# GPS Block IIRM

> GPS satellite block

**Wikidata**: [Q121831561](https://www.wikidata.org/wiki/Q121831561)  
**Source**: https://4ort.xyz/entity/gps-block-iirm

## Summary
GPS Block IIRM is a class of spacecraft models operated by the United States Space Force as part of the Global Positioning System (GPS). Manufactured by Lockheed Martin, it serves as a specific block of GPS satellites that succeeded the GPS Block IIR and was followed by the GPS Block IIF.

## Key Facts
- **Classification:** GPS Block IIRM is a subclass of the GPS satellite and is categorized as a spacecraft model.
- **Manufacturer:** The satellites in this block were manufactured by Lockheed Martin.
- **Operators:** The block is operated by the United States Space Force (preferred) and the United States Air Force.
- **Origin:** The country of origin is the United States.
- **Predecessor:** This block follows the GPS Block IIR.
- **Successor:** This block is followed by the GPS Block IIF.
- **Components:** The block comprises specific satellites including USA-183, USA-190, USA-192, USA-196, USA-199, USA-201, USA-203, and USA-206.
- **Aliases:** Also known as GPS Block IIR-M, GPS Block 2RM, GPS IIRM, Navstar-2RM, and Navstar-2R-M.

## FAQs
### Q: Who manufactures the GPS Block IIRM?
A: The GPS Block IIRM satellites are manufactured by Lockheed Martin.

### Q: Which satellites are included in the GPS Block IIRM?
A: The GPS Block IIRM includes the satellites USA-183, USA-190, USA-192, USA-196, USA-199, USA-201, USA-203, and USA-206.

### Q: What satellite block came before and after the GPS Block IIRM?
A: The GPS Block IIRM follows the GPS Block IIR and is succeeded by the GPS Block IIF.

## Why It Matters
The GPS Block IIRM represents a critical evolutionary step in the Global Positioning System infrastructure maintained by the United States. As a distinct iteration of spacecraft models, it bridges the operational gap between the earlier GPS Block IIR and the subsequent GPS Block IIF. Its development and deployment ensure the continuity and modernization of GPS services, which are vital for global navigation, military operations, and civilian applications.

Manufactured by Lockheed Martin and transitioning operationally to the United States Space Force, the Block IIRM signifies a shift in both technological capability and administrative oversight within the U.S. space architecture. The block includes a specific set of eight identified satellites (USA-183, USA-190, etc.), contributing to the constellation's robustness and reliability. By fitting into the lineage of NAVSTAR satellites, it upholds the system's role as a cornerstone of modern geopositioning.

## Notable For
- Being a modernized version ("M" designation) within the GPS Block IIR lineage.
- Transitioning operational control from the United States Air Force to the United States Space Force.
- Comprising a specific fleet of eight known satellites (USA-183 through USA-206).
- Serving as the direct predecessor to the GPS Block IIF.
- Being manufactured by Lockheed Martin, a major aerospace contractor.

## Body
### Development and Classification
The GPS Block IIRM (also referred to as GPS Block IIR-M or Navstar-2RM) is a spacecraft model classified as a subclass of the GPS satellite. It originates from the United States and fits into the broader framework of the NAVSTAR Global Positioning System.

### Manufacturing and Operation
**Manufacturer:** Lockheed Martin is credited with the manufacturing of the GPS Block IIRM, as referenced in aerospace documentation.

**Operators:** While historically associated with the United States Air Force, the preferred operator listed for the GPS Block IIRM is the United States Space Force, reflecting current organizational structures.

### Position in Sequence
The GPS Block IIRM occupies a specific chronological slot in the GPS timeline:
- **Preceded by:** GPS Block IIR
- **Followed by:** GPS Block IIF

### Fleet Composition
The block consists of several distinct space vehicles, identified by their USA designations:
- USA-183
- USA-190
- USA-192
- USA-196
- USA-199
- USA-201
- USA-203
- USA-206

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "GPS Block IIRM",
  "description": "A GPS satellite block manufactured by Lockheed Martin, operated by the United States Space Force, and part of the Global Positioning System.",
  "image": "https://commons.wikimedia.org/wiki/Special:FilePath/GPS-IIRM_(cropped).jpg",
  "additionalType": "Spacecraft Model"
}

## References

1. [Source](https://space.skyrocket.de/doc_sdat/navstar-2rm.htm)