MEX-M-MRS-1-2-3-EXT2-3084

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 20110820T06:11:51.500 to 20110820T09:29:56.500. 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]

数据集概览：火星快车（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。关于提议的调查信息，请参阅MaRS用户手册MARSUSERMANUAL2004，该手册位于MaRS文档/MRS_DOC文件夹中。该数据集覆盖了从20110820T06:11:51.500至20110820T09:29:56.500的时间段，是一项全球重力测量。该数据集是在MEX扩展任务第二阶段（EXT2）2007年至待定期间收集的。该数据集旨在测量火星的全球重力场。通常在火星快车位于远地点附近时进行全球重力测量。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。在这些测量中，必须区分在火星卫星火卫一上进行的重力测量、在火星上进行的全球重力测量（在远地点附近进行）以及围绕火星上有趣地质结构的近地点进行的重力测量。更多信息请参见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被设计为备份。任务阶段定义：需要注意的是，火星快车（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，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。MaRS任务名称 | 简称 | 时间跨度 近地验证 | NEV | 20030602至20030731，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]