MEX-M-MRS-1-2-3-EXT3-3351

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 20120716T07:27:39.000 to 20120716T11:02:31.500. 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（Mars Express，简称MEX）射电科学（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，这些数据在火星快车任务期间收集。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。该数据集涵盖了20120716T07:27:39.000至20120716T11:02:31.500的时间段，为全球重力测量。该数据集是在火星快车扩展任务第3阶段（EXT3）2010至2012年期间收集的。这组测量了火星的全局重力场。全局重力测量通常在火星快车接近远地点时进行。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、双站雷达和重力测量。其中，需区分在火卫一上进行的重力测量以及火星全局重力测量（在远地点附近进行）和火星目标重力测量（在近地点附近针对有趣的地貌结构进行）。更多信息请参考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作为备用设计。任务阶段定义：需要注意的是，火星快车（MEX）射电科学（MaRS）小组使用的任务阶段与ESA提供的《MISSION.CAT》文件中定义的任务阶段有所不同，以保持火星快车和罗塞塔的关键词和缩写的一致性。对于金星快车，使用其他定义。这些任务阶段的缩写也用于数据集_id的数据描述字段。MaRS任务名称 | 缩写 | 时间跨度
近地验证 | NEV | 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]