MEX-M-MRS-1-2-3-PRM-0709

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 20051224T08:39:41.000 to 20051224T10:51:13.000. 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）数据档案汇集了在火星任务期间收集的原始及部分处理数据，这些数据按时间顺序排列。关于所提议的调查，请参阅MaRS用户手册MARSUSERMANUAL2004，该手册位于MaRS文档/MRS_DOC文件夹中。本数据集涵盖的全球重力测量时间为2005年12月24日08:39:41至10:51:13。该数据集是在火星快车号任务初级阶段（2004年至2005年）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接近远日点时进行。在初级阶段（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，其中需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特定地球物理结构的重力测量。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，否则使用在航天器上搭载的应答器1。应答器2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术语和缩写的一致性。这些任务阶段的缩写也用于数据集ID的数据描述字段中。MaRS任务名称 | 缩写 | 时间范围 近地验证 | NEV | 2003年6月2日至2003年7月31日 航程1 | CR1 | 2003年8月1日至2003年12月25日 [内容截断，请参阅实际数据以获取完整文本]