MEX-M-MRS-1-2-3-PRM-0662

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 20051209T12:36:38.500 to 20051209T15:58:40.000. This data set was collected during the MEX Mission Prime Mission Phase (PRM) 20042005. 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 PRM: 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, Venus Express and Rosetta. 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：火星快车号（Mars Express，简称MEX）无线电科学（MaRS）数据存档是一个按时间顺序排列的原始数据及部分处理数据集合，这些数据是在火星探测任务期间收集的。关于拟进行的调查，请参阅MaRS用户手册MARSUSERMANUAL2004，该手册位于MaRS文档夹的/MRS_DOC目录下。这是一组覆盖时间范围从20051209T12:36:38.500至20051209T15:58:40.000的全局重力测量数据。该数据集是在MEX任务的主任务阶段（PRM）20042005期间收集的。这是对火星全局重力场的测量。全局重力测量通常在火星快车号接近远地点时进行。在PRM阶段，共进行了三种类型的科学测量：掩星、双站雷达和重力测量，其中需要区分在远地点附近进行的全局重力测量和在近地点附近针对特定地质结构的重力测量。详细信息请参阅INST.CAT或MaRS用户手册MARSUSERMANUAL2004。除非另有说明，否则所有测量均使用搭载在卫星上的应答器1进行。应答器2被设计为备份。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文件中定义的任务阶段有所不同，目的是为了保持火星快车号、金星快车号和罗塞塔号的术语和缩写的一致性。这些任务阶段的缩写也用于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
[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]