For NMHSs only
JMA provides HimawariCloud accounts to National Meteorological and Hydrological Services (NMHSs) in the Himawari-8/9 coverage area.
JDDS landline service intends to support users of former operational MTSAT series as an interim measure until users become ready to receive Himawari-8 imagery via HimawariCloud or HimawariCast. Himawari-8 imagery distributed via JDDS is described in Table 1.
|HRIT||Full disk||Every 30 minutes||
|JPEG||Full disk||Every hour||
(cut out from full disk)
|Every 30 minutes|
Detailed information on the transition from MTSAT-2 to Himawari-8 is given below. Current JDDS users should note the details carefully.
1. Transition schedule
With the start of Himawari-8’s operation on 7 July 2015, JMA began parallel distribution of satellite data via JDDS as shown in Table 2 to support user readiness for Himawari-8.
(17 June 2015 –)
(7 July 2015 –)
(March 2016 –)
Commencement of parallel distribution for MTSAT-2 and Himawari-8 imagery in HRIT and JPEG format (17 June 2015)
Termination of MTSAT-2 imagery (JPEG) distribution at 02 UTC coinciding with the start of Himawari-8’s period of operational service (7 July 2015)
Termination of MTSAT-2 imagery (HRIT) distribution (March 2016)
2. Differences in parallel distribution
The specifications of Himawari-8 HRIT and JPEG files are similar to those of their MTSAT-2 counterparts. The slight differences are shown in the table below.
|Distribution frequency||48/day (northern half disk)
32/day (southern half disk)
|48/day (Northern half disk)
48/day (Southern half disk)
|File name (mmss)||“mmss” represents the exact observation start time.||“mmss” is set to “5000” or “2000” to represent the observation start time.|
|Distribution frequency||24/day (full disk)
|24/day (full disk)
|File name (mmss)||“mmss” represents the exact observation start time.||“mmss” is set to “0000” or “3000” to represent the observation end time.|
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