SPRITE

SPRITE is an innovative project defining a constellation of 3U CubeSats designed to enhance Internet of Things (IoT) connectivity. These small satellites aim to support the provisioning of Global Navigation Satellite System (GNSS) Real-Time-Kinematic (RTK) corrections to ground-based sensors. This capability enables remote monitoring of infrastructure and vehicles, providing near-continuous, high-precision GNSS position fixes. As a unique and novel concept, SPRITE promises millimetre-level accuracy in GNSS corrections, a significant improvement over current solutions. By focusing on specific geographies, such as the UK, SPRITE can deliver near-real-time GNSS corrections, setting it apart from competitors like Galileo's High Accuracy Service (HAS) and other Precise Point Positioning (PPP) services.

The primary objective of SPRITE is to establish a constellation of 3U CubeSats that augment existing GNSS constellations, broadcasting RTK corrections over the UK. The project includes the development of an initial "FlatSat" prototype as a proof of concept. This Proof of Concept (PoC) will reach Technology Readiness Level 3 (TRL 3), demonstrating the critical functions but not yet space-qualified. To progress to a higher TRL and create a space-qualified prototype, additional funding and extended development time will be required.

SPRITE's project framework is built around four main sub-objectives. First, it aims to define a small satellite constellation that provides a Regional RTK network with targeted coverage for the UK. Second, it seeks to integrate satellite communication with an existing structural monitoring system developed by GVL. Third, the project will utilise Commercial Off-The-Shelf (COTS) components to minimise costs and maximise flexibility. Lastly, SPRITE will define the payload necessary to enable robust communication capabilities. This comprehensive approach ensures that SPRITE not only meets but exceeds current GNSS correction standards, offering superior coverage, accuracy, and cost-effectiveness.