MEX-M-MARSIS-3-RDR-AIS-EXT3

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 third extended 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. Ancillary Data No Ancillary data are provided. Coordinate System The data in this data set are measurements of wave electric fields measured by the MARSIS electric sensors. These fields are presented as detected by the sensors and are not rotated into any other coordinate system. If desired the SPICE kernels can be used with the SPICE toolkit to convert from the spacecraft frame to virtually an truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]

数据集概览 火星快车号火星高级雷达用于地下及活性电离层探测（MARSIS）数据集涵盖了火星快车号第三扩展任务期间，针对活性电离层探测器的所有经过校准的频谱信息，并以频谱密度单位表示。本数据集包含了每个发射事件的校准值以及对应于每个频率通道的时间数据。参数 本数据集包括通过电偶极子天线传感器获得的电场频谱密度。处理 数据集中的数据经过多个软件程序的处理。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了校准。如若校准得到显著改进，将在勘误表中予以注明。产品后续版本可能包含更佳的校准。数据 AIS校准的全分辨率数据集包括多个作为时间函数的波形频谱的二进制表，这些表记录了来自各种发射事件的数据。每个表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频谱密度列。发射频率的数量在每个帧中保持恒定，为每帧160个频率。辅助数据 无辅助数据提供。坐标系 本数据集中的数据为通过MARSIS电传感器测量的波电场测量值。这些场强以传感器检测到的形式呈现，且未旋转到任何其他坐标系中。如需将航天器坐标系转换为虚拟的截断坐标系，请使用SPICE工具包中的SPICE内核，具体内容请参阅实际数据[截断，请参阅实际数据全文]。