GTSPP Data Product Centre| Year & Month(yyyymm) | observing line | Number of observations |
|---|---|---|
| 201610 | PX06 | 50 |
| 201706 | PX06 | 64 |
| 201709 | PX06 | 60 |
| 201803 | PX06 | 60 |
| 201807 | PX06 | 80 |
| 201608 | PX09 | 220 |
| 201702 | PX09 | 214 |
| 201704 | PX09 | 205 |
| 201707 | PX09 | 217 |
| 201801 | PX09 | 216 |
| 201808 | PX09 | 232 |
| 201612 | PX13 | 321 |
| 201704 | PX13 | 325 |
| 201711 | PX13 | 311 |
| 201805 | PX13 | 335 |