Sentinel-1D
Sentinel-1 satellite (radar antenna missing) | |
| Mission type | Earth observation |
|---|---|
| Operator | ESA |
| COSPAR ID | 2025-251A |
| SATCAT no. | 66315 |
| Website | Sentinel-1 (ESA) |
| Mission duration | Planned: 7 years 4 months, 15 days (in progress) |
| Spacecraft properties | |
| Spacecraft type | Sentinel-1 |
| Bus | Prima |
| Manufacturer | Thales Alenia Space Airbus Defence and Space |
| Launch mass | 2,164 kg (4,771 lb) |
| Start of mission | |
| Launch date | 4 November 2025, 21:03 UTC |
| Rocket | Ariane 62 (VA265) |
| Launch site | Kourou ELA-4 |
| Contractor | Arianespace |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Altitude | 693 km |
Sentinel-1D is a European radar imaging satellite launched in November 2025. It is the second of two additional satellites, and the fourth satellite overall, in the Sentinel-1 constellation, part of the European Union's Copernicus programme for Earth observation. The satellite is equipped with a C-SAR sensor, capable of providing high-resolution imagery regardless of weather conditions. It is designed to replace Sentinel-1A, which had been in orbit for 11 years at the time of Sentinel-1D's launch, long beyond its planned mission duration. Sentinel-1D will work in tandem with Sentinel-1C, orbiting 180° apart.