MEX-M-MRS-1-2-3-EXT3-3418

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 see the MaRS User Manual MARSUSERMANUAL2004 in the MaRS DOCUMENT/MRS_DOC folder. This is a Global Gravity measurement covering the time 20121005T06:03:14.000 to 20121005T09:55:43.500. This data set was collected during the MEX Extended Mission Phase 3 (EXT3) 2010 to 2012. 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 four types of scientific measurements conducted during Extended Mission: Solar Conjunction, Occultation, Bistatic Radar and Gravity where one has to distinguish between gravity measurements conducted on Phobos as well as global gravity measurements on Mars which were conducted around apocenter and target gravity measurements on Mars 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, and Rosetta. For Venus Express other definitions are used. 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 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）射电科学（MaRS）数据档案库系对火星任务期间收集的原始及部分处理数据进行时间排序的集合。关于调查的更多信息，请参阅MaRS用户手册《MARSUSERMANUAL2004》，位于MaRS文档夹下的/MRS_DOC文件夹。该数据集覆盖了从20121005T06:03:14.000至20121005T09:55:43.500的时间段的全球重力测量。该数据集是在MEX扩展任务第三阶段（EXT3）2010至2012年间收集的。此数据集旨在测量火星的全局重力场。全局重力测量通常在火星快车号接近远地点时进行。在扩展任务期间，共进行了四种类型的科学测量：太阳联合、掩星、双站雷达和重力测量。在此过程中，需区分在火卫一上进行的重力测量、在火星远地点附近进行的全球重力测量以及在火星近地点附近对有趣地质结构进行的重力测量。更多详细信息请参阅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机1。应答机2设计为备用。任务阶段定义：值得注意的是，火星快车号（MEX）射电科学（MaRS）小组使用的任务阶段与ESA提供的《MISSION.CAT》文件中定义的不同，以保持火星快车号和罗塞塔号的关键词和缩写的一致性。对于金星快车号，则使用其他定义。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 | 时间范围
火星快车号任务 | NEV | 20030602 20030731（截断！请参阅实际数据以获取完整文本 [截断！请参阅实际数据以获取完整文本]）