Product Specifications

Below are the key specifications for Wyvern's imagery data products. For details on spectral, spatial, temporal, and geolocation accuracy, see the tables that follow.

Dragonette Spectral Bands Overview

420 nm

900 nm

Dragonette Constellation Specifications

Property	Dragonette-1	Extended VNIR (Dragonette-2/3/4)
Number Of Spectral Bands	23 Bands	31 Bands
Spectral Band Centre Wavelength Range (VNIR)	503 nm – 799 nm	445 nm – 870 nm
Spectral Sampling – Band Centre-to-Centre	7 nm – 21 nm	10 nm – 20 nm
Spectral Resolution – Bandwidth (FWHM)	20 nm – 32 nm	16 nm – 30 nm

Wyvern's spectral imagery data product specifications

Property	Dragonette-1/2/3/4
Ground Sample Distance (GSD)	5.3 m
Constellation Average Revisit Time At Equator	1.6 Days
Constellation Average Revisit Time At 20° Latitude	1.5 Days
Constellation Average Revisit Time At 40° Latitude	1.2 Days
Constellation Average Revisit Time At 60° Latitude	0.7 Days
Minimum Sun Elevation Angle (SEA)	+15° Above Horizon
Imageable Latitude Range	+82°N to -82°S
Imaging Sensor Bit Depth	10-Bit
Estimated Average Signal-to-Noise (SNR) At Nadir	60:1 (Wavelength Dependent)
Image Raster File Format	Cloud-Optimized GeoTIFF (COG)
Metadata Sidecar File Format	STAC Text (JSON)
Image Scene Swath Width At Nadir	20 km (Fixed)
Off-Nadir Angle (ONA) Range	0° – 20°
Standard Image Scene Size	400 km2

Wyvern's standard imagery data product specifications

Comparison of Processing Levels

Property	L1B	L2A
Image Raster Data Type	32-Bit Floating Point (float32)	16-Bit Unsigned Integer (uint16), scaled reflectance
Geolocation Accuracy Over Land (CE90)	25 m to 100 m (Dependent Upon Location)	25 m to 100 m (Dependent Upon Location)
Image Pixel Units	Top-of-Atmosphere Radiance (W / (m² * sr * µm))	Surface Reflectance (unitless, scaled)
Map Projection Coordinate System	Geographic WGS84 (EPSG 4326)	UTM / WGS84