# Navigation Technology Satellite-3

> American experimental military navigation satellite

**Wikidata**: [Q135670556](https://www.wikidata.org/wiki/Q135670556)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Navigation_Technology_Satellite_3)  
**Source**: https://4ort.xyz/entity/navigation-technology-satellite-3

## Summary
Navigation Technology Satellite-3 (NTS-3) is an American experimental military navigation satellite launched on August 13, 2025, to demonstrate advanced Positioning, Navigation, and Timing (PNT) technologies in geostationary orbit. Developed by the Air Force Research Laboratory (AFRL) and L3Harris Technologies, it is part of the U.S. military's effort to modernize navigation systems and ensure resilient PNT capabilities.

## Key Facts
- **Launch Date**: August 13, 2025, at 00:56 UTC.
- **Country**: United States.
- **Operator**: Air Force Research Laboratory (AFRL).
- **Mass**: 1,250 kilograms.
- **Launch Vehicle**: Vulcan rocket (V-003), launched from Cape Canaveral Space Launch Complex 41.
- **Preceded By**: Navigation Technology Satellite-2 (NTS-2).
- **Spacecraft Bus**: ESPAStar, manufactured by L3Harris Technologies (prime contractor) and Northrop Grumman (subcontractor).
- **Orbit**: Geostationary.
- **COSPAR ID**: 2025-173A.
- **Mission Designation**: USSF-106.

## FAQs
### Q: What is the primary purpose of NTS-3?
A: NTS-3 is a technology demonstration mission to test advanced Positioning, Navigation, and Timing (PNT) systems in geostationary orbit, aiming to enhance military navigation capabilities and resilience.

### Q: Who developed and launched NTS-3?
A: NTS-3 was developed by the Air Force Research Laboratory (AFRL) and L3Harris Technologies, with Northrop Grumman contributing the ESPAStar bus. It was launched by United Launch Alliance (ULA) aboard a Vulcan rocket.

### Q: Why is NTS-3 significant?
A: NTS-3 is the first satellite in the NTS series to operate in geostationary orbit, offering continuous coverage of the Western Hemisphere. It demonstrates technologies to modernize U.S. military PNT systems and reduce reliance on GPS.

## Why It Matters
NTS-3 plays a critical role in advancing U.S. military navigation capabilities by testing resilient PNT technologies in geostationary orbit. Unlike GPS satellites in medium Earth orbit, NTS-3’s geostationary position provides persistent coverage of the Americas, enabling real-time communication and navigation support. The mission addresses growing concerns about GPS vulnerability to interference or attack, offering alternative PNT solutions for joint military operations. By combining radio frequency and direct-to-user optical communications, NTS-3 paves the way for next-generation hybrid navigation systems, ensuring U.S. forces maintain operational superiority in contested environments.

## Notable For
- **First Geostationary NTS Mission**: Operates in a fixed orbital position over the equator, unlike its predecessors in lower orbits.
- **ESPAStar Bus**: Utilizes a cost-effective, modular spacecraft platform designed for hosting multiple payloads.
- **Vulcan Rocket Debut**: One of the earliest missions for ULA’s Vulcan launch vehicle, marking a transition from legacy Atlas V rockets.
- **Resilient PNT Demonstration**: Tests advanced navigation signals and optical communications to counter GPS disruptions.
- **Military Modernization**: Supports the U.S. Space Force’s push for adaptive, multi-domain PNT architectures.

## Body
### Launch and Deployment
- **Date/Time**: Launched on August 13, 2025, at 00:56 UTC.
- **Site**: Cape Canaveral Space Launch Complex 41.
- **Vehicle**: Vulcan rocket (V-003), part of ULA’s USSF-106 mission.
- **Payload**: NTS-3 satellite with a 1,250 kg mass, powered by solar arrays.

### Design and Development
- **Manufacturers**: 
  - **Prime Contractor**: L3Harris Technologies.
  - **Subcontractor**: Northrop Grumman (ESPAStar bus).
- **Developers**: Air Force Research Laboratory (AFRL) and L3Harris.
- **Inception**: Program began in 2019, with critical design review completed by 2023.

### Mission Objectives
- **Technology Demonstration**: Test advanced PNT systems, including radio frequency and optical navigation signals.
- **Geostationary Operations**: Provide continuous coverage of the Western Hemisphere from a fixed orbital slot.
- **Resiliency**: Validate technologies to mitigate GPS vulnerabilities, such as anti-jamming and alternative navigation methods.

### Legacy
- **Predecessors**: Follows NTS-1 (1970s) and NTS-2 (1980s), which tested early PNT concepts in lower orbits.
- **Future Impact**: Inform future military satellite navigation systems, including potential integration with the U.S. Space Force’s architecture.

## Schema Markup
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  "@type": "Thing",
  "name": "Navigation Technology Satellite-3",
  "description": "American experimental military navigation satellite",
  "url": "https://afresearchlab.com/technology/nts-3",
  "sameAs": ["https://en.wikipedia.org/wiki/Navigation_Technology_Satellite_3"],
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## References

1. [Source](https://space.skyrocket.de/doc_sdat/nts-3.htm)
2. [Source](https://www.afrl.af.mil/News/Article-Display/Article/4272257/afrls-nts-3-vanguard-set-for-launch-aboard-ula-vulcan-rocket/)
3. [Source](https://spacenews.com/northrop-grumman-delivers-espastar-bus-to-l3harris-for-air-force-nts-3-mission/)
4. [Latest milestone brings NTS-3 Vanguard closer to 2023 launch. 2023](https://www.afrl.af.mil/News/Article-Display/Article/3278985/latest-milestone-brings-nts-3-vanguard-closer-to-2023-launch/)
5. Space-Track
6. Jonathan's Space Report
7. [Source](https://nextspaceflight.com/launches/details/5054)