Optical payload · Earth observation

ST-200

High-resolution 8U payload (excl. sensor & electronics) built around a 185 mm Ritchey-Chrétien-Cassegrain telescope. Its 45 MP multispectral sensor and active motion compensation deliver imagery with a GSD (Ground Sampling Distance) of 1.5 m across an 11.9 km swath – for the most demanding missions.

ST-200 optical payload – front view

At a glance

High-resolution Earth observation telescope in an 8U form factor – for LEO2VLEO missions from 300 to 500 km, multispectral, athermal and with active motion compensation.

1.5m GSDGround Sampling Distance · at 500 km altitude
11.9km Swath widthat 500 km altitude
5+ Spectral channels450 to 900 nm
45MP Sensor8192 × 5460 pixels
8U Dimensions220.3 × 220.3 × 313 mm · excl. sensor & electronics
4503g MassTelescope payload, 8U

Specifications

Full specification of the optical payload system.

Optical design Ritchey-Chrétien-Cassegrain
Aperture 185 mm
Focal length 1100 mm · F/5.9
Field of view (FOV) 1.4°
Spectral range 450 to 900 nm*
Spectral channels 5+
Sensor 45 MP (8192 × 5460)*

* Features and other options, such as SWIR or LWIR, on request.

Views

The ST-200 in detail – carbon tube with tangential spider, primary mirror mount and integration into the 8U structure.

The imaging principle

ST-200 · Earth observation

Imaging
im überflug.

Swath width
11.9 km
GSD
1.5 m
Altitude
500 km

Imaging along the ground track

Schematic illustration of the imaging principle.

Your mission

Set your orbital altitude — the ST-200 key figures update instantly.

GSD
1.5m

Ground Sampling Distance at nadir

Swath width
11.9km

fixed optics, no rotation

Spatial resolution
Blue1.6m450–520 nm Green1.8m520–600 nm Red2.2m630–690 nm Near infrared2.7m760–900 nm Panchromatic2.2m450–900 nm

Nadir estimate: pixel sampling (GSD) combined with the aperture’s diffraction limit (1.22 · λ / D, band centre)

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Approximate values for nadir viewing. Off-nadir operation, Earth curvature and atmosphere are not taken into account — binding figures are given in the datasheet.