MEX-M-MRS-1-2-3-PRM-0604

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 Global Gravity measurement covering the time 20051120T11:51:16.000 to 20051120T14:02:35.000. This data set was collected during the MEX Mission Prime Mission Phase (PRM) 20042005. This is a measurement of the Global Gravity field of Mars. Global gravity measurements were typically done when Mars Express was around Apocenter. 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 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）无线电科学（MaRS）数据存档是一项按时间顺序排列的原始及部分处理数据集合，这些数据是在火星任务期间收集的。关于拟进行的调查信息，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2005年11月20日11时51分16秒至2005年11月20日14时02分35秒的时间段的全球重力测量。该数据集是在MEX任务初级任务阶段（PRM）2004至2005年期间收集的。这是对火星全球重力场的测量。全球重力测量通常在火星快车号位于远日点附近时进行。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。其中，需要区分在远日点附近进行的全球重力测量和在近日点附近针对有趣地质结构的重力测量。更多信息请参阅INST.CAT或MaRS用户手册MARSUSERMANUAL2004。对于所有测量，除非另有说明，否则使用搭载在航天器上的应答器1。应答器2被设计为备用。任务阶段定义
应予以注意的是，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一致性。这些任务阶段缩写也用于数据集ID的数据描述字段。MaRS任务名称 | 缩写 | 时间跨度
近地验证 | NEV | 2003年6月2日至2003年7月31日
巡航1 | CR1 | 2003年8月1日至2003年12月25日
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