# Hongtu-1

> Chinese commercial X-band interferometric synthetic aperture radar satellite constellation

**Wikidata**: [Q118903249](https://www.wikidata.org/wiki/Q118903249)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hongtu-1)  
**Source**: https://4ort.xyz/entity/hongtu-1

## Summary
Hongtu-1 is a Chinese commercial X-band interferometric synthetic aperture radar (InSAR) satellite constellation. It is part of the larger Hongtu constellation, designed for Earth observation using advanced radar technology.

## Key Facts
- Hongtu-1 is an instance of a spacecraft constellation and a subclass of synthetic aperture radar satellite.
- Its primary technologies are Interferometric Synthetic Aperture Radar (InSAR) and X-band radar.
- It was launched on March 30, 2023, at 10:50 local time.
- The launch vehicle was a Long March 2D rocket (specifically Y90 variant) from the Taiyuan Satellite Launch Center.
- The operator is the China Academy of Space Technology, and the manufacturer is GalaxySpace.
- It is also known by aliases including PIESAT-1, Nuwa-1, and various PIESAT-1X designations.
- Hongtu-1 is part of the larger Hongtu constellation.
- The entity has sitelink count of 2.

## FAQs
### Q: What is Hongtu-1?
A: Hongtu-1 is a Chinese commercial satellite constellation utilizing X-band Interferometric Synthetic Aperture Radar (InSAR) technology for Earth observation purposes.

### Q: Who operates Hongtu-1?
A: Hongtu-1 is operated by the China Academy of Space Technology.

### Q: When and where was Hongtu-1 launched?
A: Hongtu-1 was launched on March 30, 2023, at 10:50 from the Taiyuan Satellite Launch Center, aboard a Long March 2D rocket (Y90 variant).

### Q: What radar technology does Hongtu-1 use?
A: Hongtu-1 employs Interferometric Synthetic Aperture Radar (InSAR) operating in the X-band.

### Q: Who manufactured Hongtu-1?
A: Hongtu-1 was manufactured by GalaxySpace.

## Why It Matters
Hongtu-1 represents China's advancement into the commercial space-based radar observation market. As an X-band InSAR constellation, it provides high-resolution data for applications like disaster monitoring (e.g., detecting ground subsidence, landslides), infrastructure assessment, agricultural monitoring, and environmental change tracking. Its commercial nature signifies a shift towards more accessible, private-sector-driven Earth observation data within China and potentially globally, complementing existing government and military satellite systems. This constellation enhances the availability of SAR data, crucial for all-weather, day-and-night Earth observation.

## Notable For
- Being a commercial X-band interferometric synthetic aperture radar (InSAR) satellite constellation, a key segment in the growing commercial Earth observation market.
- Its development and operation by China Academy of Space Technology and manufacturer GalaxySpace, representing significant Chinese commercial space capability.
- Launching aboard a Long March 2D rocket (Y90 variant) from Taiyuan on March 30, 2023.
- Being part of the larger Hongtu constellation, indicating a planned multi-satellite system for enhanced coverage.
- Utilizing specifically X-band radar technology for its Earth observation missions.

## Body
### Overview
Hongtu-1 is a satellite constellation designed for Earth observation using radar technology. It falls under the class of synthetic aperture radar (SAR) satellites and is specifically designed as an interferometric SAR (InSAR) system operating in the X-band.

### Technical Specifications
- **Technology:** Utilizes Interferometric Synthetic Aperture Radar (InSAR).
- **Radar Band:** Operates in the X-band.
- **Instance:** Classified as both a spacecraft constellation and a subclass of synthetic aperture radar satellite.
- **Part Of:** Constitutes part of the broader Hongtu constellation.

### Operations & Ownership
- **Operator:** China Academy of Space Technology.
- **Manufacturer:** GalaxySpace.
- **Country:** People's Republic of China.

### Launch Details
- **Launch Date:** March 30, 2023.
- **Launch Time:** 10:50 (local time).
- **Launch Vehicle:** Long March 2D (specifically Y90 variant).
- **Launch Site:** Taiyuan Satellite Launch Center.
- **Launch Vehicle Class:** Chinese orbital carrier rocket.

### Identification & Aliases
- **Primary Aliases:** Includes PIESAT-1, Nuwa-1, PIESAT-1A-01, PIESAT-1B-01, PIESAT-1B-02, PIESAT-1B-03.
- **Wikipedia Title:** Hongtu-1.
- **Wikipedia Languages:** English, Hebrew.
- **Wikidata Description:** Chinese commercial X-band interferometric synthetic aperture radar satellite constellation.
- **Sitelink Count:** 2.

## References

1. Jonathan's Space Report