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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Lihui Chai Weixing Wan Markus Fraenz Tielong Zhang Eduard Dubinin Yong Wei Yi Li Zhaojin Rong Jun Zhong Xiuhong Han Yoshifumi Futaana Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of Sciences CAS Key Laboratory of Geospace Environment University of Science and Technology of ChinaChinese Academy of Sciences Max-Planck-Institute for Solar System Research Space Research Institute Austrian Academy of Sciences Swedish Institute of Space Physics

It has been long known that the Venusian bow shock(BS) location is asymmetric from the observations of the long-lived Pioneer Venus Orbiter *** Venus Express(VEX) mission crossed BS near perpendicularly not only in the terminator region but also in the near-subsolar and tail *** the advantage of VEX orbit geometry,we examined a large data set of BS crossings observed during the long-lasting solar minimum between solar cycles 23 and 24 and found that the Venusian BS asymmetries exhibit dependence of solar zenith *** the terminator and tail regions,both the magnetic pole-equator and north-south asymmetries are observed in Venusian BS location,which is similar to the Pioneer Venus Orbiter(PVO) observation near ***,in the near-subsolar region,only the magnetic north-south is observed;i.e.,the BS shape is indented inward over magnetic south pole and bulged outward over magnetic north *** absence of the magnetic pole-equator asymmetry in the near-subsolar region suggests that the magnetic pole-equator asymmetry is mainly caused by the asymmetric wave propagation rather than the ion pickup *** evident magnetic north-south asymmetry in solar minimum,which is not observed by PVO,suggests that even during the low long-lasting solar minimum,the ion pickup process is very important in Venusian space environment.

关键词： The north-south asymmetry in Venusian BS location is observed in solar minimum The pole-equator asymmetry is absent in subsolar BS location The pole-equator asymmetry is caused by the asymmetric wave propagation

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An optical transmission spectrum for the ultra-hot Jupiter WASP-121b measured with the Hubble space Telescope

arXiv

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arXiv 2018年

作者： Evans, Thomas M. Sing, David K. Goyal, Jayesh Nikolov, Nikolay Marley, Mark S. Zahnle, Kevin Henry, Gregory W. Barstow, Joanna K. Alam, Munazza K. Sanz-Forcada, Jorge Kataria, Tiffany Lewis, Nikole K. Lavvas, Panayotis Ballester, Gilda E. Ben-Jaffel, Lotfi Blumenthal, Sarah D. Bourrier, Vincent Drummond, Benjamin Muñoz, Antonio García López-Morales, Mercedes Tremblin, Pascal Ehrenreich, David Wakeford, Hannah R. Buchhave, Lars A. des Etangs, Alain Lecavelier Hébrard, Éric Williamson, Michael H. Physics and Astronomy Stocker Road University of Exeter ExeterEX4 3RF United Kingdom Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology 77 Massachusetts Avenue 37-241 CambridgeMA02139 United States Department of Earth and Planetary Sciences Johns Hopkins University BaltimoreMD United States NASA Ames Research Center Moffett FieldCA United States Center of Excellence in Information Systems Tennessee State University NashvilleTN37209 United States Department of Physics and Astronomy University College London Gower Street LondonWC1E 6BT United Kingdom Harvard-Smithsonian Center for Astrophysics 60 Garden Street CambridgeMA02138 United States ESAC Campus Camino Bajo del Castillo Villanueva de la CanadaMadridE-28692 Spain NASA Jet Propulsion Laboratory 4800 Oak Grove Drive PasadenaCA91109 United States Department of Astronomy and Carl Sagan Institute Cornell University 122 Sciences Drive 14853 IthacaNY United States Groupe de Spectroscopie Moléculaire et Atmosphérique Université de Reims CNRS UMR F-7331 Champagne-Ardenne France Lunar and Planetary Laboratory University of Arizona TucsonAZ85721 United States Sorbonne Universités UPMC Université Paris 6 CNRS UMR 7095 Institut d’Astrophysique de Paris 98 bis boulevard Arago ParisF-75014 France Observatoire de l’Université de Genève 51 chemim des Maillettes Sauverny1290 Switzerland Zentrum für Astronomie und Astrophysik Technische Universität Berlin Hardenbergstrasse 36 BerlinD-10623 Germany Maison de la Simulation CEA CNRS Univ Paris-Sud UVSQ Université Paris-Saclay Gif-sur-YvetteF-91191 France Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States DTU Space National Space Institute Technical University of Denmark Elektrovej 328 Kgs. LyngbyDK-2800 Denmark

We present an atmospheric transmission spectrum for the ultra-hot Jupiter WASP-121b, measured using the space Telescope Imaging Spectrograph (STIS) onboard the Hubble space Telescope (HST). Across the 0.47–1 µm wavelength range, the data imply an atmospheric opacity comparable to – and in some spectroscopic channels exceeding – that previously measured at near-infrared wavelengths (1.15–1.65 µm). Wavelength-dependent variations in the opacity rule out a gray cloud deck at a confidence level of 3.8σ and may instead be explained by VO spectral bands. We find a cloud-free model assuming chemical equilibrium for a temperature of 1500 K and metal enrichment of 10–30× solar matches these data well. Using a free-chemistry retrieval analysis, we estimate a VO abundance of −6.6+0−0..23 dex. We find no evidence for TiO and place a 3σ upper limit of −7.9 dex on its abundance, suggesting TiO may have condensed from the gas phase at the day-night limb. The opacity rises steeply at the shortest wavelengths, increasing by approximately five pressure scale heights from 0.47 to 0.3 µm in wavelength. If this feature is caused by Rayleigh scattering due to uniformly-distributed aerosols, it would imply an unphysically high temperature of 6810±1530 K. One alternative explanation for the short-wavelength rise is absorption due to SH (mercapto radical), which has been predicted as an important product of non-equilibrium chemistry in hot Jupiter atmospheres. Irrespective of the identity of the NUV absorber, it likely captures a significant amount of incident stellar radiation at low pressures, thus playing a significant role in the overall energy budget, thermal structure, and circulation of the atmosphere. Copyright © 2018, The Authors. All rights reserved.

关键词： Chemical analysis

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Reusable planning and scheduling tool for SPPSS: Public Operation Service 14th

Reusable planning and scheduling tool for SPPSS: Public Oper...

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14th International Conference on space Operations, spaceOps 2016

作者： Li, Dalin Gu, Yanfeng Bai, Meng Yang, Binbin Wu, Hai Yan Harbin Institute of Technology Harbin150001 China National Space Science Center CAS Beijing100190 China Beihang University Beijing100191 China Key Laboratory of Integrated Avionics and Information Technology for Complex Aerospace System No.1 Nanertiao Zhonguancun Haidian district Beijing China School of Electronic and Information Engineering No.92 Xidazhijie Nangang district Harbin China Satellite Mission Operation Laboratory No.1 Nanertiao Zhonguancun Haidian district Beijing China School of Software No.37 Xueyuanlu Haidian district Beijing China

ISBN: (数字)9781624104268

ISBN: (纸本)9781624104268

The Strategic Pioneer Program on space science (SPPSS) was approved by Chinese Academy of sciences on January 2011. The first satellite in the program, Dark Matter Particle Explorer, was launched on December 2015. Public Operation Service system is designed to provide scheduling and planning services for all the satellite missions related to SPPSS. The system requirements are analyzed, and the layout of it is detailed introduced in this paper. Then the performance of the system is concluded at the end. © 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Scheduling

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On scattering centers of cone-shaped targets in bistatic mode

On scattering centers of cone-shaped targets in bistatic mod...

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Antennas and Propagation Society International Symposium

作者： Quan-You Qu Kun-Yi Guo Xin-Qing Sheng Jing Ma Bin Shi Cong-Jun Jin Center for Electromagnetic Simulation Beijing Institute of Techonology Beijing China Science and Technology on Space System Simulation Laboratory Beijing China

ISBN: (纸本)9781479978168

The scattering centers induced by creeping waves on cone-shaped targets are studied. Because of separated transmitters and receivers, the scattering centers could be observed in bistatic mode, especially under situation of large bistatic angles. Although induced by the same scattering mechanism, i.e., creeping waves, scattering centers on different profiles of cone-shaped targets have distinguished attributes. Attributes of scattering centers have been analyzed theoretically based on geometrical theory of diffraction, and investigated numerically by time-frequency representation of scattered signals.

关键词： Diffraction Time-frequency analysis Antennas Electromagnetic scattering Receivers Radar

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Research on the Integration and verification of Foundational Software and Hardware

Research on the Integration and verification of Foundational...

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SCIEI 2015 Paris Conference

作者： Jing Guo Lingda Wu Yashuai Lü Bo Li Ronghuan Yu the Science and Technology on Complex Electronic System Simulation Laboratory

Following the high-speed development of information technology,we increasingly attach important to the information *** development of independent self-controlled SW&HW(software and hardware) was *** to the faultiness of independent self-controlled industry,the integration and verification of foundational SW&HW must be largely *** the basis of analyzing the whole process of integration and verification of foundational SW&HW,the technology system was advanced,and the process,the content and the flow were provided,and the environment of integration and verification was constructed.

关键词： foundational SW&HW integration and verification technology system verification flow

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Community targets for JWST’s early release science program: Evaluation of WASP-63b

arXiv

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arXiv 2017年

作者： Kilpatrick, Brian M. Cubillos, Patricio E. Stevenson, Kevin B. Lewis, Nikole K. Wakeford, Hannah R. Macdonald, Ryan J. Madhusudhan, Nikku Blecic, Jasmina Bruno, Giovanni Burrows, Adam Deming, Drake Heng, Kevin Line, Michael R. Morley, Caroline V. Parmentier, Vivien Tucker, Gregory S. Valenti, Jeff A. Waldmann, Ingo P. Bean, Jacob L. Beichman, Charles Fraine, Jonathan Krick, J.E. Lothringer, Joshua D. Mandell, Avi M. Department of Physics Brown University Box 1843 ProvidenceRI02904 United States Space Research Institute Austrian Academy of Sciences Schmiedlstrasse 6 GrazA-8042 Austria Space Telescope Science Institute BaltimoreMD21218 United States Planetary Systems Lab NASA Goddard Space Flight Center GreenbeltMD20771 United States Institute of Astronomy University of Cambridge Madingley Road CambridgeCB3 0HA United Kingdom Department of Physics New York University Abu Dhabi P.O. Box 129188 Abu Dhabi United Arab Emirates Department of Astronomy University of Maryland College ParkMD20742 United States Department of Astronomy University of Maryland College ParkMD20742 United States University of Bern Center for Space and Habitability Sidlerstrasse 5 BernCH-3012 Switzerland School of Earth & Space Exploration Arizona State University PhoenixAZ85282 United States Department of Astronomy Harvard University CambridgeMA02138 United States Lunar & Planetary Laboratory University of Arizona TucsonAZ85721 United States Department of Physics & Astronomy University College London Gower Street WC1E6BT United Kingdom Department of Astronomy and Astrophysics University of Chicago 5640 S Ellis Ave ChicagoIL60637 United States NASA Exoplanet Science Institute California Institute of Technology Jet Propulsion Laboratory PasadenaCA United States Spitzer Science Center Infrared Processing and Analysis Center California Institute of Technology Mail Code 220-6 PasadenaCA91125 United States Solar System Exploration Division NASA Goddard Space Flight Center GreenbeltMD20771 United States

We present observations of WASP-63b by the Hubble space Telescope (HST) as part of "A Preparatory Program to Identify the Single Best Transiting Exoplanet for JWST Early Release science". WASP-63b is one of the community targets under consideration for the James Webb space Telescope (JWST) Early Release science (ERS) program. We present a spectrum derived from a single observation by HST Wide Field Camera 3 in the near infrared. We engaged groups across the transiting exoplanet community to participate in the analysis of the data and present results from each. Extraction of the transmission spectrum by several independent analyses find an H2O absorption feature with varying degrees of significance ranging from 1–3 σ. The feature, in all cases, is muted in comparison to a clear atmosphere at solar composition. The reasons for the muting of this feature are ambiguous due to a degeneracy between clouds and composition. The data does not yield robust detections of any molecular species other than H2O. The group was motivated to perform an additional set of retrieval exercises to investigate an apparent bump in the spectrum at ∼ 1.55 µm. We explore possible disequilibrium chemistry and find this feature is consistent with super-solar HCN abundance but it is questionable if the required mixing ratio of HCN is chemically and physically plausible. The ultimate goal of this study is to vet WASP-63b as a potential community target to best demonstrate the capabilities and systematics of JWST instruments for transiting exoplanet science. In the case of WASP-63b, the presence of a detectable water feature indicates that WASP-63b remains a plausible target for JWST observations. Copyright © 2017, The Authors. All rights reserved.

关键词： Extrasolar planets

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Ultrasensitive denoising imaging

Ultrasensitive denoising imaging

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JSAP-OSA Joint Symposia 2015

作者： Zhai, Guang-Jie Yu, Wen-Kai Zhao, Qing Key Laboratory of Electronics and Information Technology for Space System Center for Space Science and Applied Research Chinese Academy of Sciences Beijing100190 China College of Physics Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9784863485419

Traditional methods in remote spectral imaging usually cannot obtain images and spectra simultaneously, either rely on scene raster scanning or use an array sensor. Thus it is inevitable that the flux will be distributed evenly to the pixel dimension, resulting in a decline in the imaging sensitivity. To solve the problems, we proposed a compressive spectral imaging scheme with dual spatial light modulation. With the information of spectra and space both compressed, the spectral image of a colored object can be obtained by a single-photon point detector. Objects with both continuous and discrete spectrum are used to demonstrate the performance, which shows wide-spectrum and high efficiency in spectral imaging. Since this approach is based on the technique of single-pixel imaging, we have found a correlation between the samplings in both reflection arms of the digital micro-mirror, in view of which we propose a complementary way of double-pixel compressive imaging on denoising. In a telescopic system, this method can be used to retrieve images of a target with 20 cm resolution, obtaining an image in a higher quality of 1~2 orders than that acquired by the conventional single-pixel imaging scheme under the same sampling rate. Our results have shown that the above method has strong ability in producing high-quality images with fewer measurements, which leads to a broader prospect of applications in the remote-sensing area. © 2015 OSA - The Optical Society. All rights reserved.

关键词： Computational Imaging

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Integrated Condition Monitoring of space Information Network

Integrated Condition Monitoring of Space Information Network

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国防光电子论坛空间光信息与组网技术及应用研讨会

作者： WANG Zhilin LI Xinming LI Yachen YU Shaolin Science and Technology on Complex Electronic System Simulation Laboratory Equipment Academy

In order to solve the integrated condition monitoring problem in space information network, there are three works finished including analyzing the characteristics of tasks process and system health monitoring,adopting the automata modeling method, and respectively establishing the models for state inference and state determination. The state inference model is a logic automaton and is gotten by concluding engineering experiences. The state determination model is a double-layer automaton, the lower automaton is responsible for parameter judge and the upper automaton is responsible for state diagnosis. At last, the system state monitoring algorithm has been proposed, which realizes the integrated condition monitoring for task process and system health, and can avoid the false alarm.

关键词： space Information Network False Alarm Integrated Condition Monitoring Automation Model Discrete Event Dynamic system

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A Guided Fuzzing Approach for Security Testing of Network Protocol Software

A Guided Fuzzing Approach for Security Testing of Network Pr...

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2015 6th IEEE International Conference on Software Engineering and Service science(ICSESS 2015)

作者： Jun Cai Peng Zou Dapeng Xiong Jun He Science and Technology on Complex Electronic System Simulation Laboratory The Academy of Equipment

Software vulnerabilities are one of the root causes of network security issues. Software security testing is an essential part of secure software development. Fuzzing has been proven to be an effective dynamic software security testing method. In this paper we present a guided fuzzing approach based on dynamic taint analysis for security testing of network protocol software. This approach identifies the security sensitive functions of target application affected by network packets via dynamic taint analysis, and generates testcases by mutating these packets with the elements of a fuzz library. Due to the guidance of taint information, it to some extend overcomes the blindness of traditional fuzzing methods and improves efficiency. The approach integrates several successive steps, we currently focus on the taint analysis step and have received interesting preliminary experimental results.

关键词： software security testing guided fuzzing dynamic taint analysis

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Author Correction: The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data

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Scientific data 2021年第1期8卷 72页

作者： Gilberto Pastorello Carlo Trotta Eleonora Canfora Housen Chu Danielle Christianson You-Wei Cheah Cristina Poindexter Jiquan Chen Abdelrahman Elbashandy Marty Humphrey Peter Isaac Diego Polidori Markus Reichstein Alessio Ribeca Catharine van Ingen Nicolas Vuichard Leiming Zhang Brian Amiro Christof Ammann M Altaf Arain Jonas Ardö Timothy Arkebauer Stefan K Arndt Nicola Arriga Marc Aubinet Mika Aurela Dennis Baldocchi Alan Barr Eric Beamesderfer Luca Belelli Marchesini Onil Bergeron Jason Beringer Christian Bernhofer Daniel Berveiller Dave Billesbach Thomas Andrew Black Peter D Blanken Gil Bohrer Julia Boike Paul V Bolstad Damien Bonal Jean-Marc Bonnefond David R Bowling Rosvel Bracho Jason Brodeur Christian Brümmer Nina Buchmann Benoit Burban Sean P Burns Pauline Buysse Peter Cale Mauro Cavagna Pierre Cellier Shiping Chen Isaac Chini Torben R Christensen James Cleverly Alessio Collalti Claudia Consalvo Bruce D Cook David Cook Carole Coursolle Edoardo Cremonese Peter S Curtis Ettore D'Andrea Humberto da Rocha Xiaoqin Dai Kenneth J Davis Bruno De Cinti Agnes de Grandcourt Anne De Ligne Raimundo C De Oliveira Nicolas Delpierre Ankur R Desai Carlos Marcelo Di Bella Paul di Tommasi Han Dolman Francisco Domingo Gang Dong Sabina Dore Pierpaolo Duce Eric Dufrêne Allison Dunn Jiří Dušek Derek Eamus Uwe Eichelmann Hatim Abdalla M ElKhidir Werner Eugster Cacilia M Ewenz Brent Ewers Daniela Famulari Silvano Fares Iris Feigenwinter Andrew Feitz Rasmus Fensholt Gianluca Filippa Marc Fischer John Frank Marta Galvagno Mana Gharun Damiano Gianelle Bert Gielen Beniamino Gioli Anatoly Gitelson Ignacio Goded Mathias Goeckede Allen H Goldstein Christopher M Gough Michael L Goulden Alexander Graf Anne Griebel Carsten Gruening Thomas Grünwald Albin Hammerle Shijie Han Xingguo Han Birger Ulf Hansen Chad Hanson Juha Hatakka Yongtao He Markus Hehn Bernard Heinesch Nina Hinko-Najera Lukas Hörtnagl Lindsay Hutley Andreas Ibrom Hiroki Ikawa Marcin Jackowicz-Korczynski Dalibor Janouš Wilma Jans Rachhpal Jassal Shicheng Jiang Tomomichi Kato Myr Computational Research Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. gzpastorello@lbl.gov. DIBAF University of Tuscia Viterbo 01100 Italy. Euro-Mediterranean Centre on Climate Change Foundation (CMCC) Lecce 73100 Italy. Climate & Ecosystem Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. Computational Research Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. Department of Civil Engineering California State University Sacramento CA 95819 USA. Department of Geography Environment and Spatial Sciences Michigan State University East Lansing MI 48823 USA. Department of Computer Science University of Virginia Charlottesville VA 22904 USA. TERN Ecosystem Processes Menzies Creek VIC3159 Australia. Max Planck Institute for Biogeochemistry Jena 07701 Germany. Laboratoire des Sciences du Climat et de l'Environnement (LSCE) CEA CNRS UVSQ UPSACLAY Gif sur Yvette 91190 France. Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China. Department of Soil Science University of Manitoba Winnipeg MB R3T2N2 Canada. Department of Agroecology and Environment Agroscope Research Institute Zürich 8046 Switzerland. School of Geography and Earth Sciences McMaster University L8S4K1 Hamilton ON Canada. Department of Physical Geography and Ecosystem Science Lund University Lund 22362 Sweden. Department of Agronomy and Horticulture University of Nebraska-Lincoln Lincoln NE 68583 USA. School of Ecosystem and Forest Sciences The University of Melbourne Richmond VIC3121 Australia. Department of Biology Research Group PLECO University of Antwerp Antwerp 2610 Belgium. Joint Research Centre European Commission Ispra 21027 Italy. TERRA Teaching and Research Center University of Liege Gembloux B-5030 Belgium. Finnish Meteorological Institute Helsinki 00560 Finland. ES

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