What Are Small Satellites? Uses & Key Manufacturers
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Small satellites (often referred to as “smallsats”) represent a massive shift in how humanity operates in space. Historically, satellites were the size of school buses�massive, incredibly expensive, custom-built machines that took a decade to build and were placed in high Geostationary Orbit (GEO).
Smallsats, by contrast, are miniaturized spacecraft. They leverage advances in commercial electronics (similar to how smartphones shrank computers) to pack powerful communication and observation capabilities into small box size package.
Characteristics of Small Satellites
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Low Earth Orbit (LEO) Deployment: Unlike legacy satellites, smallsats are primarily deployed in LEO. Being closer to Earth means lower latency (faster data transmission) and the ability to take higher-resolution images.
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Scalable Constellations: This is the most crucial concept. One smallsat isn’t very useful on its own because it orbits the Earth so fast. Therefore, they are launched in “constellations”�networks of tens, hundreds, or thousands of interconnected satellites working together to blanket the globe.
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Rapid Deployment & Cost-Effectiveness: Because they are smaller, lighter, and mass-produced, they are much cheaper to build. Furthermore, a single rocket launch can deploy dozens of smallsats at once, making access to space far more economical.
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High Revisit Rates: Because there are so many of them in a constellation, a smallsat network can pass over (revisit) the exact same spot on Earth multiple times a day, providing near real-time data and imagery.
Key Manufacturers and Market Leaders
They can generally be divided into two main categories based on their missions as follows.
Global Connectivity & Broadband Networks
| Company | Description |
|---|---|
| SpaceX (Starlink) | The current industry giant. SpaceX manufactures and launches the Starlink constellation, which currently consists of thousands of smallsats providing commercial internet access worldwide. |
| Amazon Kuiper | Amazon’s initiative to build a massive LEO satellite constellation. While currently in the deployment phase, Kuiper is designed to be a direct competitor to Starlink, providing global broadband. |
| OneWeb Satellites | One of the early pioneers in the modern LEO broadband race, OneWeb operates a constellation of several hundred small satellites aimed at providing enterprise-grade and government internet connectivity. |
Earth Observation & Data Intelligence
| Company | Description |
|---|---|
| Planet Labs Inc. | Famous for operating the largest constellation of Earth-imaging satellites in history. Their “Dove” smallsats image the entire landmass of the Earth every single day, providing vital data for agriculture, forestry, and defense. |
| Spire Global | Instead of taking traditional photos, Spire�s smallsats specialize in radio frequency (RF) data. They track global shipping (AIS), aviation tracking (ADS-B), and collect highly accurate weather data. |
| Capella Space | Specializes in Synthetic Aperture Radar (SAR). Unlike optical cameras, Capella’s smallsats can see through clouds and operate at night, providing high-resolution radar imagery regardless of weather conditions. |
| Satellogic | A company focused on building a scalable Earth observation platform that provides highly accessible, sub-meter resolution imagery to aid in global decision-making. |
| Chang Guang Satellite Technology Co., Ltd. | A major Chinese commercial aerospace company responsible for the Jilin-1 constellation, which focuses on providing high-resolution remote sensing imagery for commercial and government use. |
Summary
Small satellites are transforming the space industry by providing cost effective, flexible solutions for Earth observation, communications, scientific research, IoT and defense applications. Leading small satellite manufacturers continue to advance compact designs, payload capabilities, propulsion and onboard technologies, making SmallSats increasingly important for future space missions.