MEX-M-MRS-1-2-3-EXT2-1966

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 20090607T15:39:30.500 to 20090607T18:29:57.500. 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 three types of scientific measurements conducted during Extended Mission: Occultation, Bistatic Radar and Gravity where one has to distinguish between global gravity measurements which were conducted around apocenter and target gravity measurements 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 Cruise 1 | CR1 | 20030801 20031225 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）数据档案库系按照时间顺序整理的原始数据及部分处理数据集合，这些数据是在火星快车任务期间收集的。有关所提议调查的更多信息，请参阅MaRS用户手册MARSUSERMANUAL2004，位于MaRS文档/MRS_DOC文件夹中。本数据集覆盖了从20090607T15:39:30.500至20090607T18:29:57.500的时间段的全球重力测量。此数据集是在火星快车扩展任务阶段2（EXT2）2007年至待定日期期间收集的。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接近火星远地点时进行。在扩展任务期间进行了三种类型的科学测量：掩星、双站雷达和重力。在此过程中，需要区分在远地点附近进行的全球重力测量和在近日点附近进行的针对特定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。除非另有说明，所有测量均使用搭载在航天器上的应答机1进行。应答机2作为备份设计。任务阶段定义：值得注意的是，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存在差异，以便保持火星快车和罗塞塔任务的关键词和缩写的一致性。对于金星快车，则使用其他定义。这些任务阶段缩写也用于dataset_id的数据描述字段中。MaRS任务名称 | 缩写 | 时间范围
近地验证 | NEV | 20030602 - 20030731
巡航1 | CR1 | 20030801 - 20031225
（请注意，部分内容被截断，完整内容请参阅实际数据）[内容被截断，完整内容请参阅实际数据]