Level-1 GRD products are available in one of three spatial resolutions:
- Full Resolution (FR) for SM mode
- High Resolution (HR) for SM, IW and EW modes
- Medium Resolution (MR) for SM, IW, EW and WV modes.
The spatial resolution of GRD products in the tables below corresponds to the mid-range value at mid-orbit altitude, averaged over all swaths (SM/WV) or sub-swaths (IW/EW). The range resolution is ground range. The equivalent number of looks (ENL) for IW and EW GRD products corresponds to an average over all sub-swaths.
| Mode | Resolution rg x az |
Pixel spacing rg x az |
Number of looks | ENL |
| SM | 9x9 m | 3.5x3.5 m | 2x2 | 3.7 |
| Mode | Resolution rg x az |
Pixel spacing rg x az |
Number of looks | ENL |
| SM | 23x23 m | 10x10 m | 6x6 | 29.7 |
| IW | 20x22 m | 10x10 m | 5x1 | 4.4 |
| EW | 50x50 m | 25x25 m | 3x1 | 2.7 |
| Mode | Resolution rg x az |
Pixel spacing rg x az |
Number of looks | ENL |
| SM | 84x84 m | 40x40 m | 22x22 | 398.4 |
| IW | 88x87 m | 40x40 m | 22x5 | 81.8 |
| EW | 93x87 m | 40x40 m | 6x2 | 10.7 |
| WV | 52x51 m | 25x25 m | 13x13 | 123.7 |
Further information can be found in the Sentinel-1 Product Definition document, S1-RS-MDA-52-7440.