# ERNST

> imaging satellite built by the Fraunhofer Institute for High-Speed Dynamics

**Wikidata**: [Q129264078](https://www.wikidata.org/wiki/Q129264078)  
**Source**: https://4ort.xyz/entity/ernst

## Summary
ERNST (Experimental Spacecraft based on Nanosatellite Technology) is a German imaging satellite and CubeSat developed by the Fraunhofer Institute for High-Speed Dynamics. Weighing approximately 20 kilograms, this Earth observation satellite was launched for the Bundeswehr on August 16, 2024, aboard a SpaceX Falcon 9 rocket. It operates in a Sun-synchronous orbit to capture imagery of the Earth.

## Key Facts
- **Official Name:** Experimentelle Raumfahrtanwendung basierend auf Nanosatellitentechnologie (Experimental Spacecraft based on Nanosatellite Technology).
- **Launch Date:** August 16, 2024, at 18:56:00.
- **Operator:** Bundeswehr (German Armed Forces).
- **Manufacturer/Developer:** Fraunhofer Institute for High-Speed Dynamics.
- **Mass:** 20 kilograms.
- **Dimensions:** 236 mm (width) x 236 mm (length) x 340 mm (height).
- **Classification:** CubeSat / Earth observation satellite.
- **Orbit:** Sun-synchronous orbit.
- **Launch Vehicle:** Falcon 9 Block 5 (Booster B1075).
- **COSPAR ID:** 2024-149K.
- **Power:** Solar arrays with a nominal power of 60 Watts.

## FAQs
### Q: What does the acronym ERNST stand for?
A: ERNST stands for "Experimentelle Raumfahrtanwendung basierend auf Nanosatellitentechnologie," which translates to "Experimental Spacecraft based on Nanosatellite Technology."

### Q: Who built and operates the ERNST satellite?
A: The satellite was built and developed by the Fraunhofer Institute for High-Speed Dynamics in Germany, but it is operated by the Bundeswehr (the German Armed Forces).

### Q: When and how was ERNST launched?
A: ERNST launched on August 16, 2024, at 18:56:00 from the Vandenberg Space Launch Complex 4 East. It was a payload aboard a SpaceX Falcon 9 Block 5 rocket.

## Why It Matters
ERNST represents a significant advancement in the use of nanosatellites for military and governmental Earth observation. Traditionally, high-resolution imaging satellites were large, expensive, and required years of development. ERNST challenges this paradigm by utilizing the CubeSat standard—a miniaturized form factor made of 10cm-sided cubic modules—to deliver imaging capabilities at a fraction of the size and cost.

Developed by the Fraunhofer Institute for High-Speed Dynamics and operated by the Bundeswehr, the satellite serves as a demonstration of how compact, 20-kilogram spacecraft can be rapidly deployed to support defense and reconnaissance objectives. Its placement in a Sun-synchronous orbit ensures consistent lighting conditions for imaging, which is critical for high-quality Earth observation data. The successful launch aboard a SpaceX Falcon 9 further validates the accessibility of commercial rideshare programs for dedicated national security payloads. By integrating a 60-watt solar array into a small frame, ERNST pushes the boundaries of what is physically possible regarding power and instrumentation on a nanosatellite platform.

## Notable For
- **Military Reconnaissance:** It is a dedicated imaging satellite operated by the German Bundeswehr, distinct from purely academic or commercial CubeSats.
- **Compact Efficiency:** It integrates a 60-watt spacecraft solar array and imaging technology into a small 20 kg frame measuring approximately 23.6 cm x 23.6 cm x 34 cm.
- **Rapid Deployment:** The project demonstrates the transition from experimental research at the Fraunhofer Institute to an operational orbital asset.
- **Orbital Specificity:** It was inserted directly into a Sun-synchronous orbit, optimized for consistent Earth surface lighting.

## Body

### Development and Specifications
ERNST is an Earth observation satellite classified as a CubeSat, a type of miniaturized satellite built from standardized 10 cm modules. It was manufactured and developed by the **Fraunhofer Institute for High-Speed Dynamics** in Germany. The satellite has a total mass of **20 kilograms** and features a rectangular bus structure with physical dimensions of **236 mm in width, 236 mm in length, and 340 mm in height**.

The spacecraft is powered by a **spacecraft solar array** with a nominal power output of **60 Watts** (unit: Watt). Its design is optimized for agility and performance within the constraints of nanosatellite technology.

### Launch and Deployment
The satellite was successfully launched on **August 16, 2024**, at **18:56:00** UTC. The launch took place at **Vandenberg Space Launch Complex 4 East**. ERNST was a payload aboard a **Falcon 9 Block 5** launch vehicle (specifically utilizing booster B1075), managed by the launch contractor **SpaceX**. Following launch, ERNST was assigned the COSPAR ID **2024-149K** and the Satellite Catalog Number (SCN) **60477**.

### Mission Profile
ERNST operates as an artificial satellite specifically designed to observe Earth from orbit. It maintains a **Sun-synchronous orbit**, a near-polar orbit where the satellite passes over any given point of the planet's surface at the same local solar time. While developed by a civilian research institute (Fraunhofer), the satellite is distinctively operated by the **Bundeswehr**, indicating its primary role in defense and security applications.

## References

1. [Source](https://www.nanosats.eu/sat/ernst)
2. [Source](https://www.emi.fraunhofer.de/en/business-units/space/research/nanosatellite-space-technology.html)
3. [Source](https://www.emi.fraunhofer.de/en/business-units/space/research/space-qualification-of-the-ernst-nanosatellite.html)
4. [Source](https://publica-rest.fraunhofer.de/server/api/core/bitstreams/c8aeaa02-c09f-4939-aa04-8f4598167ddb/content)
5. Jonathan's Space Report
6. [Source](https://publica-rest.fraunhofer.de/server/api/core/bitstreams/4e4df654-2dd6-43b3-ac9c-c50611811a59/content)
7. [Source](https://www.tagesschau.de/wissen/technologie/nanosatellit-ernst-fraunhofer-institut-100.html)