MEX-M-MRS-1-2-3-EXT2-2464

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 Global Gravity measurement covering the time 20100612T10:27:07.500 to 20100612T12:18:12.500. This data set was collected during the MEX Extended Mission Phase 2 (EXT2) 2007 to tbd. This is a measurement of the Global Gravity field of Mars. Global gravity measurements were typically done when Mars Express was around Apocenter. 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 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）射电科学（MaRS）数据存档系按时间顺序收集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。欲了解更多关于拟议中的调查内容，请参阅MaRS用户手册MARSUSERMANUAL2004，该手册位于MaRS文档夹下的/MRS_DOC目录中。本数据集覆盖了20100612T10:27:07.500至20100612T12:18:12.500的时间段，属于全球重力测量。此数据集是在MEX扩展任务第二阶段（EXT2）2007年至待定日期期间收集的。该数据集测量了火星的全局重力场。全局重力测量通常在火星快车接近火星远地点时进行。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。其中，需区分在远地点附近进行的全局重力测量和在近地点附近针对有趣地球物理结构的靶重力测量。更多详细信息请参阅INST.CAT或MaRS用户手册MARSUSERMANUAL2004。除非另有说明，所有测量均使用在航天器上搭载的应答器1进行。应答器2作为备份设计。任务阶段定义：值得注意的是，火星快车（MEX）射电科学（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，以确保火星快车和罗塞塔任务的术语和缩写保持一致。对于金星快车，则使用其他定义。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 | 时间段：近地验证 | NEV | 20030602 - 20030731 航行1 | CR1 | 20030801 - 20031225 [截断！请参阅实际数据以获取完整内容]