CH1ORB-L-SIR2-2-NPO

Contents 1 Data set description 1.1 Data set overview 1.2 Parameters 1.3 Processing 1.4 Data 1.5 Ancillary data 1.6 Coordinate system 1.7 Software 1.8 Media/Format 2 Confidence level note 2.1 Confidence level overview 2.2 Review 2.3 Data quality 2.4 Pointing accuracy 1. Data set description 1.1. Data set overview The data set contains spectra acquired with the SIR2 instrument aboard the CHANDRAYAAN1 spacecraft. SIR2 is a point spectrometer with 256 spectral channels. For details on the SIR2 instrument see the EAICD in the `DOCUMENT directory. 1.2. Parameters The measured parameter is spectral intensity. The unit is data number which has a value between 0 and 65535. 1.3. Processing No processing beyond unpacking has been applied to the telemetry data. 1.4. Data Each data product contains all data from one orbit. The data product may either contain only housekeeping data or housekeeping and science data, i.e., spectra, which is reflected in the filenames, cf. the file `AAREADME.TXT in the root directory. Each data product consists of an ASCII PDS label file and a FITS data file, which is plain ASCII for housekeeping data only or binary if science data is included. The actual data resides in the FITS file, while the label files provides a PDS compliant description of the data structure. The data is arranged in a PDS table object, where each line represents one measurement instance and the different columns represent different measured parameters. If a spectrum was taken, the complete 256 channel spectrum resides in one linecolumn cell of the table. For the details of the file format and a comprehensive description of the PDS labels, see the EAICD in the `DOCUMENT directory. 1.5. Ancillary data No particular ancillary data is needed to interpret the data. 1.6. Coordinate system Right ascension and declination are given in the J2000 frame. Lunar latitudes and longitudes are given in the lunar `mean Earth reference frame t [truncated!, Please see actual data for full text]

{'Contents': '目录', '1 Data set description': '1 数据集描述', '1.1 Data set overview': '1.1 数据集概览', 'The data set contains spectra acquired with the SIR2 instrument aboard the CHANDRAYAAN1 spacecraft.': '本数据集收录了搭载于CHANDRAYAAN1航天器上的SIR2仪器所采集的光谱数据。', 'SIR2 is a point spectrometer with 256 spectral channels.': 'SIR2是一种具有256个光谱通道的点光谱仪。', 'For details on the SIR2 instrument see the EAICD in the `DOCUMENT directory.': '有关SIR2仪器的详细信息，请参阅`DOCUMENT目录中的EAICD。', '1.2. Parameters': '1.2 参数', 'The measured parameter is spectral intensity. The unit is data number which has a value between 0 and 65535.': '测量的参数为光谱强度。单位为数据数，其值介于0至65535之间。', '1.3. Processing': '1.3 处理', 'No processing beyond unpacking has been applied to the telemetry data.': '对遥测数据未进行除解包之外的处理。', '1.4. Data': '1.4 数据', 'Each data product contains all data from one orbit.': '每个数据产品包含一个轨道上的所有数据。', 'The data product may either contain only housekeeping data or housekeeping and science data, i.e., spectra, which is reflected in the filenames, cf. the file `AAREADME.TXT in the root directory.': '数据产品可能仅包含维护数据，或包含维护和科学数据，即光谱数据，这在文件名中有所体现，参见根目录中的文件`AAREADME.TXT`。', 'Each data product consists of an ASCII PDS label file and a FITS data file, which is plain ASCII for housekeeping data only or binary if science data is included.': '每个数据产品由一个ASCII PDS标签文件和一个FITS数据文件组成，其中维护数据为纯ASCII格式，若包含科学数据则为二进制格式。', 'The actual data resides in the FITS file, while the label files provides a PDS compliant description of the data structure.': '实际数据位于FITS文件中，而标签文件提供了符合PDS规范的数据结构描述。', 'The data is arranged in a PDS table object, where each line represents one measurement instance and the different columns represent different measured parameters.': '数据按PDS表格对象排列，其中每行代表一次测量实例，不同的列代表不同的测量参数。', 'If a spectrum was taken, the complete 256 channel spectrum resides in one line-column cell of the table.': '若采集了光谱，完整的256通道光谱将位于表格的一个行-列单元格中。', 'For the details of the file format and a comprehensive description of the PDS labels, see the EAICD in the `DOCUMENT directory.': '有关文件格式详情和PDS标签的全面描述，请参阅`DOCUMENT目录中的EAICD。', '1.5. Ancillary data': '1.5 辅助数据', 'No particular ancillary data is needed to interpret the data.': '解释数据不需要特定的辅助数据。', '1.6. Coordinate system': '1.6 坐标系统', 'Right ascension and declination are given in the J2000 frame.': '赤经和赤纬以J2000坐标系给出。', 'Lunar latitudes and longitudes are given in the lunar `mean Earth reference frame t [truncated!, Please see actual data for full text]': '月球纬度和经度以月球`平均地球参考坐标系给出[截断！，请参阅实际数据以获取完整文本]。'}