MEX-M-MRS-1-2-3-EXT3-3364

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 20121018T01:39:36.000 to 20121018T04:38:22.500. 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]

数据集概述：火星快车号（Mars Express，简称MEX）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，这些数据在火星探测任务期间收集。关于调查的更多信息，请参阅MaRS用户手册MARSUSERMANUAL2004，该手册位于MaRS文档/MRS_DOC文件夹中。该数据集涵盖了20121018T01:39:36.000至20121018T04:38:22.500时间段的全球重力测量。该数据集是在MEX扩展任务第3阶段（EXT3）2010至2012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接近远地点时进行。在扩展任务期间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。在重力测量方面，需要区分在火星的卫星火卫一上进行的重力测量以及在全球范围内进行的重力测量，这些测量是在接近远地点时进行的，还有在火星上的目标重力测量，这些测量是在接近近日点且位于有趣的地貌结构附近进行的。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。这些任务阶段的缩写也用于dataset_id的数据描述字段中。MaRS任务名称 | 缩写 | 时间跨度
火星快车号MaRS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]