JMA will switch operation from its Himawari-8 satellite to its Himawari-9 unit at 05 UTC on 13th December 2022. Himawari-9 carries the same Advanced Himawari Imager (AHI) sensor equipment as Himawari-8, and will conduct observations from the same orbital position (140.7 E) with the same observation sequence.
The switch will be almost seamless, with no data format or data dissemination system changes.

[SATAID file]
The file name and the file format of Himawari-9 SATAID are not changed from Himawari-8. So, users will be able to continue receiving Himawari-9 data with the current settings.
If necessary, users can discriminate Himawari-8 and -9 using header information.

[Atmospheric Motion Vector (AMV)]
The GTS abbreviated headings of Himawari-9 AMV are not changed from Himawari-8.
Satellite ID in the file is changed from 173 (Himawari-8) to 174 (Himawari-9).
Users can discriminate Himawari-8 and -9 using the satellite ID.

[Clear Sky Radiance (CSR)]
The file name and the file format of Himawari-9 CSR are not changed from Himawari-8.
Satellite ID in the file is changed from 173 (Himawari-8) to 174 (Himawari-9) and center wavelength for each band is also changed. Users can discriminate Himawari-8 and -9 using the satellite ID.

As for the performance of Himawari-9 products, please refer to the website of Meteorological Satellite Center of JMA:
https://www.data.jma.go.jp/mscweb/en/oper/switchover.html

If you have any questions about the switch, please contact:
Satellite Program Division - Email: metsat@met.kishou.go.jp