Table 1. Ground sites and time periods used for FAPAR reference measurements in this study.
Note that most sites consist of 2–3 individual ground stations in proximity to each other, resulting in a total of 74 individual ground stations.
| Site name | Network | IGBP class | Start date | End date |
|---|---|---|---|---|
| Bartlett experimental forest | NEON | Mixed forest | 2014-05 | 2021-10 |
| Blandy experimental farm | NEON | Deciduous broadleaf | 2015-04 | 2021-10 |
| Central plains experimental range | NEON | Grasslands | 2014-03 | 2021-10 |
| Dead lake | NEON | Deciduous broadleaf | 2016-03 | 2021-10 |
| Guanica forest | NEON | Evergreen broadleaf | 2015-07 | 2021-12 |
| Hainich | FluxNet | Mixed forest | 2019-08 | 2020-10 |
| Harvard forest | NEON | Mixed forest | 2014-05 | 2021-10 |
| Jones ecological research center | NEON | Evergreen needleleaf | 2013-06 | 2016-07 |
| Jornada | NEON | Open shrublands | 2015-06 | 2021-11 |
| Konza prairie biological station | NEON | Croplands | 2017-07 | 2021-10 |
| Lajas experimental station | NEON | Grasslands | 2016-04 | 2021-12 |
| Litchfield savanna | TERN | Woody savannas | 2020-11 | 2022-02 |
| Moab | NEON | Open shrublands | 2015-05 | 2021-09 |
| Niwot ridge mountain research station | NEON | Evergreen needleleaf | 2017-07 | 2021-09 |
| Oak ridge | NEON | Mixed forest | 2015-03 | 2021-10 |
| Onaqui ault | NEON | Open shrublands | 2014-05 | 2021-09 |
| Ordway swisher biological station | NEON | Evergreen needleleaf | 2013-04 | 2021-12 |
| Santa Rita | NEON | Closed shrublands | 2016-04 | 2021-10 |
| Smithsonian conservation biology institute | NEON | Mixed forest | 2014-06 | 2021-11 |
| Smithsonian environmental research center | NEON | Croplands | 2015-04 | 2021-10 |
| Steigerwaldt land services | NEON | Deciduous broadleaf | 2015-07 | 2021-09 |
| Talladega national forest | NEON | Evergreen needleleaf | 2014-05 | 2021-10 |
| Tumbarumba | FluxNet | Evergreen broadleaf | 2019-07 | 2020-12 |
| Underc | NEON | Mixed forest | 2015-09 | 2021-10 |
| Valencia anchor station | SM | Cropland mosaics | 2019-07 | 2021-02 |
| Woodworth | NEON | Grasslands | 2014-05 | 2015-10 |