AERONET fields¶

AeronetExtension exposes the following fields in Item properties. All six are required by the extension schema. Field meanings follow the extension specification.

STAC field	Python property	Python type	Meaning
aeronet:site_name	site_name	str	Station name.
aeronet:land_use_type	land_use_type	str	Station land use.
aeronet:L10	L10	int	Days with Level 1.0 data.
aeronet:L15	L15	int	Days with Level 1.5 data.
aeronet:L20	L20	int	Days with Level 2.0 data.
aeronet:moon_L15	moon_L15	int	Days with lunar Level 1.5 data.

Names are case-sensitive: use L10, L15, L20, and moon_L15 exactly as shown.

Data levels¶

For Version 3 solar aerosol optical depth, NASA defines Level 1.0 as unscreened, Level 1.5 as cloud-screened and quality-controlled, and Level 2.0 as quality-assured. See the NASA AERONET overview. These fields hold day counts, not optical-depth measurements or level identifiers.

The Python wrapper exposes only the lunar field listed above, even though NASA offers other lunar products.

Storage and constraints¶

Getters read the underlying Item properties and raise pystac.RequiredPropertyMissing for absent or null values. Setters store their input without coercion or runtime type checking. Zero counts are retained. apply() overwrites all six fields and preserves unrelated Item properties.

The schema declares strings and integers, with int32 formats on the four counts. It defines no land-use enumeration, string length limit, or numeric minimum/maximum. It also rejects unrecognized aeronet: fields. The wrapper does not enforce these schema rules; callers must validate before relying on conformance. It does not check relationships between counts or their reporting interval.