# Transit Research and Attitude Control

> U.S. Navy satellite

**Wikidata**: [Q54387](https://www.wikidata.org/wiki/Q54387)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Transit_Research_and_Attitude_Control)  
**Source**: https://4ort.xyz/entity/transit-research-and-attitude-control

## Summary
Transit Research and Attitude Control (TRAAC) was a U.S. Navy military satellite launched in 1961 to support navigation research and satellite attitude control experiments. It was part of the broader Transit program, which pioneered the use of satellites for naval navigation. TRAAC became nonfunctional in 1962 and is now considered a derelict satellite.

## Key Facts
- Official name: Transit Research and Attitude Control (TRAAC)
- Aliases: TRAAC
- Country: United States
- Operator: United States Navy
- Instance of: Military satellite, Derelict satellite
- COSPAR ID: 1961-031B
- NSSDCA ID: 1961-031B
- Launch date: November 15, 1961, at 22:26 UTC
- Launch site: Cape Canaveral Space Launch Complex 17B
- Launch vehicle: Thor-Ablestar (flight designation: 305/AB009)
- Orbit: Low Earth orbit
- Significant events:
  - Launched on November 15, 1961
  - Signal lost on August 12, 1962
- Harvard designation: 1961 Alpha Eta 2
- Part of: Transit program

## FAQs
### Q: What was the purpose of Transit Research and Attitude Control?
A: TRAAC was designed to conduct research into satellite attitude control and support early satellite-based navigation systems under the U.S. Navy’s Transit program.

### Q: When was TRAAC launched and when did it stop functioning?
A: TRAAC was launched on November 15, 1961, and ceased operations after losing signal on August 12, 1962.

### Q: Who operated the TRAAC satellite?
A: The satellite was operated by the United States Navy as part of its efforts to develop space-based navigation capabilities.

## Why It Matters
Transit Research and Attitude Control played a critical role in advancing satellite technology during the early years of the space age. As part of the pioneering Transit program, TRAAC contributed to the development of satellite-based navigation systems, laying foundational groundwork for modern GPS technology. Its experimental focus on attitude control helped improve understanding of how satellites can maintain proper orientation in orbit—essential for both military and civilian applications. Though operational only briefly, TRAAC exemplifies early Cold War-era innovation in space-based defense and navigation technologies.

## Notable For
- One of the earliest dedicated military navigation research satellites
- First use of active attitude control systems in the Transit program
- Launched using the Thor-Ablestar, a key early American launch vehicle
- Became one of the first recognized derelict satellites after mission completion
- Provided engineering insights that influenced future satellite design and operation

## Body
### Overview
Transit Research and Attitude Control (TRAAC), also known by its abbreviated form TRAAC, was a U.S. Navy satellite launched in 1961. It served as a testbed for navigation and attitude control technologies within the broader Transit program, which aimed to provide accurate positioning for naval vessels through satellite signals.

### Mission and Objectives
The primary objectives of TRAAC included:
- Testing new methods of satellite attitude control
- Supporting the development of the Transit navigation system
- Collecting data on orbital behavior and satellite performance

These goals were aligned with the strategic needs of the U.S. Navy during the early 1960s, particularly in improving maritime navigation accuracy via space-based assets.

### Technical Details
- **Launch Date**: November 15, 1961, at 22:26 UTC
- **Launch Site**: Cape Canaveral Space Launch Complex 17B
- **Launch Vehicle**: Thor-Ablestar (Flight 305/AB009)
- **Orbit Type**: Low Earth Orbit
- **Harvard Designation**: 1961 Alpha Eta 2

TRAAC incorporated experimental systems to manage its orientation in orbit—a crucial capability for maintaining communication and navigation signal integrity.

### Operational Timeline
- **November 15, 1961**: Successfully launched aboard a Thor-Ablestar rocket
- **August 12, 1962**: Signal lost; satellite officially became non-operational
- Post-1962: Classified as a derelict satellite due to abandonment and lack of function while remaining in orbit

Despite its short lifespan, TRAAC gathered valuable engineering data that informed later missions in the Transit constellation.

### Legacy
As part of the Transit program, TRAAC contributed to technological developments that eventually led to the Global Positioning System (GPS). Its role in refining satellite attitude control mechanisms made it an important step toward more sophisticated spacecraft autonomy and reliability. Today, it stands as a historical artifact of early military space exploration and Cold War innovation.

## References

1. Jonathan's Space Report
2. Freebase Data Dumps. 2013