Densities derived from precise orbit determination of the Mars Odyssey and MRO satellites

This data set consist of daily mass densities derived from precise orbit determination of the Mars Reconnaissance Orbiter (MRO) satellite at 251 km and the Mars Odyssey (MO) satellite at 412 km. The data encompass 2006-2020 (MRO) and 2002-2020 (MO). Both satellites are in low-eccentricity near-polar day/night Sun-synchronous orbits. Also included are auxiliary data sets consisting of daily 10.7 cm solar radio fluxes adjusted to Mars orbit, and daily values of column dust optical depth from TES and THEMIS nadir observations integrated over all longitudes and between 0º and 90ºS latitude More details are found in the README.txt file. This data set is made available in connection with the following publication: Forbes, J.M., Bruinsma, S.L., Zhang, X., Marty, J.-C., Laurens, S. (2024). Long-term Variability of Mars’ Exosphere Density Based on Precise Orbital Analysis of Mars Reconnaissance Orbiter and Mars Odyssey. Geophysical Research Letters, 51. https://doi.org/10.1029/2023GL107044本数据集包含基于火星勘测轨道飞行器（Mars Reconnaissance Orbiter, MRO）在251千米轨道、火星奥德赛（Mars Odyssey, MO）在412千米轨道开展精密定轨后推导得到的每日大气质量密度数据。数据覆盖时段为2006年至2020年（MRO）及2002年至2020年（MO）。两颗卫星均运行于低偏心率近极区昼夜太阳同步轨道。 配套辅助数据集亦包含其中：一是经火星轨道校准的每日10.7厘米太阳射电通量数据；二是由TES与THEMIS天底观测数据经全经度范围及南纬0°至90°区间积分得到的柱沙尘光学密度日值。 更多详细信息可参见README.txt文件。 本数据集的发布关联以下学术论文： Forbes, J.M.、Bruinsma, S.L.、Zhang, X.、Marty, J.-C.、Laurens, S.（2024）。基于火星勘测轨道飞行器与火星奥德赛精密轨道分析的火星外逸层长期变化特性。《地球物理研究快报》，第51卷。https://doi.org/10.1029/2023GL107044