MEX-M-MRS-1-2-3-EXT2-2113

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 20090921T23:01:36.500 to 20090921T23:30:36.949. This data set was collected during the MEX Extended Mission Phase 2 (EXT2) 2007 to tbd. 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 Cruise 1 | CR1 | 20030801 20031225 Mission Commissioning | MCO | 20031226 20040630 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（Radio Science，简称MaRS）数据档案库是对火星任务期间收集的原始及部分处理数据的时序性汇编。关于所提议的调查，请参阅MaRS用户手册MARSUSERMANUAL2004，位于MaRS文档/MRS_DOC文件夹中。本数据集涵盖的掩星测量时间范围为20090921T23:01:36.500至20090921T23:30:36.949。该数据集收集于MEX扩展任务第二阶段（EXT2）2007年至待定时间。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，其中需区分围绕远地点进行的全球重力测量以及围绕近地点进行的针对特定地球物理结构的重力测量。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卫星的应答器1进行。应答器2设计为备用。任务阶段定义：应注意的是，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存在差异，以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 - 20030731
巡航1 | CR1 | 20030801 - 20031225
任务启动 | MCO | 20031226 - 20040630
[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]