MEX-M-MRS-1-2-3-PRM-0653

Data Set Overview The Mars Express (MEX) Radio Science (MaRS) Data Archive is a timeordered collection of raw and partially processed data collected during the MEX Mission to Mars. For more information on the investigations proposed see the MaRS User Manual MARSUSERMANUAL2004 in the MaRS DOCUMENT/MRS_DOC folder. This is a Occultation measurement covering the time 20051204T14:29:44.000 to 20051204T14:57:34.000. This data set was collected during the MEX Mission Prime Mission Phase (PRM) 20042005. There were three types of scientific measurements conducted during PRM: Occultation, Bistatic Radar and Gravity where one has to distinguish between global gravity measurements which were conducted around apocenter and target gravity measurements which were conducted around pericenter over interesting geophysical structures. For more information see INST.CAT or the MaRS User Manual MARSUSERMANUAL2004. For all measurements if not indicated otherwise Transponder 1 onboard the s/c was used. Transponder 2 is designed to be a backup. Mission Phase Definition It should be noted that the Mars Express (MEX) Radio Science (MaRS) group uses mission phases which deviate from the ones defined in the MISSION.CAT files given by ESA in order to keep the keywords and abbreviations consistent for Mars Express, Venus Express and Rosetta. Those mission phase abbreviations are also used in the data description field of the dataset_id. MaRS mission name | abbreviation | time span Near Earth Verification | NEV | 20030602 20030731 Cruise 1 | CR1 | 20030801 20031225 Mission Comissioning | MCO | 20031226 20040630 Prime Mission | P truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]

数据集概览：火星快车号（Mars Express，简称MEX）的无线电科学（MaRS）数据存档是一系列按时间顺序排列的原始及部分处理数据，这些数据是在火星任务期间收集的。关于所提议的调查，请参阅MaRS用户手册MARSUSERMANUAL2004，位于MaRS文档/MRS_DOC文件夹中。本数据集涵盖了20051204T14:29:44.000至20051204T14:57:34.000之间的掩星测量。该数据集是在MEX任务的首航任务阶段（PRM）20042005期间收集的。在PRM期间进行了三种类型的科学测量：掩星、双站雷达和重力测量。其中，全球重力测量是在远地点附近进行的，而目标重力测量是在近地点附近针对有趣的地球物理结构进行的。详细信息请参阅INST.CAT或MaRS用户手册MARSUSERMANUAL2004。除非另有说明，所有测量均使用搭载在卫星上的应答器1进行。应答器2被设计为备用。任务阶段定义：值得注意的是，火星快车号（MEX）无线电科学（MaRS）小组使用的任务阶段与ESA提供的MISSION.CAT文件中定义的任务阶段有所不同，以便保持火星快车号、金星快车号和罗塞塔号的关键词和缩写的统一性。这些任务阶段缩写也用于dataset_id的数据描述字段。MaRS任务名称 | 缩写 | 时间跨度
近地验证 | NEV | 20030602 - 20030731
巡航1 | CR1 | 20030801 - 20031225
任务启动 | MCO | 20031226 - 20040630
首航任务 | P
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