FileMetadata

Domain entity representing metadata associated with a LASCO FITS file.

backend.database.domain.file_metadata.FileMetadata dataclass

Domain entity representing a file metadata

Each instance models a metadata of a single file. Metadata contains file name, datetime of observation, instrument used for observation, exposure time, pixel numbers in width and height, roll angle

Invariants

• datetime fields must be timezone-aware UTC datetimes
• instrument must be Instrument enum
• exposure_time must be positive
• width and height must be positive integers

Attributes:

Name	Type	Description
raw_file_name	str	raw file name as present in the data
raw_file_hash	Optional[str]	calculated file hash value, will be null initially
datetime_of_observation	datetime	date and time of observation
last_modified_utc		date time when the file became available
instrument	Instrument	instrument used for observation
exposure_time	float	exposure time for taking the image
width	int	number of pixels
height	int	number of pixels
roll	float	roll angle of camera while taking the observation