BIG CAT 600
Space Inventor ApS
ESPA Grande-class microsatellite platform (up to 600 kg) with full-plate payload adapter for heavy-duty missions.
Technical specifications
- Redundancy
- Dual-redundant avionics and AOCS
- Power options
- 28 V unregulated bus
- Platform mass (incl. basic propulsion)
- 230 kg
- Total spacecraft mass (incl. payload + propulsion)
- Max 600 kg
- Lifetime
- 7 years
- S-band RF uplink
- 2025-2110 MHz
- S-band RF downlink
- 2200-2290 MHz, up to 10 Mbps
- Attitude control system
- 3-Axis active determination and control
- GPS
- Position accuracy: 2.0 m
- Propulsion
- Chemical and electrical
- Security
- 256 bit encryption on uplink and downlink
- Space debris mitigation
- Compliant with applicable space debris mitigation requirements, including controlled or natural de-orbit within required post-mission lifetime
- Payload mass
- Up to 400 kg
- Payload envelope
- W:90 x L:101.5 x H:115 cm
- Payload power
- Up to 750 W orbital average power
- Standard payload interfaces
- CAN bus
- Payload data storage
- 4 GB SLC flash-based file system storage with EDAC
- Maximum read/write rate
- Up to 1 Gbps with Ethernet
- Optional X-band
- Frequency: 8.025 - 8.4 GHz
- Optional Ka-band
- Frequency: 7.8 - 20.2 GHz
- Optional solar panel configuration
- Single deployable
- Optional star trackers
- < 10 arcsec attitude knowledge
About
BIG CAT 600 is Space Inventor’s largest platform, designed as an ESPA Grande-class satellite bus with a full-plate payload adapter and built from flight-proven, in-house modules. It serves as a robust, highly customizable foundation for demanding missions in Earth observation, advanced communications or complex technology demonstrations.
The platform features standard, fully redundant, radiation-tolerant avionics designed for operations with a lifespan of 7 years across LEO, MEO and GEO, with advanced single-event effect mitigations per ECSS guidelines. Deployable solar panels and storage capacity of up to 1000 Whr deliver more than 500 W of continuous power for power-intensive applications.
3-axis active attitude control achieves pointing accuracy of 10 arcsec (1-sigma), supported by star trackers, fine sun sensors and gyroscopes, with multiple control modes including nadir pointing, inertial, ground spot tracking and scanning. A hybrid chemical and electric propulsion system ensures efficient orbit maintenance and maneuverability. Data flows through dedicated and standard payload interfaces including Ethernet, LVDS and SpaceWire, with a reliable S-band communication architecture and optional X- and Ka-band links.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.
