MEX-M-MRS-1-2-3-EXT2-1422

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 Bistatic Radar measurement covering the time 20080202T21:50:00 to 20080203T03:08:00. This data set was collected during the MEX Extended Mission Phase 2 (EXT2) 2007 to tbd. This is a Bistatic Radar measurement to determine surface properties of Mars. The measurement was done as the specific target was available under good observing conditions. The High Gain Antenna was pointed towards Mars (65.01 18.58). 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）数据档案库是按时间顺序排列的原始及部分处理数据集，这些数据是在火星快车号火星任务期间收集的。关于所提议的调查信息，请参阅MaRS用户手册MARSUSERMANUAL2004，位于MaRS文档/MRS_DOC文件夹中。这是一组双站雷达测量数据，覆盖时间从20080202T21:50:00至20080203T03:08:00。该数据集是在火星快车号扩展任务阶段2（EXT2）2007年至待定期间收集的。这是一项旨在确定火星表面特性的双站雷达测量。在特定目标在良好的观测条件下可用时进行了测量。高增益天线对准指向火星（经度65.01度，纬度18.58度）。在扩展任务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。在感兴趣的地貌结构周围，需要进行全球重力测量和目标重力测量的区分。更多详细信息请参阅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存在差异，以保持火星快车号、罗塞塔号的关键词和缩写的一致性。对于金星快车号，使用的是其他定义。这些任务阶段缩写也用于dataset_id的数据描述字段。MaRS任务名称 | 缩写 | 时间范围
近地验证 | NEV | 20030602 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]