MEX-M-MRS-1-2-3-EXT2-3152

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 20111010T21:58:59.500 to 20111011T00:39:44.500. 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）数据档案库，系按照时间顺序排列的原始及部分处理数据集合，这些数据在火星任务期间被收集。关于拟进行的调查信息，请参阅MaRS用户手册MARSUSERMANUAL2004，位于MaRS文档夹/MRS_DOC中。本数据集涵盖全球重力测量，时间范围为20111010T21:58:59.500至20111011T00:39:44.500。该数据集收集于MEX扩展任务第二阶段（EXT2）2007年至待定期间。该数据集测量的是火星的全局重力场。全局重力测量通常在火星快车号接近远日点时进行。在扩展任务期间进行了四种类型的科学测量：日凌、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、在火星近地轨道上的全局重力测量以及围绕火星有趣地质结构附近的近地轨道重力测量。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器1。应答器2作为备份设计。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文件中定义的阶段有所不同，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，使用其他定义。这些任务阶段缩写也用于数据集_id的数据描述字段。MaRS任务名称 | 缩写 | 时间范围
近地轨道验证 | NEV | 20030602 20030731 截断！请参阅实际数据以获取全文 [截断！请参阅实际数据以获取全文]