Summary

The OHB Sweden InnoSat microsatellite platform is an integrated satellite platform intended for a wide range of LEO applications, such as Earth Observation, telecom, and scientific research, in the 40-200kg satellite mass range. It is designed to provide high performance in pointing, power, and data downlink, a low cost-to-reliability ratio. The platform is designed to interface with multiple types of payloads and can be tailored to satisfy customer requirements.

The InnoSat platform options a number options for customers, including:

  • High pointing: APE < 10" (2σ), AKE < 5" (2σ) (any axis)
  • High slew rate: < 25 deg/min
  • High power: Expandable up to 120W EOL OA
  • Comm: ISL, L-band
  • Secure comm: Authentication/encryption (AES)

All InnoSat platforms are designed and built around a set of re-usable core elements (both hardware and software). Three variants of the InnoSat platform are offered by OHB Sweden:

  • Small: a simple, body-mounted solar array and a full hemispherical payload view for a wide variety of orbits
  • Medium: body-mounted solar array, optimized for dawn-dusk Sun Synchronous Orbits (SSOs) and nadir-pointing payloads
  • Large: suitable for all SSOs with deployable solar array, expandable in power and size

The InnoSat Small platform has flight heritage through the GMS-T mission, which has been in orbit since 2021. The InnoSat Medium platform is scheduled for launch in 2021 through the MATS ("Mesospheric Airglow/Aerosol Tomography and Spectroscopy") mission. The InnoSat Large platform is slated for launch in 2024 through the AWS ("Arctic Weather Satellite") mission.

The InnoSat platform has been designed based on a core philosophy characterized by the following:

  • Low-cost, NewSpace
  • In-house responsibility for all sub-systems
  • Selective redundancy
  • Unobstructed payload accommodation volume, providing maximal operational envelope
  • Envelope optimized for piggyback launches
  • Fault Tolerant COTS approach
  • Radiation tolerant avionics
  • Fully qualified and flight proven equipment
  • CCSDS compliant communications
  • ITAR free

OHB Sweden has a range of facilities close to Stockholm Arlanda Airport, for use during the full lifecycle of InnoSat, from design to operations, including:

  • Large ISO8 cleanroom (upgradeable to ISO5), suitable for small constellations
  • 3.5m3 TVAC (in collaboration with KTH)
  • Mission Control Center (MCC)

The baseline for all InnoSat platforms is re-use of OHB Sweden's RAMSES control system, which is used during the development and testing phases of the spacecraft, and real mission operations. This enables efficient transition between AIT and operations. The system architecture is designed for multi-satellite missions and is scalable. OHB Swedens' operation center is located in Kista Sweden. RAMSES is ECSS PUS based.

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Last updated: 2022-09-20

InnoSat SML microsatellite platform

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Specs

wet mass
small: < 40 kg
medium: 40-70 kg
large: 70-200 kg
power supply (eol oa)
small/medium: 30-40 W
large: 50-60 W
power supply
28V unregulated
data rate
x-band: < 200 Mbps (downlink)
s-band: < 4 Mbps (downlink)
write: < 200 Mbps
data interface
CAN
RS422/485
SpaceWire
PPS
data storage
56 to 128 GB
design lifetime
5 yr
delivery time
12 to 24 mo

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