# Echo 1

> NASA passive communications satellite

**Wikidata**: [Q4533325](https://www.wikidata.org/wiki/Q4533325)  
**Source**: https://4ort.xyz/entity/echo-1

## Summary
Echo 1 was NASA's first passive communications satellite, launched on August 12, 1960, as part of the Project Echo experiment. It was a 30-meter-diameter aluminum-coated mylar balloon satellite designed to reflect radio signals for long-distance communication.

## Key Facts
- Launched on **August 12, 1960**, at 09:39:43 UTC from Cape Canaveral Space Launch Complex 17A.
- Part of the **Project Echo** program, the first passive communications satellite experiment.
- Mass: **76 kilograms**.
- COSPAR ID: **1960-009A**.
- Launched by a **Thor-Delta rocket** (serial number 270/D002).
- Deorbited on **May 24, 1968**, after atmospheric entry.
- Also known as **NASA A-11**.
- Harvard designation: **1960 Iota I**.
- Wikipedia available in **7 languages** (German, Hungarian, Italian, Dutch, Polish, Russian, Ukrainian).

## FAQs
### Q: What was Echo 1 used for?
A: Echo 1 was a passive communications satellite designed to reflect radio signals, enabling long-distance communication experiments. It was part of NASA's Project Echo, demonstrating the feasibility of satellite-based communication.

### Q: How long did Echo 1 stay in orbit?
A: Echo 1 remained in orbit until **May 24, 1968**, when it experienced atmospheric entry and deorbited.

### Q: What was unique about Echo 1's design?
A: Echo 1 was a **30-meter-diameter aluminum-coated mylar balloon**, making it the first passive communications satellite. It relied on signal reflection rather than active electronics.

### Q: Who launched Echo 1?
A: Echo 1 was launched by NASA using a **Thor-Delta rocket** on **August 12, 1960**.

### Q: What was the significance of Project Echo?
A: Project Echo was NASA's first major satellite communications experiment, proving the concept of passive satellite communication before the deployment of active satellites like Telstar.

## Why It Matters
Echo 1 was a groundbreaking achievement in early space communication technology. As the first passive communications satellite, it demonstrated the feasibility of using a large reflective surface in space to relay radio signals. This experiment laid the foundation for future satellite communication systems, paving the way for more advanced satellites like Telstar. Echo 1's success proved that satellites could be used for long-distance communication, revolutionizing global telecommunications. Its design and mission were crucial in advancing space-based communication technology, influencing later developments in satellite and space exploration.

## Notable For
- First **passive communications satellite**, reflecting signals rather than amplifying them.
- Part of NASA's **Project Echo**, a pioneering experiment in satellite communication.
- Launched by a **Thor-Delta rocket**, marking an early use of this launch system.
- Had a **30-meter-diameter mylar balloon** for signal reflection.
- Deorbited in **1968**, ending its operational life after nearly eight years in space.

## Body
### Overview
Echo 1 was a **30-meter-diameter aluminum-coated mylar balloon** satellite, launched on **August 12, 1960**, as part of NASA's **Project Echo**. It was the first passive communications satellite, designed to reflect radio signals for long-distance communication experiments.

### Launch and Mission
- **Launch Date:** August 12, 1960, at 09:39:43 UTC.
- **Launch Site:** Cape Canaveral Space Launch Complex 17A.
- **Launch Vehicle:** Thor-Delta rocket (serial number 270/D002).
- **Mass:** 76 kilograms.
- **COSPAR ID:** 1960-009A.
- **Harvard Designation:** 1960 Iota I.

### Design and Functionality
- **Passive Satellite:** Echo 1 relied on signal reflection rather than active electronics.
- **Material:** Aluminum-coated mylar balloon, 30 meters in diameter.
- **Communication Method:** Reflected radio signals for long-distance communication.

### Deorbit and Legacy
- **Deorbit Date:** May 24, 1968, after atmospheric entry.
- **Significance:** Paved the way for future satellite communication systems, influencing designs like Telstar.
- **Project Echo:** First major NASA experiment in satellite communication, proving the concept of passive satellite relay.

### Additional Details
- **Aliases:** NASA A-11, Echo 1.
- **Wikipedia Availability:** Available in German, Hungarian, Italian, Dutch, Polish, Russian, and Ukrainian.
- **Commons Category:** Echo satellites.

## References

1. Jonathan's Space Report
2. [Source](https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1960-009A)