| Group Name | Description | File Count |
|---|---|---|
| SYNOP-2008 | SYNOP obs data for 2008 | 268 |
| SYNOP-2009 | SYNOP obs data for 2009 | 365 |
| SYNOP-2010 | SYNOP obs data for 2010 | 352 |
| SYNOP-2011 | SYNOP obs data for 2011 | 365 |
| SYNOP-2012 | SYNOP obs data for 2012 | 365 |
| SYNOP-2013 | SYNOP obs data for 2013 | 365 |
| SYNOP-2014 | SYNOP obs data for 2014 | 363 |
| SYNOP-2015 | SYNOP obs data for 2015 | 364 |
| SYNOP-2016 | SYNOP obs data for 2016 | 366 |
| SYNOP-2017 | SYNOP obs data for 2017 | 365 |
| SYNOP-2018 | SYNOP obs data for 2018 | 365 |
| SYNOP-2019 | SYNOP obs data for 2019 | 365 |
| SYNOP-2020 | SYNOP obs data for 2020 | 366 |
| SYNOP-2021 | SYNOP obs data for 2021 | 365 |
| SYNOP-2022 | SYNOP obs data for 2022 | 229 |
| SYNOP-2023 | SYNOP obs data for 2023 | 173 |
| SYNOP-2024 | SYNOP obs data for 2024 | 366 |
| SYNOP-2025 | SYNOP obs data for 2025 | 225 |