96.21%, and 0.9937. In the 4-way case, the GReFC-Net algorithm has the highest recall, F1-score and AUC value, which are 95.57%, 95.42% and 0.9957. The interpretability of GReFC-Net is analyzed by the SHAP method, and the results show that the network can identify the spiral arm structure of spiral galaxies well. It can be seen that the GReFC-Net algorithm can be effectively applied to the automatic measurement task of spiral arm structure in a large number of spiral galaxies.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of PWV products derived from satellite-based and radiosonde retrievals for the eastern anatolia observatory (DAG) 对东安特里亚观测站（DAG）卫星和无线电探空仪检索得出的 PWV 产品进行评估

IF 2.7 3区物理与天体物理

Experimental Astronomy Pub Date : 2024-07-29 DOI: 10.1007/s10686-024-09949-5

Recep Balbay, Kazım Kaba, Süleyman Fişek, Cahit Yeşilyaprak

{"title":"Evaluation of PWV products derived from satellite-based and radiosonde retrievals for the eastern anatolia observatory (DAG)","authors":"Recep Balbay, Kazım Kaba, Süleyman Fişek, Cahit Yeşilyaprak","doi":"10.1007/s10686-024-09949-5","DOIUrl":"10.1007/s10686-024-09949-5","url":null,"abstract":"<div><p>In this study, we have presented the results of the precipitable water vapor (PWV) for the Eastern Anatolia Observatory (in Turkish: Doğu Anadolu Gözlemevi, the acronym is DAG) site in Erzurum, Türkiye. The DAG has Türkiye’s largest and the first near infrared (NIR) telescope with a mirror diameter of 4 meters at the altitude of 3170 m. The DAG telescope is going to take the first light in the end of summer 2024. This study is focused on the examining of the precipitable water vapor data for the NIR observations at the DAG. In this context, the NWC SAF Total Precipitable Water (TPW) data obtained by both the satellite based and the radiosonde balloon validated with six radiosonde stations were examined by temporal, vertical and horizontal analyses for the DAG site between June 2019 to December 2020. The results obtained from these analyzes indicate that the mean and median TPW values at the DAG site were approximately 7 mm and the minimum and maximum values were 0.59 mm and 24.12 mm, respectively. The monthly median TPW values at the DAG site varied between approximately 3-10 mm, with a decreasing trend from June to January and an increase in the first seven months of 2020. These results also indicate that the TPW data obtained by its 15 minutes temporal resolution, aligns closely with the radiosonde measurements. Furthermore, the values of PWV at both lower and upper levels of the atmosphere are minimal while the values increase slightly in the middle layer of the atmosphere. As a result, the effective monitoring of the PWV in a site would result in the generation of higher quality astronomical IR observations and be important in terms of the optimum operating cost for an observatory.</p></div>","PeriodicalId":551,"journal":{"name":"Experimental Astronomy","volume":"58 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10686-024-09949-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0