The exploration of the Venus and Jupiter atmospheres by radio occultations: Extending our understanding of the planetary atmospheres beyond Fresnel scale resolution and spherical symmetry

通过射电掩星探索金星和木星大气层：将我们对行星大气层的理解扩展到菲涅尔尺度分辨率和球对称性之外

• 批准号: 523363587
• 负责人: Privatdozent Dr. Martin Pätzold
• 金额: --
• 依托单位: Graduate School of Frontier Sciences
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/523363587?language=en
• 关键词: exploration; Venus; Jupiter; atmospheres; radio

Current and future spacecraft missions will soon provide new opportunities for the scientific exploration of the atmospheres of Jupiter and Venus. The orbit of the extended Juno mission (2023-2025) eventually provides opportunities for Jupiter radio occultations. JUICE (launch planned for 2023) will explore Jupiter, its ring system, and the Galilean moons by radio science, while the new decade of Venus exploration will begin with two NASA missions (VERITAS: launch ~2028, DAVINCI, launch ~2029) and the ESA EnVision (launch ~2031) spacecraft. The Rheinisches Institut für Umweltforschung (RIU) is in leading position for the radio occultation part of both the EnVision mission at Venus and the JUICE mission at Jupiter. Crucial for the success of the atmospheric radio sounding are reliable prediction and data processing tools, but most important, a sound observation database from previous missions. The objectives of this proposal are: 1.) A 2D/3D forward raytracing software package shall be developed for the prediction and simulation of radio occultations in the non-spherical symmetric atmospheres of Venus and Jupiter. The raytracing software shall be used to analyze the effect of the Venus terminator on the Venus Express VeRa radio occultation data set (~1,000 observations), where atmospheric conditions change over short spatial scales and deviate from the local spherical symmetry assumed during data processing at RIU. The raytracing results shall be integrated in the Venus Express VeRa radio occultation data set and will lead to improved observations at the Venus terminator. The raytracing software shall also be used to study how the oblate Jovian atmosphere and the highly variable ionosphere affect radio occultation observations at Jupiter based on Galileo and the potential future Juno radio occultations. 2.) An upgrade of the currently used radio science data processing method at RIU shall be applied to increase the vertical resolution of the Venus Express VeRa atmospheric profiles to sub-Fresnel scales and remove the bias of multipath propagation effects from the data set. Multipath propagation effects occur also in the Jovian atmosphere and shall also be investigated and removed from the ionospheric Galileo radio science observations and the potential Juno occultations for Jupiter. 3.): The interpretation of the new information about sub-Fresnel scale atmospheric features and the effect of non-spherical symmetric atmospheres on radio occultations shall provide improved knowledge about atmospheric processes, a sound data base for the prediction of future radio science observation, they shall support atmospheric modeling efforts and advance the preparation for the EnVision mission to Venus and the JUICE mission to Jupiter.

当前和未来的航天器任务将很快为木星和金星大气的科学探索提供新的机会。扩展的朱诺任务（2023-2025）的轨道最终为木星无线电事件提供了机会。 Juice（计划于2023年发布）将探索木星，其戒指系统和无线电科学的Galilean Moons，而Venus探索的新十年将以两个NASA任务（Veritas：Veritas：Daunch〜2028，Davinci，Davinci，Launch 〜2029）和ESA Esa Envision（启动〜2031）SpaceCraft开始。莱茵河施特图特·乌姆维尔特福琴（RIU）在金星的设想任务和木星的果汁任务的广播事件部分处于领先地位。对于大气无线电发声的成功至关重要的是可靠的预测和数据处理工具，但最重要的是先前任务中的声音观察数据库。该提案的目标是：1。）应开发一个2D/3D向前的射线跟踪软件包，以预测和模拟金星和木星的非球员对称气氛中的无线电事件。射线疗法软件应用于分析金星终结器对金星快车无线电事件数据集的影响（〜1,000个观测值），其中大气条件在短空间尺度上发生变化，并偏离RIU数据处理过程中假定的局部球形对称性。射线跟踪结果应集成在Venus Express Vera无线电掩盖数据集中，并将导致在金星终结者的观察结果改善。射线疗法软件还应用于研究基于galileo的木星和潜在的未来Juno无线电掩盖的jovian气氛和高度可变的电离层影响无线电掩盖观测。 2.）应应用RIU的当前无线电科学数据处理方法的升级，以将Venus Express Vera大气谱的垂直分辨率提高到子屈服量表，并从数据集中消除多路径传播效应的偏见。多径传播效应也发生在Jovian大气中，还应从电离层伽利略无线电科学观察和木星的潜在JUNO职业中进行研究和去除。 3.）：解释有关亚救援尺度大气特征的新信息以及非球员对称大气对无线电事件的影响，应提供有关大气过程的改进知识，这是预测未来无线科学观察的合理数据基础，它们应支持大气建模工作并推动为Venus和Juice Mission to Juice启动任务的准备工作。