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OrbAstro is making available the world’s most capable 3U satellite platform, at a price-point that is simply unmatched.


(+£95,000 for launch)

Included in this price: the platform, engineering support with payload integration, flight-acceptance testing of the fully integrated satellite, and storage before shipment to the launch provider. Launch can be managed by OrbAstro and provided through a 3rd-party partner; price displayed is indicative of standard LEO/SSO orbit.

This product-line has been made possible through contracts with:


The volumetric efficiency of the ORB family of satellite platforms has been enabled by the team compressing what is typically seven 1U-scale PCBs into a single 85x80mm board. This “satellite on a board” contains: the OBC, reaction wheel controls, magnetorquer controls, camera interfaces, star-tracker interfaces, all sensor interfaces, full SDR S-/X-band, GPS, optical data processing and control, and EPS.

    • The platform utilises an OrbAstro Telos-10 OBC.
    • The OBC is based on Xilinx Ultrascale+ MPSoCs with ARM cortex A53 and R5 64-bit processing cores, 2GB LPDDR4, 64GB eMMC, 250GFLOP double precision FPU, software and hardware based mitigation for SEU and SEL.
    • For exceptional data processing requirements, the onboard computer can be upgraded to an OrbAstro Telos-40 OBC for an additional £5,000 or Telos-45 for an additional £20,000. This gives two cores for payload operations on which customers can have their own software either Bare Metal or Linux. No further payload volume in consumed with this change, however power available for the payload will be reduced depending on how heavily this OBC is utilised.

    • The platform hosts an optical communications system for data relay through the Guardian Network. Subscription packages vary, but 500MB/day uplink/downlink with up to 24 links per day is the baseline. Service available from mid-2023.
    • As a back-up, and until the Guardian Network becomes operational, the platform contains an S-band transceiver and antenna with a 50Mb/s typical data rate at 1,000km. All Guardian Network ground stations are capable of supporting S-band, X-band, and Ka-band links. Three associated ground stations will be operational by late 2021.
    • The S-band transceiver can be complimented with a Ka-band transmitter and antenna for an additional £5,000. The transmitter typically provides an additional 200Mb/s downlink at 1,000km range. But power available to the payload is reduced depending on utilisation, and 0.15U payload volume is consumed. All Guardian Network ground stations are capable of supporting S-band, X-band, and Ka-band. Three associated ground stations will be operational by late 2021.

    • The ADCS is based on an array of reaction wheels, magnetorquers, dual star-tracker cameras, Earth and Sun cameras, magnetometers, gyroscopes, and GPS unit, with a relatively comprehensive level of redundancy built in.
    • It provides highly accurate pointing control authority (<0.1deg/s) and pointing knowledge (<0.01deg/s) in both Solar and Eclipse phases.
    • High precision dual star-tracker for redundancy.
    • Dual redundant 3-axis magnetorquers.
    • It provides extremely high torque authority (40mNm) and momentum storage capacity (38mNms), typically an order of magnitude higher than what is conventionally available for 3U satellites. This ability for agile steering/pointing enables the customer to increase the amount of useful data collected by their payload (i.e. by jumping between points of interest through the orbit rather than say maintaining a fixed NADIR-pointing angle). The overhead for this type of target-tracking operation is much compressed when coupled to the Guardian Network autonomous mission operations service.

    • An electric propulsion system is contained within the “tuna can” of the platform. It provides a maximum thrust of 116μN and a delta-V of 0.46km/s (baselining a 5kg spacecraft).
    • The unit enables accelerated deployment, accelerated RAAN drift, formation maintenance, station-keeping, collision avoidance, and active deorbit capabilities.
    • The design is highly robust and reliable with independent thruster heads, multiple neutralisers, redundancy built into the integrated electronics, no pressurised tanks, and no moving parts.

    • The platform will utilise a 36Wh variant of the OrbAstro EPS technology.
      Utilisation of conventional lithium-ion chemistries for batteries are one of the primary causes of early decommissioning of nanosatellites, due to cycle lifetime and vulnerability to the thermal environment.
    • OrbAstro uses an alternative cell chemistry far better suited to the LEO environment and satellite mission requirements.
    • The battery can operate at an 85% depth of discharge over a period of 30,000 cycles at 2C.
    • Maximum power consumption 160W.
    • The battery is extremely robust to the thermal environment, with an operating temperature range of -20 0 C to +60 0 C with minimal impact on capacity and lifetime.
    • An optional upgrade to increase power capacity of the battery to 72Wh is available for an additional £5,000, reducing payload volume available by 0.38U. This is achieved by adding an additional 36Wh battery.

    • As a baseline, platform mounted solar panels are provided on 3 long faces of the chassis, generating 5.5W orbital average, of which 3.5Wh average is available for payload operations, depending on mission requirements.
    • An optional upgrade to increase power available to the payload from 3.5Wh orbital average to 20Wh is available for an additional £10,000. This is achieved with the addition of a deployable solar array (i.e. 3 additional long-faces worth of solar panels). No payload volume is consumed with this addition.

Place a Deposit

    Telos-40 OBCTelos-45 OBC72Wh EPSDeployable Solar PanelsKa-band upgrade

    If you have any questions, send them in an email to:


    OrbAstro has built every subsystem on this platform from the ground up, thus the supply chain and associated margins-upon-margins are significantly compressed. A lean batch-production philosophy has also been adopted. We do not provide customers with a custom-built turn-key solution that involves months of negotiations over requirements and shopping around with suppliers. What we offer is a single platform that is overkill in most cases but addresses 95%+ of the nanosatellite market.

    Rather than building subsystems as independent blocks that are then haphazardly bolted together, OrbAstro has built everything as an integrated system from the ground up, allowing for huge savings in volume consumed.

    The first ORB-3 satellite platform with a commercial payload onboard is launching in June 2021 on a SpaceX Falcon 9. It will have all subsystems listed including deployable solar panels, both Telos-10 and Telos-40, the S-band, and the Ka-band transceivers and antennas. OrbAstro currently has subsequent 6U platforms (ORB-6) booked for launch in late-2021 and mid-2022. The OrbAstro team has a long history of developing complex satellite subsystems, from concept to orbital operations.

    Sequence: LLS HLS, LLS, RV, LLS, TVAC, LLS with functional checks at every step.

    If the failure is on the platform side, either the defunct subsystem or the entire platform will be swapped out for a back-up free of charge (along with payload integration, and another round of flight-acceptance testing). If the failure is on the payload side, you will either need to make a quick fix on-site or take your payload home and come back with a suitably modified system when ready. In either case you will be charged an additional £10,000 to repeat the payload integration and flight-acceptance activities.

    Yes. If you do not, there is a high likelihood that there will be numerous bugs that will take weeks to resolve when it comes to payload integration to the actual satellite platform. It works out more cost-effective for both us and you, to do all of that on the flat-sat before you come on-site.

    No. You will get those subsystems anyway. In exceptional circumstances, it will be possible to remove some components if it is critical for the operations of your payload (e.g. removal of solar cells for line-of-sight or deployable structures). This minimises non-recurring expenses for us associated with handling, assembly, testing, and paperwork. Also, most subsystems onboard are required for connectivity with the Guardian Network, which will be a mandatory part of the package when it comes online.

    No. Only once the Guardian Network comes online in mid-2023. There will be a partially operational network available in 2022 that we will make available for beta-testing.

    We have three Guardian Network ground stations coming online over the period of 2021. You will be able to access your satellite through these ground stations through either S-/X-/Ka-band, before the Guardian Network provides you with persistent access. We will assist with associated spectrum filings.

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