MEX-M-MRS-1-2-3-EXT2-1394

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 Target Gravity measurement covering the time 20071219T18:04:28.500 to 20071219T18:46:38.500. This data set was collected during the MEX Extended Mission Phase (EXT2) 20062007. This is a Target Gravity on Mars. These kind of measurements were typically conducted during Mars Express pericenter over interesting geophysical structures like Tempe Fossae or Olympus Mons. This particular measurement was conducted over Pavonis. 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 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，系按时间顺序排列的原始及部分处理数据集合，这些数据在火星快车任务期间收集。关于提议的调查，请参阅MaRS用户手册MARSUSERMANUAL2004，位于MaRS文档/MRS_DOC文件夹中。本数据集涵盖了从20071219T18:04:28.500至20071219T18:46:38.500的时间段，针对目标重力进行测量。此数据集在MEX扩展任务阶段（EXT2）2006至2007年间收集。这是火星上的目标重力测量。此类测量通常在火星快车近地点，针对诸如特梅普峡谷或奥林帕斯山等有趣的地质结构进行。此次测量是在帕沃尼斯地区进行的。在扩展任务期间，共进行了三种类型的科学测量：掩星、双站雷达和重力。在这些测量中，需区分全球重力测量（在远地点进行）和针对有趣地质结构的目标重力测量（在近地点进行）。更多信息请参阅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：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，目的是为了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的数据描述字段中。MaRS任务名称 | 缩写 | 时间范围
近地验证 | NEV | 20030602至20030731（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]