# IRNSS-1D

> 40547

**Wikidata**: [Q15694173](https://www.wikidata.org/wiki/Q15694173)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/IRNSS-1D)  
**Source**: https://4ort.xyz/entity/irnss-1d

## Summary
IRNSS-1D is a navigation satellite launched by India's Indian Space Research Organisation (ISRO) on March 28, 2015, as part of the Indian Regional Navigation Satellite System (IRNSS). It was part of a constellation of satellites designed for regional navigation services, weighing 1,425 kilograms and launched via the Polar Satellite Launch Vehicle-XL from the Satish Dhawan Space Centre.

## Key Facts
- **Satellite class**: Navigation satellite, part of the IRNSS constellation.
- **Operator**: Indian Space Research Organisation (ISRO).
- **Launch date**: March 28, 2015.
- **Launch vehicle**: Polar Satellite Launch Vehicle-XL (PSLV-XL).
- **Launch site**: Satish Dhawan Space Centre First Launch Pad.
- **Mass**: 1,425 kilograms.
- **Orbit**: Geostationary transfer orbit.
- **COSPAR ID**: 2015-018A.
- **Preceded by**: IRNSS-1E (another Indian navigation satellite).
- **Country of origin**: India.

## FAQs
### Q: What was the purpose of IRNSS-1D?
A: IRNSS-1D was part of India's IRNSS constellation, designed to provide regional navigation services, including accurate positioning and timing for users in India and surrounding regions.

### Q: How was IRNSS-1D launched?
A: It was launched on March 28, 2015, using the Polar Satellite Launch Vehicle-XL (PSLV-XL) from the Satish Dhawan Space Centre First Launch Pad in India.

### Q: What was the mass of IRNSS-1D?
A: The satellite weighed 1,425 kilograms at launch.

### Q: What orbit did IRNSS-1D operate in?
A: IRNSS-1D was placed in a geostationary transfer orbit after launch.

### Q: Who operated IRNSS-1D?
A: The satellite was operated by the Indian Space Research Organisation (ISRO).

## Why It Matters
IRNSS-1D was a critical component of India's IRNSS, which aimed to provide an independent regional navigation system similar to GPS. The constellation was designed to offer accurate positioning, navigation, and timing services for both civilian and military applications. The successful deployment of IRNSS-1D contributed to India's self-reliance in satellite-based navigation technology, reducing dependence on foreign systems. The IRNSS constellation, including IRNSS-1D, played a significant role in enhancing India's space capabilities and supporting various applications such as transportation, disaster management, and military operations.

## Notable For
- **Part of India's IRNSS constellation**: One of several satellites launched to provide regional navigation services.
- **Launched by ISRO**: Demonstrated India's capability in satellite deployment and navigation technology.
- **Operated in geostationary transfer orbit**: Positioned for regional coverage and signal transmission.
- **Contributed to India's space independence**: Reduced reliance on foreign navigation systems like GPS.
- **Supported multiple applications**: Enabled accurate positioning for transportation, disaster management, and military use.

## Body
### Overview
IRNSS-1D was a navigation satellite developed and operated by the Indian Space Research Organisation (ISRO) as part of the Indian Regional Navigation Satellite System (IRNSS). The satellite was launched on March 28, 2015, using the Polar Satellite Launch Vehicle-XL (PSLV-XL) from the Satish Dhawan Space Centre First Launch Pad in India.

### Technical Specifications
- **Mass**: The satellite weighed 1,425 kilograms at launch.
- **Orbit**: IRNSS-1D was placed in a geostationary transfer orbit, allowing it to provide navigation services over India and surrounding regions.
- **COSPAR ID**: The satellite's COSPAR ID was 2015-018A.

### Launch and Deployment
- **Launch Vehicle**: The satellite was launched using the PSLV-XL, a variant of the Polar Satellite Launch Vehicle designed for heavier payloads.
- **Launch Site**: The launch took place from the Satish Dhawan Space Centre First Launch Pad, a key facility for ISRO's satellite missions.

### Role in IRNSS
- **Constellation**: IRNSS-1D was part of a constellation of seven satellites designed to provide regional navigation services, including accurate positioning and timing.
- **Applications**: The IRNSS constellation supported various applications, including transportation, disaster management, and military operations.

### Significance
- **India's Space Independence**: The IRNSS constellation, including IRNSS-1D, contributed to India's self-reliance in satellite-based navigation technology, reducing dependence on foreign systems like GPS.
- **Technological Achievement**: The successful deployment of IRNSS-1D demonstrated ISRO's capability in satellite deployment and navigation technology.

## References

1. [Source](https://www.isro.gov.in/launchers/list-of-pslv-launches)
2. Jonathan's Space Report
3. [Source](https://www.isro.gov.in/spacecraft/list-of-navigation-satellites)
4. BabelNet