# PSLV Orbital Experiment Module

> satellite bus derived out of launch vehicle upper stage

**Wikidata**: [Q121238986](https://www.wikidata.org/wiki/Q121238986)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/PSLV_Orbital_Experiment_Module)  
**Source**: https://4ort.xyz/entity/pslv-orbital-experiment-module

## Summary
The PSLV Orbital Experiment Module (POEM) is a spacecraft platform that functions as a satellite bus derived from the upper stage of a launch vehicle. It is classified as a subclass of spacecraft and is utilized for orbital experiments. The platform includes specific iterations such as POEM-1, POEM-2, and POEM-3.

## Key Facts
- **Definition:** The PSLV Orbital Experiment Module is a satellite bus derived out of a launch vehicle upper stage.
- **Classification:** It is a subclass of spacecraft (a vehicle or machine designed to fly in space).
- **Parent Category:** Spacecraft.
- **Variants:** The system includes related specific entities designated as POEM-1, POEM-2, and POEM-3.
- **Wikidata Identifier:** The entity has a sitelink count of 2 and is categorized under "PSLV Orbital Experiment Module" on Wikimedia Commons.
- **Language Availability:** Information regarding the module is available in English and on Wikimedia Commons.

## FAQs
### Q: What exactly is the PSLV Orbital Experiment Module?
A: The PSLV Orbital Experiment Module is a satellite bus created by repurposing the upper stage of a launch vehicle. It serves as a platform for spaceflight.

### Q: How is the PSLV Orbital Experiment Module classified?
A: It is classified as a type of spacecraft. Specifically, it falls under the subclass of spacecraft designed to function as a satellite bus derived from launch vehicle components.

### Q: What are the known versions of this module?
A: According to structured data, the related specific spacecraft entities are identified as POEM-1, POEM-2, and POEM-3.

## Why It Matters
The PSLV Orbital Experiment Module represents a significant innovation in space technology by transforming the upper stage of a launch vehicle—the section typically discarded or deactivated after deployment—into a functional satellite bus. By repurposing this hardware, the module maximizes the utility of launch vehicle components that would otherwise become space debris.

This approach allows for continued operation of the upper stage as a spacecraft, effectively turning waste into a functional orbital platform. It plays a crucial role in orbital experimentation by providing a modular structure (as seen in variants POEM-1 through POEM-3) capable of supporting payloads in space. This methodology contributes to more sustainable and efficient use of launch resources in the space industry.

## Notable For
- **Unique Derivation:** It is distinct as a satellite bus specifically derived from a launch vehicle's upper stage.
- **Spacecraft Classification:** Unlike standard upper stages that are mere propulsion units, this module is formally classified as a spacecraft in its own right.
- **Iterative Development:** The existence of multiple specific entities (POEM-1, POEM-2, and POEM-3) indicates an active, evolving series of experimental platforms.
- **Resource Efficiency:** It distinguishes itself by repurposing propulsion hardware for continued orbital use.

## Body
### Technical Definition
The PSLV Orbital Experiment Module is defined as a satellite bus. Unlike primary satellites that are deployed by a launch vehicle, this module is constructed from the upper stage of the vehicle itself. It maintains the classification of a spacecraft, defined broadly as a vehicle or machine designed to fly in space.

### Operational Variants
Structured knowledge data identifies three specific real-world iterations of this entity:
*   **POEM-1:** Identified as a related spacecraft thing.
*   **POEM-2:** Identified as a related spacecraft thing.
*   **POEM-3:** Identified as a related spacecraft thing.

### Structured Data Profile
The entity is categorized under the class of "spacecraft." It maintains a digital presence through the Wikipedia title "PSLV Orbital Experiment Module" and is filed under the "PSLV Orbital Experiment Module" category on Wikimedia Commons. The Wikidata description explicitly labels it as a "satellite bus derived out of launch vehicle upper stage."