1. Introduction
2. The Survey Instrument and Footprint
2.1. Camera
2.2. Filters
2.3. Footprint and Tiling
3. Observation
3.1. Survey Progress
3.2. Image Quality
4. Data Reduction
4.1. Image Processing
4.2. Astrometry
4.3. Photometric Calibration and Accuracy
5. Photometry
5.1. Photometry on Single-Exposure Images
5.2. Co-Added Catalogs
6. Analyses
6.1. Single-Epoch Depths
6.2. Full Depths
6.3. Comparison with the SDSS and DECaLS
7. Data Products and Data Access
7.1. Single-Epoch Images
7.2. Catalogs
8. Summary