# Tselina-O

> model of Soviet signals intelligence satellite

**Wikidata**: [Q14701644](https://www.wikidata.org/wiki/Q14701644)  
**Source**: https://4ort.xyz/entity/tselina-o

## Summary
Tselina-O is a model of Soviet signals intelligence satellite designed for electronic intelligence gathering. It was part of the broader Tselina family of satellites and played a key role in the Soviet Union's military reconnaissance capabilities during the Cold War.

## Key Facts
- **Type**: Signals intelligence (SIGINT) satellite
- **First Flight**: January 19, 1968
- **Manufacturer**: Pivdenne Design Office (primary), with payload contributions from TsNIRTI
- **Country of Origin**: Soviet Union
- **GRAU Index**: 11Ф616
- **Aliases**: Zelina-O, 11Ф616
- **Parent Program**: Tselina (family of Soviet/Russian SIGINT satellites)
- **Related Models**: Tselina-OK, Tselina-OM

## FAQs
### Q: What was the purpose of Tselina-O?
A: Tselina-O was a signals intelligence satellite designed to intercept and analyze electronic communications, radar signals, and other electromagnetic emissions for military reconnaissance purposes.

### Q: When was Tselina-O first launched?
A: The first Tselina-O satellite was launched on January 19, 1968.

### Q: Who manufactured Tselina-O?
A: The primary manufacturer was the Pivdenne Design Office, with the payload developed by TsNIRTI, a Soviet/Russian research institute.

### Q: What is the GRAU index for Tselina-O?
A: The GRAU index for Tselina-O is 11Ф616.

### Q: How does Tselina-O relate to other Tselina models?
A: Tselina-O is part of the Tselina family, which also includes the Tselina-OK and Tselina-OM models, all designed for signals intelligence.

## Why It Matters
Tselina-O was a critical component of the Soviet Union's military intelligence infrastructure during the Cold War. As a signals intelligence satellite, it enabled the interception and analysis of electronic communications, providing strategic advantages in surveillance and reconnaissance. Its development and deployment reflected the technological and geopolitical competition of the era, contributing to the Soviet Union's ability to monitor adversarial military activities and communications. The Tselina program, including the Tselina-O model, represented a significant investment in space-based intelligence capabilities, underscoring the importance of satellite technology in modern warfare and espionage.

## Notable For
- **First Flight**: One of the earliest Soviet signals intelligence satellites, with its first launch in 1968.
- **Manufacturing Collaboration**: Developed by the Pivdenne Design Office, with payload contributions from TsNIRTI, showcasing inter-institutional cooperation.
- **GRAU Index**: Identified by the unique GRAU index 11Ф616, distinguishing it within the Soviet military's classification system.
- **Part of Tselina Family**: A key model within the broader Tselina program, which included other variants like Tselina-OK and Tselina-OM.
- **Cold War Significance**: Played a vital role in the Soviet Union's electronic intelligence gathering during a pivotal period in global military history.

## Body
### Overview
Tselina-O is a model of signals intelligence satellite developed by the Soviet Union. It was designed to intercept and analyze electronic signals, including communications and radar emissions, for military reconnaissance purposes.

### Development and Manufacturing
- **Primary Manufacturer**: Pivdenne Design Office, a major Soviet aerospace engineering firm.
- **Payload Developer**: TsNIRTI (Central Scientific Research Institute for Radio Engineering), a Soviet/Russian research institute founded in 1943.
- **First Launch**: The inaugural launch of Tselina-O occurred on January 19, 1968.

### Technical Specifications
- **GRAU Index**: 11Ф616, a classification code used by the Soviet military.
- **Aliases**: Also known as Zelina-O or 11Ф616.

### Role in the Tselina Program
Tselina-O is part of the Tselina family of signals intelligence satellites, which includes:
- **Tselina-OK**: Another model within the same program.
- **Tselina-OM**: A later variant of the Tselina series.

### Historical Context
The Tselina program, including the Tselina-O model, was developed during the Cold War to enhance the Soviet Union's electronic intelligence capabilities. These satellites were crucial for monitoring adversarial military communications and activities, providing strategic insights during a period of intense geopolitical tension.

## Schema Markup
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## References

1. [Source](https://space.skyrocket.de/doc_sdat/tselina-o.htm)
2. Jonathan's Space Report