MEX-M-MRS-1-2-3-EXT2-3134

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 20110926T00:04:08.500 to 20110926T04:41:55.500. This data set was collected during the MEX Extended Mission Phase 2 (EXT2) 2007 to tbd. 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）数据档案汇集了在火星任务期间收集的原始及部分处理数据。关于所提议的调查，请参阅MaRS用户手册MARSUSERMANUAL2004，位于MaRS文档/MRS_DOC文件夹中。本数据集覆盖了20110926T00:04:08.500至20110926T04:41:55.500的时间段，是一项全球重力测量。该数据集收集于MEX扩展任务第二阶段（EXT2）2007年至待定时间。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，共进行了四种科学测量：太阳联合观测、掩星、双站雷达和重力测量，其中需区分在火星卫星佛波斯上进行的重力测量、在火星全球重力场测量以及在近地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：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 | 时间段
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]