MEX-M-MRS-1-2-3-PRM-0451

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 Occultation measurement covering the time 20050727T00:23:00.000 to 20050727T02:29:52.000. This data set was collected during the MEX Mission Prime Mission Phase (PRM) 20042005. 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 Mission Comissioning | MCO | 20031226 20040630 Prime Mission | P 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）数据档案是一系列按时间顺序排列的原始及部分处理数据，这些数据是在火星任务期间收集的。有关拟议的调查，请参阅MaRS用户手册MARSUSERMANUAL2004，该手册位于MaRS文档/MRS_DOC文件夹中。本数据集涉及20050727T00:23:00.000至20050727T02:29:52.000时间段的掩星测量。该数据集是在MEX任务初级任务阶段（PRM，20042005年）期间收集的。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。其中，需区分全球重力测量（在远地点附近进行）和目标重力测量（在近地点附近针对有趣的地球物理结构进行）。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器1进行。应答器2被设计为备用。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术语和缩写的一致性。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 | 时间范围
近地验证 | NEV | 20030602 - 20030731
巡航1 | CR1 | 20030801 - 20031225
任务调试 | MCO | 20031226 - 20040630
初级任务 | P（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]