Some standard content:
ICS07.040
National Standard of the People's Republic of China
GB/T33996—2017
Hierarchy and nomenclature of lunar exploration data products Issued on 2017-07-12
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on 2018-02-01
This standard was drafted in accordance with the rules given in GB/T1.1-2009 and proposed by the Chinese Academy of Sciences.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Space Science and Its Applications (SAC/TC312). Drafting unit of this standard: National Astronomical Observatory of the Chinese Academy of Sciences Main drafters of this standard: Liu Jianjun, Li Chunlai, Tan Xu, Ren Xin, Mou Lingli, Feng Jianqing, Zuo Wei. GB/T33996—2017
1 Scope
Lunar exploration data product classification and naming
This standard specifies the classification of lunar exploration data products and the naming rules for data files. This standard applies to the processing, management, sharing and application of lunar exploration data. Terms and definitions
The following terms and definitions apply to this document. 2.1
lunarexploration
Lunar exploration
GB/T33996—2017
Observation and sampling research activities on the material composition, surface characteristics, physical fields, internal structure, origin and evolution history of the moon with the help of probes orbiting or landing on the moon.
[GB/T30114.1—2013 definition 3.1.1]2.2
dataproduct
Data product
Effectively use data analysis methods to mine valuable information for users from massive amounts of original information, and provide digital information for user applications in an intuitive and effective form [GB/T30114.1—2013, definition 4, 32]2.3
Source packet data
packetdata
Application-oriented protocol standard data unit generated by the detection instrument. Note: Includes package protocol data unit and bit stream protocol data unit. 2.4
calibration
The process of determining the quantitative relationship between instrument measurement data and actual physical quantities through comparison, calibration, correction and other methods using known information determined by the value.
Note: Common calibrations include radiation calibration, energy spectrum calibration, geometric calibration, etc. [GB/T30114.1—2013, definition 4.37]2.5
Radiometric correction
Radiometric correction
Correction for systematic and random radiation distortion or aberration caused by external factors in the data acquisition and transmission system. [GB/T14950—2009, definition 5.195]2.6
selenometricpositioning
Lunar geometric positioningWww.bzxZ.net
Based on the ephemeris parameters, attitude parameters, and sensor parameters of the detector, while taking into account the lunar self-rotation, lunar shape, etc., through the conversion between various coordinate systems, the position of each sampling point of the sensor on the lunar surface and other related geometric parameters are determined. 1
GB/T33996—2017
fcoordinated universal time (UTC) Coordinated Universal Time
The time scale maintained by the International Bureau of Weights and Measures and the International Earth Rotation Service (IERS) is the basis for the coordinated broadcasting of various standard frequencies and time signals.
Note 1: This definition is derived from the International Telecommunication Union-Radio Consultative Committee (ITU-R) recommendation ITUTF.686. ITU-R also stipulates that UTC is the abbreviation of Coordinated Universal Time
Note 2: Coordinated Universal Time is often (incorrectly) referred to as Greenwich Mean Time (GMT). Note 3: For other information, please refer to the following websites:
International Telecommunication Union website: http://www.itu.int/itudoc/itu-r/rec/tf/index.html International Bureau of Weights and Measures website: http://www,bipm.fr International Earth Rotation Service website: http://www.iers.org/ [GB/T7408-2005, Definition 3.1]
Data Product Classification
Based on the function of data products and the users they are aimed at, the processing process of lunar exploration data products is divided into stages. Data products are divided into three levels, from low to high, namely level 0 data products, level 1 data products and level 2 data products. 3.2
Level 0 Data Products
Level 0 data products are source packet data and data collected by the detection instrument after the downlink data of the detector is processed by ground demodulation, frame synchronization, descrambling, channel decoding, unpacking, and decompression. It is the data collected by the detection instrument without correction and lunar surface geometric positioning. Level 0 data products are further divided into two sub-level data products, Level 0A and Level 0B, as described in Table 1. Table 10 Level Data Product Classification Table
Data Level
Level 0A Data Products
Level 0B Data Products
Level 1 Data Products
English Name
Level oA
Level oB
Data Description
is the source packet data of a single ground receiving station of each operating instrument after the detector's downlink data is processed by ground demodulation, synchronization, descrambling, channel decoding, and branching. On the basis of 0A-level data, multiple ground receiving stations merge (when applicable) and sort to remove duplication to form source packet data. These source packet data are removed from the packet structure and decompressed (when applicable) to form the data collected by each detection instrument.
Level 1 data products are based on 0B-level data products. The numerical conversion of instrument parameters such as temperature, voltage, and current is carried out, and the data is reorganized according to the detection cycle.
Note: For lunar satellites, one orbit is regarded as a detection cycle. period; for the lander in situ operation and measurement, one Earth day or one data transmission arc segment is regarded as a detection cycle; for the rover, the start of one detection point to the start of the next detection point (including the movement of the rover and the detection process of the detection point) is regarded as a detection cycle.
3.4 Level 2 data products
Level 2 data products are corrected based on the calibration results of Level 1 data products and provide data of geometric information. Level 2 data products are divided into two sub-levels of data products, Level 2A and Level 2B. See Table 2 for description. 2
Data level
Level 2A data products
Level 2B data products
English name
Level 2A
Level 2B
4 Naming rules for data product files
Table 22-level data product classification table
Data description
GB/T33996—2017
Based on level 1, products that are corrected using calibration results, such as radiation correction productsBased on level 2A, products that provide lunar surface geometric positioning informationData product file names are composed of 10 elements in sequence: mission identification, receiving station identification, detection instrument identification, data product type, data time characteristics, start time, end time, detection cycle abbreviation (or data transmission task number), product version number, and product level. The first 9 elements are connected by the following Separated by hyphens,
4.1.2 English letters in the file name are capitalized. 4.1.3 The format of the data product file name is CEx_st_pl_ty_dc_yyyymmddhhmiss_YYYYMMDDHHMISS_obver.lv. The definitions and rules of each element are shown in 4.2 to 4.11. For examples of data product file naming, see Appendix A. 4.2
Task identification
The task identification starts with CE, x is the task number, represented by a number, and is 1 character long. Afterwards, the detector identification can be added by separating by hyphens. The detector identification is abbreviated in uppercase letters and is 1 character long. 4.3
Receiving station identification
st is the receiving station identification, which is 4 characters long and indicates the ground receiving station of the data. It uses the English abbreviation. Detection instrument identification
pl is the abbreviation of the detection instrument. Afterwards, the working mode identification w and the detection data number ×××× can be added in sequence through the hyphen. The working mode is represented by letters or numbers, with a length of 1 character; the detection data number indicates the number after the detection instrument divides the data (such as scene division, frame division, etc.) in the same detection cycle and detection mode. It is represented by numbers with a length of 4 characters. If it is insufficient, 0 is added to the left end. 4.5
Data product type
ty is the data product type identifier, with a length of 3 characters, and its meaning is as follows: a)
Scientific data;
Engineering telemetry data;
Detection instrument engineering data;
Auxiliary data:
Attitude data;
Orbit data;
Quality data;
Calibration data.
Data time characteristics
dc is the data time characteristics identifier, with a length of 1 character and the value is: 3
GB/T33996—2017
Real-time data (data directly downlinked after data acquisition); R
b) P——playback data (data played back after being stored by the detector); c) N——including real-time data and playback data. 4.7
Start time
yyyymmddhhmiss is the time of the first data in the data, using Coordinated Universal Time (UTC), where yyyy represents year and has a length of 4 characters; mm represents month, dd represents day, hh represents hour, mi represents minute, ss represents second, all represented by 2 characters; if the length is insufficient, 0 is added to the left.
End time
YYYYMMDDHHMISS is the time of the last data packet in the data, using Coordinated Universal Time (UTC), where YYYY represents the year, with a length of 4 characters; MM represents the month, DD represents the day, HH represents the hour, MI represents the minute, and SS represents the second, all of which are represented by 2 characters; if the length is insufficient, 0 is added to the left.
Detection cycle/data transmission task number
For level 0 data products, ob is the data transmission task number, with a length of 4 characters, and 0 is added to the left if it is insufficient. For level 1 and level 2 data products, 0b is the detection cycle abbreviation, which is 4 characters long. If it is not enough, 0 is added to the left. 4.10
Product version number
ver is the product version, which is 1 character long and has values from "A" to "Z". The first version is "A", the second version is "\B", and so on. 4.11 Product level
1v is the product level, which is 2 characters long and has values: a)
0A-level data products;
-0B-level data products;
-1-level data products;
2A-level data products;
2B———2B-level data products.
Appendix A
(Informative Appendix)
Data product file naming example
Yida'e-3 Taking the panoramic camera as an example, the naming examples of scientific data product files are as follows: Example 1: CE3-R_BMGS_PCAMR_SCI_P_20131223114501_20131223124510_0001_A,0A Example 2: CE3_BMYK_PCAML-C_SCI_N_20131223114501_20131223124510_0001_A.01 Example 3: CE3_BMYK_PCAML-C-0001_SCI_N_20131223114501_20131223114501_0001_A.2A The elements in Example 1 are explained as follows:
"CE3-R" indicates the data of Chang'e 3 transmitted by the rover; a)|| tt||“BMGS\ indicates data received by Beijing Miyun Station; “PCAMR\ indicates panoramic camera (right camera); “SCI\ indicates scientific data;
“P\ indicates data that has been replayed in large capacity; GB/T33996—2017
“20131223114501 indicates that the time of the first data in the file is 11:45:01 on December 23, 2013; “20131223124510” indicates that the time of the last data in the file is 12:45:10 on December 23, 2013: “0001\ indicates the first data transmission task; “A” indicates version A;
“0A” indicates that the data level is 0A.
The elements in Example 2 are explained as follows:
"CE3" indicates the data from Di'e-3;
"BMYK\ indicates the data received by Beijing Miyun Station and Yunnan Kunming Station after being merged and deduplicated; "PCAML-C\ indicates the left camera of the panoramic camera, color mode; "SCI\ indicates scientific data;
"N\ indicates the data mixed after large-capacity playback and real-time download; "20131223114501" indicates that the start time of this detection cycle is 11:45:01 on December 23, 2013; "20131223124510\ indicates that the end time of this detection cycle is 12:45:10 on December 23, 2013; "0001\ indicates the first detection cycle; "A\ indicates version A;
"01\ indicates that the data level is 01.
The elements in Example 3 are explained as follows:
“CE3” represents the data from Di'e-3;
“BMYK\ represents the data received from Beijing Miyun Station and Yunnan Kunming Station after merging and deduplication; “PCAML-C-0001” represents the left camera of the panoramic camera, color mode, and the first image; “SCI\ represents scientific data;
“N\ represents the data mixed with large-capacity playback and real-time download; “20131223114501 represents the acquisition time of the image at 11:45:01 on December 23, 2013; “0001\ represents the first detection cycle; “A\ represents version A;
“2A” represents the data level is 2A.
GB/T33996—2017
GB/T7408—2005
GB/T14950—2009
GB/T17159—2009
References
Data elements and exchange formats
Information exchange
Photogrammetry and remote sensing terminology
Geodesy terminology
GB/T 30114.1—2013
Date and time representation
Terminology for space science and its applications
Part 1: Basic general
JPL D-7669, Planetary Data System Standards Reference Version 3.67
Start time
yyyymmddhhmiss is the time of the first data in the data, using the coordinated universal time (UTC), where yyyy represents the year, with a length of 4 characters; mm represents the month, dd represents the day, hh represents the hour, mi represents the minute, ss represents the second, all of which are represented by 2 characters; if the length is insufficient, 0 is added to the left.
End time
YYYYMMDDHHMISS is the time of the last data in the data, using the coordinated universal time (UTC), where YYYY represents the year, with a length of 4 characters; MM represents the month, DD represents the day, HH represents the hour, MI represents the minute, SS represents the second, all of which are represented by 2 characters; if the length is insufficient, 0 is added to the left.
Detection cycle/data transmission task number
For level 0 data products, ob is the data transmission task number, with a length of 4 characters, and 0 is added to the left if it is insufficient. For level 1 and level 2 data products, 0b is the detection cycle abbreviation, which is 4 characters long. If it is not enough, 0 is added to the left. 4.10
Product version number
ver is the product version, which is 1 character long and has values from "A" to "Z". The first version is "A", the second version is "\B", and so on. 4.11 Product level
1v is the product level, which is 2 characters long and has values: a)
0A-level data products;
-0B-level data products;
-1-level data products;
2A-level data products;
2B———2B-level data products.
Appendix A
(Informative Appendix)
Data product file naming example
Yida'e-3 Taking the panoramic camera as an example, the naming examples of scientific data product files are as follows: Example 1: CE3-R_BMGS_PCAMR_SCI_P_20131223114501_20131223124510_0001_A,0A Example 2: CE3_BMYK_PCAML-C_SCI_N_20131223114501_20131223124510_0001_A.01 Example 3: CE3_BMYK_PCAML-C-0001_SCI_N_20131223114501_20131223114501_0001_A.2A The elements in Example 1 are explained as follows:
"CE3-R" indicates the data of Chang'e 3 transmitted by the rover; a)|| tt||“BMGS\ indicates data received by Beijing Miyun Station; “PCAMR\ indicates panoramic camera (right camera); “SCI\ indicates scientific data;
“P\ indicates data that has been replayed in large capacity; GB/T33996—2017
“20131223114501 indicates that the time of the first data in the file is 11:45:01 on December 23, 2013; “20131223124510” indicates that the time of the last data in the file is 12:45:10 on December 23, 2013: “0001\ indicates the first data transmission task; “A” indicates version A;
“0A” indicates that the data level is 0A.
The elements in Example 2 are explained as follows:
"CE3" indicates the data from Di'e-3;
"BMYK\ indicates the data received by Beijing Miyun Station and Yunnan Kunming Station after being merged and deduplicated; "PCAML-C\ indicates the left camera of the panoramic camera, color mode; "SCI\ indicates scientific data;
"N\ indicates the data mixed after large-capacity playback and real-time download; "20131223114501" indicates that the start time of this detection cycle is 11:45:01 on December 23, 2013; "20131223124510\ indicates that the end time of this detection cycle is 12:45:10 on December 23, 2013; "0001\ indicates the first detection cycle; "A\ indicates version A;
"01\ indicates that the data level is 01.
The elements in Example 3 are explained as follows:
“CE3” represents the data from Di'e-3;
“BMYK\ represents the data received from Beijing Miyun Station and Yunnan Kunming Station after merging and deduplication; “PCAML-C-0001” represents the left camera of the panoramic camera, color mode, and the first image; “SCI\ represents scientific data;
“N\ represents the data mixed with large-capacity playback and real-time download; “20131223114501 represents the acquisition time of the image at 11:45:01 on December 23, 2013; “0001\ represents the first detection cycle; “A\ represents version A;
“2A” represents the data level is 2A.
GB/T33996—2017
GB/T7408—2005
GB/T14950—2009
GB/T17159—2009
References
Data elements and exchange formats
Information exchange
Photogrammetry and remote sensing terminology
Geodesy terminology
GB/T 30114.1—2013
Date and time representation
Terminology for space science and its applications
Part 1: Basic general
JPL D-7669, Planetary Data System Standards Reference Version 3.67
Start time
yyyymmddhhmiss is the time of the first data in the data, using Coordinated Universal Time (UTC), where yyyy represents year, with a length of 4 characters; mm represents month, dd represents day, hh represents hour, mi represents minute, ss represents second, all of which are represented by 2 characters; if the length is insufficient, 0 is added to the left.
End time
YYYYMMDDHHMISS is the time of the last data in the data, using Coordinated Universal Time (UTC), where YYYY represents year, with a length of 4 characters; MM represents month, DD represents day, HH represents hour, MI represents minute, SS represents second, all of which are represented by 2 characters; if the length is insufficient, 0 is added to the left.
Detection cycle/data transmission task number
For level 0 data products, ob is the data transmission task number, with a length of 4 characters, and 0 is added to the left if it is insufficient. For level 1 and level 2 data products, 0b is the detection cycle abbreviation, which is 4 characters long. If it is not enough, 0 is added to the left. 4.10
Product version number
ver is the product version, which is 1 character long and has values from "A" to "Z". The first version is "A", the second version is "\B", and so on. 4.11 Product level
1v is the product level, which is 2 characters long and has values: a)
0A-level data products;
-0B-level data products;
-1-level data products;
2A-level data products;
2B———2B-level data products.
Appendix A
(Informative Appendix)
Data product file naming example
Yida'e-3 Taking the panoramic camera as an example, the naming examples of scientific data product files are as follows: Example 1: CE3-R_BMGS_PCAMR_SCI_P_20131223114501_20131223124510_0001_A,0A Example 2: CE3_BMYK_PCAML-C_SCI_N_20131223114501_20131223124510_0001_A.01 Example 3: CE3_BMYK_PCAML-C-0001_SCI_N_20131223114501_20131223114501_0001_A.2A The elements in Example 1 are explained as follows:
"CE3-R" indicates the data of Chang'e 3 transmitted by the rover; a)|| tt||“BMGS\ indicates data received by Beijing Miyun Station; “PCAMR\ indicates panoramic camera (right camera); “SCI\ indicates scientific data;
“P\ indicates data that has been replayed in large capacity; GB/T33996—2017
“20131223114501 indicates that the time of the first data in the file is 11:45:01 on December 23, 2013; “20131223124510” indicates that the time of the last data in the file is 12:45:10 on December 23, 2013: “0001\ indicates the first data transmission task; “A” indicates version A;
“0A” indicates that the data level is 0A.
The elements in Example 2 are explained as follows:
"CE3" indicates the data from Di'e-3;
"BMYK\ indicates the data received by Beijing Miyun Station and Yunnan Kunming Station after being merged and deduplicated; "PCAML-C\ indicates the left camera of the panoramic camera, color mode; "SCI\ indicates scientific data;
"N\ indicates the data mixed after large-capacity playback and real-time download; "20131223114501" indicates that the start time of this detection cycle is 11:45:01 on December 23, 2013; "20131223124510\ indicates that the end time of this detection cycle is 12:45:10 on December 23, 2013; "0001\ indicates the first detection cycle; "A\ indicates version A;
"01\ indicates that the data level is 01.
The elements in Example 3 are explained as follows:
“CE3” represents the data from Di'e-3;
“BMYK\ represents the data received from Beijing Miyun Station and Yunnan Kunming Station after merging and deduplication; “PCAML-C-0001” represents the left camera of the panoramic camera, color mode, and the first image; “SCI\ represents scientific data;
“N\ represents the data mixed with large-capacity playback and real-time download; “20131223114501 represents the acquisition time of the image at 11:45:01 on December 23, 2013; “0001\ represents the first detection cycle; “A\ represents version A;
“2A” represents the data level is 2A.
GB/T33996—2017
GB/T7408—2005
GB/T14950—2009
GB/T17159—2009
References
Data elements and exchange formats
Information exchange
Photogrammetry and remote sensing terminology
Geodesy terminology
GB/T 30114.1—2013
Date and time representation
Terminology for space science and its applications
Part 1: Basic general
JPL D-7669, Planetary Data System Standards Reference Version 3.62A The elements in Example 1 are explained as follows:
“CE3-R” indicates the data of Chang’e-3 transmitted by the rover; a)
“BMGS\ indicates the data received by Beijing Miyun Station; “PCAMR\ indicates the panoramic camera (right camera); “SCI\ indicates scientific data;
“P\ indicates that the data is data after large-capacity playback; GB/T33996—2017
“20131223114501 indicates that the time of the first data in the file is 11:45:01 on December 23, 2013; “20131223124510” indicates that the time of the last data in the file is 12:45:10 on December 23, 2013: “0001\ indicates the first data transmission task; “A” indicates version A;
“0A” indicates that the data level is 0A.
The elements in Example 2 are explained as follows:
“CE3” indicates the data from Di'e-3;
“BMYK\ indicates the data received from Beijing Miyun Station and Yunnan Kunming Station after being merged and deduplicated; “PCAML-C\ indicates the left camera of the panoramic camera and the color mode; “SCI\ indicates scientific data;
“N\ indicates the data mixed with the data of large-capacity playback and real-time download; “20131223114501” indicates that the start time of the detection cycle is 11:45:01 on December 23, 2013; “20131223124510\ indicates that the end time of the detection cycle is 12:45:10 on December 23, 2013; “0001\ indicates the first detection cycle; “A\ indicates version A;
“01\ indicates that the data level is 01.
The elements in Example 3 are explained as follows:
“CE3” represents the data from Di'e-3;
“BMYK\ represents the data received from Beijing Miyun Station and Yunnan Kunming Station after merging and deduplication; “PCAML-C-0001” represents the left camera of the panoramic camera, color mode, and the first image; “SCI\ represents scientific data;
“N\ represents the data mixed with large-capacity playback and real-time download; “20131223114501 represents the acquisition time of the image at 11:45:01 on December 23, 2013; “0001\ represents the first detection cycle; “A\ represents version A;
“2A” represents the data level is 2A.
GB/T33996—2017
GB/T7408—2005
GB/T14950—2009
GB/T17159—2009
References
Data elements and exchange formats
Information exchange
Photogrammetry and remote sensing terminology
Geodesy terminology
GB/T 30114.1—2013
Date and time representation
Terminology for space science and its applications
Part 1: Basic general
JPL D-7669, Planetary Data System Standards Reference Version 3.62A The elements in Example 1 are explained as follows:
“CE3-R” indicates the data of Chang’e-3 transmitted by the rover; a)
“BMGS\ indicates the data received by Beijing Miyun Station; “PCAMR\ indicates the panoramic camera (right camera); “SCI\ indicates scientific data;
“P\ indicates that the data is data after large-capacity playback; GB/T33996—2017
“20131223114501 indicates that the time of the first data in the file is 11:45:01 on December 23, 2013; “20131223124510” indicates that the time of the last data in the file is 12:45:10 on December 23, 2013: “0001\ indicates the first data transmission task; “A” indicates version A;
“0A” indicates that the data level is 0A.
The elements in Example 2 are explained as follows:
“CE3” indicates the data from Di'e-3;
“BMYK\ indicates the data received from Beijing Miyun Station and Yunnan Kunming Station after being merged and deduplicated; “PCAML-C\ indicates the left camera of the panoramic camera and the color mode; “SCI\ indicates scientific data;
“N\ indicates the data mixed with the data of large-capacity playback and real-time download; “20131223114501” indicates that the start time of the detection cycle is 11:45:01 on December 23, 2013; “20131223124510\ indicates that the end time of the detection cycle is 12:45:10 on December 23, 2013; “0001\ indicates the first detection cycle; “A\ indicates version A;
“01\ indicates that the data level is 01.
The elements in Example 3 are explained as follows:
“CE3” represents the data from Di'e-3;
“BMYK\ represents the data received from Beijing Miyun Station and Yunnan Kunming Station after merging and deduplication; “PCAML-C-0001” represents the left camera of the panoramic camera, color mode, and the first image; “SCI\ represents scientific data;
“N\ represents the data mixed with large-capacity playback and real-time download; “20131223114501 represents the acquisition time of the image at 11:45:01 on December 23, 2013; “0001\ represents the first detection cycle; “A\ represents version A;
“2A” represents the data level is 2A.
GB/T33996—2017
GB/T7408—2005
GB/T14950—2009
GB/T17159—2009
References
Data elements and exchange formats
Information exchange
Photogrammetry and remote sensing terminology
Geodesy terminology
GB/T 30114.1—2013
Date and time representation
Terminology for space science and its applications
Part 1: Basic general
JPL D-7669, Planetary Data System Standards Reference Version 3.6
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