MEX-M-MRS-1-2-3-MCO-0089

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 20040623T18:55:00 to 20040623T19:10:00. This data set was collected during the MEX Mission Comissioning Phase (MCO) during the first 6 months the spacecraft was in orbit around Mars. This is a radio occultation ingress measurement of the Martian atmosphere. It was done prior entering occultation by the planet during the first occultation season from 20040329 to 20040812. There were three types of scientific measurements conducted during MCO: 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. One exception are the data from the 20040123 (DOY 23/2004). This was not really a science measurement but rather a pure comissioning measurement. The so called TWODX procedure was supposed to assess the influence of telemetry on the background frequency noise after arrival at mars. The activity was planned with an Xband uplink and a dualfrequency Xand Sband downlink for a length of three hours with One hour TM and RNG ON; 1100 1200 UT One hour TM and RNG OFF (pure carrier), 1200 1300 UT One hour of TM and RNG ON; 1300 1400 UT Data were recorded at ESA New Norcia ground station. Ranging was only for XBand available. Please note: Because of an anomaly with the star tracker, the telemetry was not switched off between 1200 and 1300 UT. !!!!!!!!!!!!!!!!!!! truncated!, Please see actual data for [truncated!, Please see actual data for full text]

数据集概述：火星快车号（Mars Express，简称MEX）射电科学（MaRS）数据档案是一个按时间顺序排列的原始和部分处理数据的集合，这些数据是在火星快车号火星任务期间收集的。有关提出的调查的更多信息，请参阅MaRS用户手册《MARSUSERMANUAL2004》，该手册位于MaRS文档夹中的/MRS_DOC文件夹。本数据集覆盖了20040623T18:55:00至20040623T19:10:00的时间段，属于掩星测量。该数据集是在火星快车号任务启动阶段（MCO）期间，即飞船环绕火星的前六个月内收集的。这是对火星大气进行的无线电掩星进入测量，它发生在首次掩星季节（20040329至20040812）期间，即在进入掩星前对行星的测量。在MCO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，其中需要区分全球重力测量（在远地点周围进行）和目标重力测量（在近地点周围针对有趣的地球物理结构进行）。更多信息请参阅INST.CAT或MaRS用户手册《MARSUSERMANUAL2004》。一个例外是20040123（DOY 23/2004）的数据。这并非真正的科学测量，而是一种纯启动测量。所谓的TWODX程序旨在评估到达火星后遥测对背景频率噪声的影响。该活动计划使用X波段上行链路和双频段X和S波段下行链路，持续时长为三小时，其中一小时为TM和RNG开启；1100至1200 UTC为一小时TM和RNG关闭（纯载波），1200至1300 UTC为一小时TM和RNG开启；1300至1400 UTC。数据由ESA纽诺西亚地面站记录。仅X波段可用进行测距。请注意：由于星跟踪器出现异常，在1200至1300 UTC之间遥测未关闭。!!!!!!!!!!!!!!!!!!!!! 截断！，请参阅实际数据以获取完整文本。