GB/T 33991-2017 in English
VALIDData dictionary for lunar information essentials
- Issued on:2017-07-12
- Implemented on:2018-02-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
| Standard No: | GB/T 33991-2017 |
| Document status: | VALID |
| Title in English: | Data dictionary for lunar information essentials |
| Title in Chinese: | 月球信息要素数据字典 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2017-07-12 |
| Implemented on: | 2018-02-01 |
| ICS Classification: | 07.040-Astronomy. Geodesy. Geography |
| Chinese Classification: | A46-Astronomy |
| Professional Classification: | GB-National Standard |
| Related Keywords: | lunar information elements
lunar morphology information lunar exploration data lunar information essentials introduction standard background lunar exploration project |
| Related Topics: | ims global data
Elements English Data Dictionary super moon Data Dictionary GBT33991 GB/T 33991-2017 Data Standards Dictionary data dictionary international |
《GB/T 33991-2017月球信息要素数据字典》由TC312（全国空间科学及其应用标准化技术委员会）归口，主管部门为中国科学院。
Introduction
Standard Background and Significance
With the continuous advancement of my country's lunar exploration project, the standardization of lunar exploration data has become an important demand in the field of space science. GB/T 33991-2017, as the first national standard to systematically regulate lunar information elements, has established a three-layer data dictionary framework including core elements such as lunar topography and rock composition.
Analysis of the framework structure
| Level | Component elements | Example | Occurrence times |
|---|---|---|---|
| Information subset | Logically associated entity set | Lunar morphology information subset | 4 categories |
| Information entity | Combination of elements with the same features | LUNAR_FEATURE_NAME | N |
| Information element | Minimum data unit | DIAMETER | 1 |
Core content detailed explanation
5.3 Basic parameters of the moon
Define 21 basic physical parameters, including:
- Mass: 7.353×10²²kg (error ±0.001)
- Average radius: 1737.4km
- Orbital eccentricity: 0.0549
5.4 Environmental information subset
Taking the Lunar surface temperature entity as an example, it contains 6 attributes:
- Temperature value (K)
- Measurement area (character type)
- Latitude and longitude coordinates (numeric type)
Implementation suggestions
Data Collection Specifications
It is recommended to use the code system in Appendix B of the standard:
| Terrain type | Foreign name | Code |
|---|---|---|
| Lunar Sea | Mare | ME |
| Lunar Creek | Rima | RI |
System Development Points
Pay special attention:
- Mandatory verification of required attributes (M)
- Longitude and latitude value range (latitude [-90,90], longitude [-180,180])
- Date format (YYYYMMDD)
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