# SSTL-300 bus
*bus . products*

SSTL medium-class satellite platform family used for NovaSAR-1.

## Specifications
- **product status**: operational
- **deployment context**: orbital
- **manufacturer**: surrey-satellite-technology
- **bus**: {"form_factor":"medium-class LEO satellite bus","platform_class":"mini"}
- **entity type**: bus
- **last verified date**: 2026-06-26
- **verified by**: operator
- **claim status**: claimed
- **provider**: surrey-satellite-technology
- **attributes**: {"kind":"bus","product_status":"operational","deployment_context":"orbital","manufacturer":"surrey-satellite-technology","description":"SSTL medium-class satellite platform family used for NovaSAR-1.","bus":"{\"form_factor\":\"medium-class LEO satellite bus\",\"platform_class\":\"mini\"}"}
- **relevance**: in-scope

## Editorial
SSTL-300 is the medium-class SSTL satellite bus represented by NovaSAR-1. NovaSAR-1 is a 450 kg SAR Earth-observation mission, and the SSTL-MINI platform datasheet lists NovaSAR as an example SSTL-MINI configuration.[^sstl-novasar-1][^sstl-mini-datasheet] The bus is mini-class by the 450 kg spacecraft mass. SSTL-MINI family figures include payload mass up to 200 kg and payload peak power up to 2000 W as family-level limits, not fixed allocations for every SSTL-300 instance.[^sstl-mini-datasheet]

## Compositional position
- novasar-1 (missions) --[mission_buses]--> SSTL-300 bus
- nigeriasat-2 (missions) --[mission_buses]--> SSTL-300 bus

## Sources
- [sstl-novasar-1] | NovaSAR-1: Launched 2018, SSTL | https://www.sstl.co.uk/space-portfolio/launched-missions/2010-2019/novasar-1-launched-2018 | tier=operator-engineering | accessed=2026-06-26 | author=Surrey Satellite Technology Ltd
- [sstl-mini-datasheet] | SSTL-MINI datasheet | https://www.sstl.co.uk/getmedia/94ebb49a-b135-40f4-b2be-4670de7e54a7/SSTL-MINI.pdf | tier=operator-datasheet | accessed=2026-06-26 | author=Surrey Satellite Technology Ltd
- [eoportal-novasar] | NovaSAR-S, ESA eoPortal mission directory | https://earth.esa.int/eogateway/missions/novasar-s | tier=community | accessed=2026-06-26
  Lower-tier cross-check for SSTL-300 bus naming.

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Source: https://eo-atlas.org/products/bus/sstl-300
Maintainer: SpectraWorks B.V. (CC-BY 4.0)