# ESSA-2

> former American weather satellite

**Wikidata**: [Q16325197](https://www.wikidata.org/wiki/Q16325197)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ESSA-2)  
**Source**: https://4ort.xyz/entity/essa-2

## Summary
ESSA-2 was a former American weather satellite launched in 1966 as part of the TIROS Operational System. It was designed to monitor weather and climate from a Sun-synchronous orbit. The satellite operated for approximately four years before being decommissioned in 1970.

## Key Facts
- Launched on February 28, 1966, at 13:58:00 UTC from Cape Canaveral Space Launch Complex 17B
- Operated by the Environmental Science Services Administration (ESSA)
- Mass: 286 kilograms; dimensions: 56 cm height × 107 cm diameter
- Powered by solar arrays and a 21-cell nickel-cadmium battery
- Launched aboard a Delta E rocket (Thor 461/D-037 configuration)
- Part of the TIROS Operational System, following ESSA-1 and preceding ESSA-3
- Retired from service on October 16, 1970, after entering hibernation on March 20, 1970

## FAQs
### Q: What was ESSA-2's primary mission?
A: ESSA-2 was designed to monitor Earth's weather and climate patterns from space as part of America's operational weather satellite program.

### Q: How long did ESSA-2 operate in space?
A: ESSA-2 operated for approximately four years, from its launch in February 1966 until its retirement in October 1970.

### Q: Who operated ESSA-2?
A: The Environmental Science Services Administration (ESSA) operated ESSA-2 as part of their weather satellite program.

## Why It Matters
ESSA-2 represented a critical advancement in operational meteorology, providing continuous weather monitoring capabilities that transformed how meteorologists tracked storms, hurricanes, and climate patterns. As part of the TIROS Operational System, it helped establish the foundation for modern weather forecasting by delivering reliable, real-time satellite imagery to weather services. The satellite's four-year operational lifespan demonstrated the viability of long-term weather monitoring from space, paving the way for today's sophisticated weather satellite networks. ESSA-2's contributions to hurricane tracking and climate observation were particularly significant, as it provided data that helped improve early warning systems and our understanding of atmospheric phenomena.

## Notable For
- First operational weather satellite in the ESSA series following the experimental TIROS program
- Provided continuous weather monitoring for four years, establishing reliability benchmarks
- Captured critical hurricane data, including imagery of Hurricane Faith in 1966
- Demonstrated the effectiveness of Sun-synchronous orbits for consistent Earth observation
- Part of the transition from experimental to operational weather satellite systems

## Body
### Technical Specifications
ESSA-2 was a cylindrical satellite measuring 56 cm in height and 107 cm in diameter, with a total mass of 286 kilograms. The satellite featured a solar array power system complemented by a nickel-cadmium battery with 21 cells, providing reliable power for its instruments and communication systems.

### Launch and Orbit
The satellite launched on February 28, 1966, at 13:58:00 UTC aboard a Delta E rocket from Cape Canaveral Space Launch Complex 17B. It entered a Sun-synchronous orbit, which allowed for consistent lighting conditions during each pass over Earth's surface, crucial for comparative weather analysis.

### Operational History
ESSA-2 began operations immediately after launch and provided continuous weather monitoring services. The satellite entered a hibernation mode on March 20, 1970, likely due to declining power or system degradation, before being officially retired from service on October 16, 1970.

### System Integration
As part of the TIROS Operational System, ESSA-2 worked alongside other satellites in the series to provide comprehensive Earth coverage. The satellite was manufactured by RCA Corporation and operated under the Environmental Science Services Administration, representing a successful public-private partnership in space technology.

### Legacy
ESSA-2's successful operation helped validate the concept of dedicated weather satellites, leading to increasingly sophisticated systems. Its data contributed to improved hurricane tracking and weather prediction capabilities during its operational lifetime.

## Schema Markup
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## References

1. [Source](https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1966-016A)
2. [Source](https://space.skyrocket.de/doc_sdat/essa.htm)
3. Jonathan's Space Report