MEX-M-MRS-1-2-3-EXT2-1372

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 20071028T22:43:38.500 to 20071028T23:50:54.500. 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 Hellas. 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：火星快车号（Mars Express，简称MEX）无线电科学（MaRS）数据档案收录了在火星任务期间收集的原始数据及部分处理数据，并按时间顺序排列。有关调查计划的详细信息，请参阅MaRS用户手册MARSUSERMANUAL2004，该手册位于MaRS文档夹下的MRS_DOC文件夹中。本数据集覆盖了2007年10月28日22时43分38.5秒至23时50分54.5秒的目标重力测量。该数据集是在MEX扩展任务阶段（EXT2）2006年至2007年期间收集的。这是对火星上的目标重力进行测量的数据。此类测量通常在火星快车号绕近地点飞越具有趣味地质结构的区域，如特梅普裂谷或奥林匹斯山进行。本次特定测量是在赫拉斯地区进行的。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。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（在近地点附近对有趣地质结构进行）。更多信息请参阅INST.CAT或MaRS用户手册MARSUSERMANUAL2004。对于所有测量，除非另有说明，否则使用在航天器上搭载的应答器1。应答器2设计为备份。任务阶段定义：需要注意的是，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文件中定义的不一致，这是为了保持火星快车号和罗塞塔号的关键词和缩写的一致性。对于金星快车号，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 | 2003年6月2日至2003年7月31日（截断！，请参阅实际数据以获取完整文本）