GTSPP Data Product Centre| Year & Month(yyyymm) | observing line | Number of observations |
|---|---|---|
| 201407 | PX06 | 61 |
| 201503 | PX06 | 66 |
| 201509 | PX06 | 62 |
| 201603 | PX06 | 59 |
| 201311 | PX09 | 223 |
| 201405 | PX09 | 223 |
| 201412 | PX09 | 218 |
| 201505 | PX09 | 219 |
| 201511 | PX09 | 212 |
| 201310 | PX13 | 289 |
| 201403 | PX13 | 267 |
| 201409 | PX13 | 294 |
| 201410 | PX13 | 326 |
| 201507 | PX13 | 300 |
| 201601 | PX13 | 325 |
| 201604 | PX13 | 336 |