MEX-M-MARSIS-3-RDR-AIS-EXT5

Data Set Overview The Mars Express Mars Advanced Radar for Subsurface and Active Ionospheric Sounding (MARSIS) data set includes all spectral information calibrated in units of spectral density for the Active Ionospheric Sounder over the Mars Express mission. This data set includes calibrated values for each transmit event and the corresponding temporal data for each frequency channel. Parameters This data set comprises the electric field spectral densities obtained via the electric dipole antenna sensor. Processing Data in this data set were processed by the use of a number of software programs. These programs reassembled and decompressed the raw telemetry data. These raw values were then calibrated into physical units: power received by the electric antenna. The data products were calibrated using the best calibration tables and algorithms available at the time of data archiving. Should a significant improvement in calibration become available, an erratum will be noted in the erratum section. Later versions of the products may contain better calibrations. Data The AIS calibrated full resolution data set includes several binary tables of wave spectra as a function of time from each of the various transmit events. Each table will contain fixedlength records including columns for time, transmit frequency, and spectral densities from the temporal measurements. The number of transmit frequencies is constant at 160 frequencies per frame and the number of samples per transmit frequency is constant at 80 per transmit pulse. Interpreting the provided intensities as remote emissions requires knowledge of the time delay between the emitted pulse and the measured electric spectral density. The time offsets from the onset of the transmit pulse until the measurement of each spectral density value may be found from the relation: delay time (microseconds) 162.5 + 91.4286 * item wher truncated!, Please see actual data for full [truncated!, Please see actual data for full text]

数据集概述 火星快车号火星高级雷达用于地下和活动电离层探测（MARSIS）数据集涵盖了火星快车号任务期间活动电离层探测器的所有光谱信息，并已校准至光谱密度单位。此数据集包括每个发射事件的校准值以及每个频率通道对应的对应时间数据。参数 此数据集包括通过电偶极子天线传感器获得的电场光谱密度。处理 数据集中的数据经过多种软件程序处理。这些程序重新组装并解压缩了原始遥测数据。随后，这些原始值被校准为物理单位：电天线接收到的功率。数据产品使用当时数据归档时最佳的校准表和算法进行校准。如校准有显著改进，将在勘误部分注明。后续版本的产品可能包含更好的校准。数据 校准后的AIS全分辨率数据集包括多个二进制表格，表格中展示了随时间变化的波谱，这些表格记录了来自各种发射事件的数据。每个表格将包含固定长度的记录，包括时间、发射频率以及时间测量的光谱密度等列。每个帧的发射频率数固定为160，每个发射脉冲的样本数固定为80。将提供的强度解释为远程辐射需要了解发射脉冲与测量的电光谱密度之间的时间延迟。从发射脉冲开始到测量每个光谱密度值的时间偏移可从以下关系中找到：延迟时间（微秒）= 162.5 + 91.4286 * item（其中！截断，请参阅实际数据以获取完整文本）