MEX-M-MRS-1-2-3-PRM-0300

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 20050221T22:14:21.000 to 20050222T01:07:00.000. 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）数据档案库系按时间顺序收集的原始及部分处理数据集，这些数据是在火星快车号任务期间采集的。有关所提议的调查信息，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20050221T22:14:21.000至20050222T01:07:00.000的时间段，是一项全球重力测量。该数据集是在火星快车号任务的初级任务阶段（PRM）2004-2005年期间采集的。这组测量数据旨在测定火星的全球重力场。全球重力测量通常在火星快车号接近远地点时进行。在PRM期间进行了三种类型的科学测量：掩星、双站雷达和重力测量。在远地点周围进行的全球重力测量与在近地点周围针对特定地球物理结构的重力测量需进行区分。更多信息请参见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航天器上的应答器1进行。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文件中定义的任务阶段有所不同，以保持火星快车号、金星快车号和罗塞塔号的关键词和缩写的一致性。这些任务阶段缩写也用于数据集_id的数据描述字段中。MaRS任务名称 | 缩写 | 时间段
火星快车号无线电科学 | MaRS | 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]