# Navigator

> Russian satellite bus

**Wikidata**: [Q67944760](https://www.wikidata.org/wiki/Q67944760)  
**Source**: https://4ort.xyz/entity/navigator-q67944760

Of course. Here is the structured knowledge entry for the entity "Navigator" based on the provided source material.

## Summary
Navigator is a Russian satellite bus, which is a general spacecraft model serving as the foundational infrastructure for multiple missions. It is officially known as the Basic Service Systems Module "Navigator" and is manufactured by the Russian aerospace company NPO Lavochkin. This platform provides the essential service module for spacecraft, including power, propulsion, and navigation, onto which specific mission payloads like scientific instruments are installed.

## Key Facts
- **Type:** Spacecraft bus (general model for building multiple spacecraft)
- **Manufacturer:** NPO Lavochkin, a major Russian aerospace design bureau.
- **Official Designation:** Basic Service Systems Module "Navigator".
- **Primary Function:** Serves as the service module and infrastructure for a spacecraft, providing locations for the payload.
- **Common Usage:** Typically used for space experiments and scientific instruments.
- **Aliases:** Also known as BMSS Navigator and the Navigator platform.
- **Classification:** A subclass of the broader entity "spacecraft bus".

## FAQs
**What is the Navigator platform used for?**
The Navigator satellite bus provides the core infrastructure and service module for spacecraft. Its primary role is to supply standard systems like power, attitude control, and propulsion, allowing mission planners to focus on integrating the specific scientific or experimental payload.

**Who builds the Navigator satellite bus?**
The platform is manufactured by NPO Lavochkin, a leading Russian company in the design of spacecraft and space probes. This company has a long history of developing interplanetary stations and satellites.

**How does a satellite bus like Navigator work?**
A spacecraft bus is a standardized model that forms the operational backbone of a satellite. The Navigator bus provides the essential subsystems needed for a mission to function in space, while the custom payload attached to it defines the mission's unique scientific or commercial purpose.

## Why It Matters
The Navigator platform represents a significant approach in spacecraft design by promoting standardization and reusability. Instead of building each new satellite from scratch, using a proven bus like Navigator reduces cost, development time, and risk. This enables more frequent and affordable missions, particularly in the realm of scientific research and space exploration, by providing a reliable and tested foundation. Its development by NPO Lavochkin places it within a key Russian aerospace program, supporting the country's strategic goals in space.

## Notable For
- Being a foundational Russian-made spacecraft bus designed by the historically significant NPO Lavochkin.
- Its role as a standardized service module that simplifies and accelerates satellite construction for various payloads.

## Body

### Manufacturer and Development
The Navigator satellite bus is produced by NPO Lavochkin, a major Russian (formerly Soviet) aerospace design bureau. NPO Lavochkin has a renowned history in space exploration, particularly for its development of interplanetary probes, satellites, and missile defense systems. The creation of the Navigator bus is part of the company's ongoing work to provide modern, standardized platforms for Russian space missions.

### Design and Function
As a spacecraft bus, the Navigator is not a complete satellite itself but rather the general model on which multiple-production spacecraft are based. Its design encompasses the fundamental infrastructure of a spacecraft. This includes the service module, which houses critical subsystems such as power generation and distribution, attitude control, thermal management, and propulsion. The bus provides standardized locations and interfaces for the integration of the payload, which consists of the mission-specific instruments or experiments.

### Mission Role and Payload Integration
The primary purpose of the Navigator platform is to serve as a reliable and reusable foundation for scientific and potentially other types of missions. By handling the general requirements of operating in space, the bus allows engineers and scientists to concentrate their resources on the payload, which defines the mission's unique objectives. Typical payloads for spacecraft using the Navigator bus include instruments for space experiments, such as those for astronomy, astrophysics, or Earth observation. This separation of the bus from the payload is a core principle in efficient spacecraft design.