# ITOS-I

> TOS-I was the 3rd in a series of third-generation spacecraft in the National Operational Meteorological Satellite System (NOMSS).

**Wikidata**: [Q113274440](https://www.wikidata.org/wiki/Q113274440)  
**Source**: https://4ort.xyz/entity/itos-i

## Summary
ITOS-I was an American meteorological satellite that served as the third spacecraft in the third-generation series of the National Operational Meteorological Satellite System (NOMSS). It was an instance of the Improved TIROS Operational System and was launched on July 1, 1977. The satellite was deployed into orbit using a Delta launch vehicle from Vandenberg Space Launch Complex 2 East.

## Key Facts
- **Launch Date:** July 1, 1977
- **Classification:** Instance of the Improved TIROS Operational System
- **Series Position:** 3rd in a series of third-generation spacecraft in NOMSS
- **Launch Site:** Vandenberg Space Launch Complex 2 East
- **Launch Vehicle:** Delta (family of expendable launch systems)
- **System Affiliation:** National Operational Meteorological Satellite System (NOMSS)
- **NSSDCA ID:** ITOS-I

## FAQs
### Q: What specific satellite system did ITOS-I belong to?
A: ITOS-I was part of the Improved TIROS Operational System, serving as a model of an American meteorological satellite within the broader National Operational Meteorological Satellite System (NOMSS).

### Q: When and where was ITOS-I launched?
A: ITOS-I was launched on July 1, 1977, from the Vandenberg Space Launch Complex 2 East.

### Q: What vehicle was used to launch ITOS-I?
A: The satellite was launched using a Delta vehicle, which is a family of expendable launch systems.

### Q: What distinguishes ITOS-I within its series?
A: ITOS-I (also referred to as TOS-I in descriptions) is noted as being the third in a series of third-generation spacecraft developed for the National Operational Meteorological Satellite System.

## Why It Matters
ITOS-I represents a specific phase in the evolution of American meteorological satellite technology. As the third unit in a series of third-generation spacecraft for the National Operational Meteorological Satellite System (NOMSS), its existence underscores the continuity and operational expansion of weather monitoring capabilities during the late 1970s.

The satellite's classification as an "Improved TIROS Operational System" vessel highlights the technological iterations being made over earlier TIROS (Television Infrared Observation Satellite) prototypes. By utilizing the Delta launch system—a family with extensive use in American space history—the mission reflects the standardization of launch logistics for environmental monitoring payloads during that era. Launched from Vandenberg Space Launch Complex 2 East, ITOS-I contributed to the network of satellites required for comprehensive, real-time meteorological data collection, serving as a node in the infrastructure that supports modern weather forecasting.

## Notable For
- Being the **3rd spacecraft** in the third-generation series of the National Operational Meteorological Satellite System (NOMSS).
- Operating as a key instance of the **Improved TIROS Operational System**.
- Launching aboard the widely utilized **Delta** expendable launch system.
- Deployment from the specific **Vandenberg Space Launch Complex 2 East** facility.

## Body

### Mission Classification and Design
ITOS-I, identified in technical records as an instance of the Improved TIROS Operational System, was a model of American meteorological satellite. It held the distinction of being the third spacecraft in a series of third-generation vehicles developed for the National Operational Meteorological Satellite System (NOMSS). Descriptions of the satellite also refer to it by the designation TOS-I.

### Launch and Deployment Operations
The satellite was successfully launched on July 1, 1977. The mission utilized the Delta family of expendable launch systems to achieve orbit. The launch originated from Vandenberg Space Launch Complex 2 East, a specific pad designed for such orbital insertions.

### System Context
As part of the Improved TIROS Operational System, ITOS-I contributed to the ongoing efforts of the National Operational Meteorological Satellite System. Its position as the third satellite in its specific generation marks a specific point in the timeline of NOMSS development and deployment.