# Intruder 11

> American military ocean surveillance and SIGINT satellite

**Wikidata**: [Q136169934](https://www.wikidata.org/wiki/Q136169934)  
**Source**: https://4ort.xyz/entity/intruder-11

## Summary
Intruder 11 is a U.S. military satellite designed for ocean surveillance and signals intelligence (SIGINT) gathering, launched in 2012 as part of the Naval Ocean Surveillance System (NOSS). It operates in low Earth orbit to detect and track maritime activity, supporting naval operations and national security efforts.

## Key Facts
- **Launch Date**: September 13, 2012, at 21:39:00 UTC.
- **Launch Vehicle**: Atlas V 401 (AV-033), operated by United Launch Alliance.
- **COSPAR ID**: 2012-048A.
- **Mass**: Approximately 3,250 kilograms.
- **Manufacturer**: Lockheed Martin Space.
- **Operator**: United States Navy.
- **Part of**: Naval Ocean Surveillance System (NOSS-3 series).
- **Preceded by**: Intruder 10; **Followed by**: Intruder 12.
- **Orbit**: Low Earth orbit.

## FAQs
### Q: What is the primary mission of Intruder 11?
A: Intruder 11 conducts ocean surveillance and signals intelligence (SIGINT) to monitor maritime activity, supporting U.S. naval operations and strategic defense initiatives.

### Q: When and how was Intruder 11 launched?
A: It was launched on September 13, 2012, aboard an Atlas V 401 rocket from Vandenberg Space Launch Complex 3 East.

### Q: How does Intruder 11 relate to other satellites in its series?
A: It is part of the NOSS-3 series, preceded by Intruder 10 and followed by Intruder 12, forming a constellation to enhance surveillance capabilities.

## Why It Matters
Intruder 11 plays a critical role in U.S. military intelligence by providing real-time data on oceanic movements, which is essential for tracking naval forces, ensuring maritime security, and maintaining strategic awareness. As part of the NOSS constellation, it contributes to a broader network of satellites that work in tandem to deliver comprehensive surveillance, addressing the challenge of monitoring vast ocean areas. Its capabilities directly support defense operations, crisis response, and international security efforts, underscoring its importance in modern military infrastructure.

## Notable For
- **Multi-Satellite Constellation**: Operates alongside companion satellites to triangulate and pinpoint signal sources.
- **Advanced SIGINT Capabilities**: Equipped to intercept and analyze electronic transmissions, such as radar and communication signals.
- **Low Earth Orbit Operations**: Enables high-resolution surveillance with frequent overpasses of target areas.
- **Long-Term Mission**: Designed for sustained operations, reflecting its role in ongoing national security strategies.

## Body
### Launch and Deployment
- **Date/Time**: Launched on September 13, 2012, at 21:39:00 UTC.
- **Site**: Vandenberg Space Launch Complex 3 East.
- **Rocket**: Atlas V 401 (tail number AV-033), contracted by United Launch Alliance.

### Technical Specifications
- **Mass**: ~3,250 kg.
- **Power**: Solar arrays for energy generation.
- **Orbit**: Low Earth orbit, optimized for maritime surveillance.

### Mission and Operations
- **Primary Role**: Ocean surveillance and SIGINT collection.
- **System Affiliation**: Part of the NOSS-3 series, replacing older NOSS satellites.
- **Operator**: U.S. Navy, with Lockheed Martin as the manufacturer.

### Preceded and Succeeded By
- **Predecessor**: Intruder 10 (NOSS-3 5A).
- **Successor**: Intruder 12 (NOSS-3 7A), launched later to maintain constellation integrity.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "Intruder 11",
  "description": "American military ocean surveillance and SIGINT satellite",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q117917469",
    "https://en.wikipedia.org/wiki/Naval_Ocean_Surveillance_System"
  ],
  "additionalType": "Signals intelligence satellite",
  "manufacturer": "Lockheed Martin Space",
  "operatingOrganisation": "United States Navy",
  "dateLaunched": "2012-09-13",
  "launchVehicle": "Atlas V 401"
}

## References

1. [Source](https://space.skyrocket.de/doc_sdat/noss-3.htm)
2. Jonathan's Space Report