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Scan pattern change of the Ka-band Precipitation Radar (KaPR)
JAXA and NASA changed the scan pattern of Ka-band precipitation radar (KaPR) on May 21, 2018, after transition to latter phase in operation. Before this scan pattern change, dual-frequency information by Ku- and Ka-band radars could observe precipitation only in a narrow inner swath of 125 km, whereas dual-frequency observation information can be applied in full swath of approximately 255 km after the pattern change. By applying the algorithm corresponding to the scan pattern change, new GPM/DPR product can obtain dual-frequency information in full swath of 255 km.
BEFORE scan pattern change
AFTER scan pattern change
Sample Programs & Data
V07, after the scan pattern change of KaPR
| Method | Materials | Programs | Update Date | |
|---|---|---|---|---|
| 1 | THOR | GPM/TRMM Data reading program guide (THOR version) | - | 2021/12/06 |
| 2 | IDL | GPM/TRMM Data reading program guide (IDL version) | IDL | 2022/02/24 |
| 3 | C language | GPM/TRMM Data reading program guide (C language version) | C language | 2022/02/04 |
| 4 | FORTRAN | GPM/TRMM Data reading program guide (FORTRAN version) | FORTRAN | 2022/02/04 |
| 5 | Python | GPM/TRMM Data reading program guide (Python version) | Python | 2022/02/24 |
Sample Data
V06 or earlier versions, before the scan pattern change of KaPR
| Method | Materials | Programs | Update Date | |
|---|---|---|---|---|
| 1 | THOR | GPM/TRMM Data reading program guide (THOR version) | - | 2019/04/17 |
| 2 | IDL | GPM/TRMM Data reading program guide (IDL version) (Japanese only) | IDL | 2019/03/11 |
| 3 | C language | GPM/TRMM Data reading program guide (C language version) (Japanese only) | C language | 2019/03/08 |
| 4 | FORTRAN | GPM/TRMM Data reading program guide (FORTRAN version) (Japanese only) | FORTRAN | 2019/03/11 |
| 5 | Python | GPM/TRMM Data reading program guide (Python version) (Japanese only) | Python | 2021/12/01 |