导航|地址|刷新
Meteorological Satellites -Japan Meteoro…



Meteorological Satellites -Japan Meteorological Agency (JMA)-






HOME

Services

Meteorological Satellites

NMHSs

Himawari JDDS


Himawari JDDS

Himawari-8/9 imagery and geophysical products are provided via the JMA Data Dissemination System (JDDS). Satellite imagery and products such as High-resolution Cloud Analysis Information (HCAI) are provided via the Himawari JDDS.

Data access without registration

The JPEG satellite imagery listed in Table 1 is freely available without the need for registration.


Table 1 Himawari-8/9 JPEG imagery

Area Name	Time Interval
Full disk (FD)	Every 60 minutes
North Central	Every 30 minutes
Northwest	Every 30 minutes
Northeast	Every 30 minutes
Sout Central	Every 30 minutes
Southwest	Every 30 minutes
Southeast	Every 30 minutes
East Asia	Every 30 minutes
North Japan	Every 30 minutes
Southwest Japan	Every 30 minutes

Data for National Meteorological and Hydrological Services

National Meteorological and Hydrological Services (NMHSs) can access the following satellite imagery and products via HTTPS after registration:

High-resolution Cloud Analysis Information (HCAI)

AMV-based Sea-surface Wind data (ASWinds)

Satellite imagery in HRIT format

High-resolution Cloud Analysis Information (HCAI)

High-resolution Cloud Analysis Information consists of data on cloud mask (including dust mask), snow mask, cloud type, cloud top height and quality control. Each element has a spatial resolution of 0.02 degrees in both latitude and longitude, and is calculated using observational data from Himawari-8 or -9. The region of HCAI coverage is as detailed in Table 2 and Figure 1 below.


Table 2 HCAI regions and file sizes

Area Name	Latitude	Longititude	File size / 10 min.	Compressed file size / 10min.
FD	Full Domain	60N-60S	80E-160W	180 MB	29.5 MB
NC	North Central	45N-20S	90E-155E	50 MB	10 MB
NW	Northwest	60N-5S	80E-145E	50 MB	10 MB
TP	Tropical	25N-25S	80E-160W	75 MB	15 MB
TE	Tropical East	25N-25S	135E-160W	40 MB	7.5 MB
SE	Southeast	5N-60S	135E-160W	50 MB	10 MB

Figure 1 High-resolution Cloud Analysis Information (HCAI) regions

AMV-based Sea-surface Wind data (ASWinds)

AMV-based Sea-surface Wind data (ASWinds) is an ocean-surface wind product involving wind speed estimation from the strong correlation between low-level AMVs, which are assigned to the lower troposphere, and sea-surface winds around tropical cyclones. It provides valuable information on wind distribution around tropical cyclones over ocean areas, where observation data are particularly sparse, using low-level AMVs derived from Himawari-8 full-disk and target-area imagery. In combination with JMA’s HimawariRequest service for tropical cyclone observation, the ASWinds product derived from target-area observation is expected to significantly contribute to tropical cyclone monitoring. The AMV-based Sea-surface Wind data are shown in Table 3.


Table 3 AMV-based Sea surface Wind data (ASWinds)

Area Name	Latitude	Longitude	File size	Interval	Spatial resolution
FD	Full Domain	65N-65S	80E-160W	1 MB	30 min	0.25 deg
TG	Target Area	1,000 km x 1,000 km	200 KB	10 min	0.1 deg

Himawari-8/9 ASWinds were validated for areas around TCs occurring in 2016 based on comparison with ASCAT winds. The root mean square difference of the wind speed was 1.4 to 1.7 m/s. The following document provides details of product validation and other information:
Utilization of Estimated Sea Surface Winds using Himawari-8/9 Low-level AMVs for Tropical Cyclone Analysis, Technical Review No. 21 (March 2019), RSMC Tokyo – Typhoon Center
Although the accuracy of ASWinds data around tropical cyclones has been verified, it is important to understand that their reliability for other regions, such as around extratropical cyclones, remains unverified.

Satellite imagery in HRIT format

JMA provides Himawari-8/9 data in the format prescribed by HRIT regulations. These data are intended to support users of the previous operational MTSAT series as an interim measure until preparations are complete for the reception of Himawari-8/9 data via HimawariCloud or HimawariCast. The details of Himawari-8/9 imagery in HRIT format are shown in Table 4.


Table 4 Himawari-8/9 imagery in HRIT

Format	Product area	Interval	Notes
HRIT	Full disk	Every 30 minutes	Bands: 5 (VIS: 1; IR: 4) Spatial resolution: VIS: 1 km; IR: 4 km Northern/southern disk division Archived in tar and compressed gzip format

Terms and conditions

JMA provides Himawari JDDS accounts to National Meteorological and Hydrological Services (NMHSs). Before using the service, users must submit fully completed and signed registration forms in scanned PDF format.
Himawari JDDS Registration Form (Microsoft Word File)
Once registration is complete, JMA will provide a user ID, password and dedicated URL. Users access data via an HTTPS client such as a Web browser or Wget.

Extremely heavy access impairing the download activities of other users may be recognized as a cyber-attack. Accordingly, users are asked to comply with the guidelines provided below to avoid having access terminated without notice.

Refrain from downloading the same files repeatedly except in the event of a failed download.

Refrain from downloading the same files with a different client.

Contact details for issues and inquiries:

Satellite Program Division, Japan Meteorological Agency

E-mail: metsat AT met.kishou.go.jp





Satellite Program Division, Japan Meteorological Agency
E-mail: metsat AT met.kishou.go.jp

<Legal Notice>




------
导航页 打开网址