当前位置: X-MOL 学术Radio Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Tomographic Radio Occultation Methods Applied to a Dense Cubesat Formation in Low Mars Orbit
Radio Science ( IF 1.6 ) Pub Date : 2021-06-14 , DOI: 10.1029/2020rs007199
Gregor Moeller 1, 2 , Chi O. Ao 1 , Anthony J. Mannucci 1
Affiliation  

The atmospheric measurements made by the eight Mars orbiters in operation (as of April 2021) significantly improved our understanding of the Martian weather and climate. However, while some of the existing Mars orbiters will reach their lifetime, innovative and cost-effective observation concepts are requested – not only to guarantee continued observation but also to address potential gaps in the existing observing network. Inspired by the success of the two MarsCube One satellites we have established an observation concept, which is based on a series of cubesats, carried to Mars and injected into a low Mars orbit in a so-called string-of-pearls formation. Over the lifetime of the cubesats of about one Martian year, a series of radio occultation (RO) experiments will be carried out with up to 180 partially overlapping RO measurements per day. For processing of the unique set of observations, tomographic principles are applied to the RO measurements for the reconstruction of high-resolution two-dimensional temperature and pressure fields of the lower Martian atmosphere. Unlike the standard Abel transform approach, the derived products are not dependent on spherical symmetry assumptions. Thus, insights into various unresolved atmospheric phenomena are obtained – especially of those which are characterized by distinct horizontal gradients in pressure and temperature, for example, as observed at the day-night terminator, during dust storms, or over complex terrain.

中文翻译:

应用于低火星轨道密集立方体地层的断层扫描无线电掩星方法

八艘运行中的火星轨道飞行器(截至 2021 年 4 月)进行的大气测量显着提高了我们对火星天气和气候的了解。然而,虽然一些现有的火星轨道飞行器将达到其使用寿命,但仍需要创新且具有成本效益的观测概念——不仅是为了保证持续观测,而且是为了解决现有观测网络中的潜在差距。受两颗 MarsCube One 卫星成功的启发,我们建立了一个观测概念,该概念基于一系列立方体卫星,将其运送到火星并以所谓的珍珠串形式注入火星低轨道。在立方体卫星大约一个火星年的生命周期内,将进行一系列无线电掩星 (RO) 实验,每天进行多达 180 次部分重叠的 RO 测量。为了处理这组独特的观察结果,将断层扫描原理应用于 RO 测量,以重建低火星大气的高分辨率二维温度和压力场。与标准 Abel 变换方法不同,派生产品不依赖于球对称假设。因此,可以获得对各种未解决的大气现象的洞察——尤其是那些以明显的压力和温度水平梯度为特征的现象,例如,在昼夜终结者、沙尘暴期间或复杂地形上观察到的现象。与标准 Abel 变换方法不同,派生产品不依赖于球对称假设。因此,可以获得对各种未解决的大气现象的洞察——尤其是那些具有明显的压力和温度水平梯度特征的现象,例如,在昼夜终结者、沙尘暴期间或复杂地形上观察到的现象。与标准 Abel 变换方法不同,派生产品不依赖于球对称假设。因此,可以获得对各种未解决的大气现象的洞察——尤其是那些以明显的压力和温度水平梯度为特征的现象,例如,在昼夜终结者、沙尘暴期间或复杂地形上观察到的现象。
更新日期:2021-07-08
down
wechat
bug