GB/T 34514-2017 in English

1. Background and significance of the standard

GB/T 34514-2017 "Requirements for distribution and user services of remote sensing data from land observation satellites" is an important national standard drafted on the basis of GB/T1.1-2009 rules and is managed by the National Technical Committee for Standardization of Aerospace Technology and Its Applications. This standard aims to standardize the distribution and user service process of remote sensing data from land observation satellites to ensure the accuracy and efficient use of data.

2. Comparison of standard frameworks

3. Interpretation of the core content of the standard

3.1 Data distribution requirements

According to the standard, remote sensing data products are divided into levels L0 to L6 according to the processing level. Among them:

• Level L0 is raw data and needs to be deformatted.
• Levels L1-L2 are basic application data, supporting radiation correction and geometric correction.
• Levels L3-L6 are value-added products and need to be integrated with control points and elevation models.

3.2 Data distribution format and naming rules

Remote sensing data distribution format requirements:

• Image data: support GeoTIFF, JPEG2000 and BigTIFF formats.
• Metadata file: in XML format.
• Thumbnail: Use JPEG format.

3.3 Data distribution methods

It is divided into online distribution and offline distribution:

• Online distribution:Includes dedicated line push and network distribution, supporting real-time data transmission.
• Offline distribution:Data delivery through mobile storage media, suitable for large-capacity data needs.

4. Technical services and implementation suggestions

4.1 Emergency data service process

In natural disasters or emergencies, the emergency data service process is as follows:

1. Obtain emergency demand information and initiate response mechanisms.
2. Dispatch satellites for mission planning and command injection.
3. Provide emergency archive data products and process and generate emergency data.
4. Terminate the service according to the development of the incident.

4.2 User Management and Technical Support

User Registration Process:

• Individual Users:You need to provide your name, ID, contact information, etc.
• Institutional Users:You need to provide your institution name, legal representative, and organization code, etc.

4.3 Security and Confidentiality Requirements

Data distribution and user services must strictly comply with relevant national security management measures to ensure the security of data during transmission and storage.