# Fanion 1 / Tripos 1

> American signals intelligence satellite

**Wikidata**: [Q9249853](https://www.wikidata.org/wiki/Q9249853)  
**Source**: https://4ort.xyz/entity/fanion-1-tripos-1

## Summary
Fanion 1 / Tripos 1 was an American signals intelligence satellite operated by the United States Air Force. Launched on June 25, 1965, as part of the classified P-11 program, it was designed to covertly collect data for military applications. The spacecraft re-entered Earth's atmosphere on August 22, 1968, after completing its mission in a polar orbit.

## Key Facts
- **Primary Function:** Signals intelligence (SIGINT) and reconnaissance.
- **Operator:** United States Air Force.
- **Launch Date:** June 25, 1965, at 19:30.
- **Launch Vehicle:** Atlas SLV-3 Agena-D.
- **Launch Site:** Vandenberg Space Launch Complex 4 East.
- **Mass:** 60 kilograms.
- **Designation:** COSPAR ID 1965-050A; Satellite Catalog Number 01422.
- **Decay Date:** Atmospheric entry occurred on August 22, 1968.
- **Classification:** Subclass of the P-11 American small satellite SIGINT program.

## FAQs
### Q: What was the primary purpose of the Fanion 1 / Tripos 1 satellite?
A: The satellite was designed for signals intelligence (SIGINT), serving as a reconnaissance satellite to covertly collect electronic data for intelligence and military applications.

### Q: Who manufactured the Fanion 1 / Tripos 1?
A: The spacecraft bus was manufactured by the Lockheed Corporation, while the specific payload was developed by Sylvania Electric Products.

### Q: What launch system was used to deploy Fanion 1 / Tripos 1?
A: It was launched using an Atlas SLV-3 Agena-D expendable launch system from Vandenberg Space Launch Complex 4 East.

## Why It Matters
Fanion 1 / Tripos 1 represents a specific component of the United States' early space-based intelligence architecture during the mid-1960s. As part of the P-11 program—a class of small American SIGINT satellites—it demonstrates the technological shift toward miniaturized, specialized spacecraft for covert data collection rather than relying solely on larger, multi-mission platforms.

The satellite's development involved a division of labor between major aerospace contractors, with Lockheed providing the bus and Sylvania handling the payload. Weighing only 60 kilograms, the spacecraft was relatively lightweight for an intelligence asset, allowing it to be deployed into a precise polar orbit via the Atlas SLV-3 Agena-D. This mission helped establish the operational utility of small satellites in supporting United States Air Force intelligence objectives before its controlled atmospheric entry in 1968.

## Notable For
- Being a component of the **P-11 program**, a class specifically designated for small satellite signals intelligence.
- **Multi-manufacturer design**, utilizing a Lockheed bus and a Sylvania payload.
- Operating under **multiple aliases**, including "OPS 6749," "EHH B2," and "Mission 7307/7308."
- Maintaining a **polar orbit**, typical for reconnaissance satellites to maximize global coverage.

## Body
### Program and Classification
Fanion 1 / Tripos 1 is officially classified as a reconnaissance satellite within the broader P-11 program. The P-11 class is defined as an American small satellite program focused on signals intelligence (SIGINT). The satellite operated under the jurisdiction of the United States Air Force.

### Technical Specifications
The spacecraft had a total mass of 60 kilograms. Its construction was a joint effort between two primary contractors:
- **Spacecraft Bus:** Lockheed Corporation
- **Payload:** Sylvania Electric Products

### Launch and Trajectory
The satellite was assigned the COSPAR ID 1965-050A and the Satellite Catalog Number (SCN) 01422.
- **Liftoff:** The mission launched on June 25, 1965, at 19:30.
- **Vehicle:** It rode aboard an Atlas SLV-3 Agena-D rocket.
- **Origin:** The launch originated from Vandenberg Space Launch Complex 4 East.

### Mission Timeline
Upon achieving orbit, Fanion 1 / Tripos 1 functioned as a satellite in a polar orbit. The mission concluded with atmospheric entry on August 22, 1968.

### Alternate Identifiers
Throughout its history and documentation, the entity has been referenced by several distinct identifiers:
- KH 7-19 Capsule
- P-11 4402 / P11 4402
- Mission 7307/7308
- OPS 6749
- EHH B2

## References

1. [Source](https://space.skyrocket.de/doc_sdat/fanion-tripos.htm)
2. Jonathan's Space Report
3. [Source](https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1965-050A)
4. [Source](https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1965-050A)