FAQ

DIAS accounts are keyed to email addresses, so it is impossible to change them for systematic reasons.
If you would like to change your e-mail address, you have to register again with a new e-mail address.
https://auth.diasjp.net/account/public/en/guest/

After registering a new DIAS account and confirming your login, please delete your old account after logging in with your former one(*Note).

Note: In the following cases, it is necessary to change the linkage from the old account to the new account. Please inform the DIAS Secretariat Support Desk ( dias-office[at]diasjp.net ) without deleting the old one. ([at]→@)

• – You are using a data set for which a license application is required, and you have received permission to use it.
• – You are in the process of inputting metadata to data for which your data registration has been accepted, or has already been published.
• – You are using the DIAS analysis environment.

(See next page for deletion method.)

Please log in with the DIAS account you would like to deactivate and proceed to the “Edit Profile” screen below to delete the account (*Note).

https://auth.diasjp.net/account/public/en/profile

*Note: If any of the following apply to you, please notify DIAS Secretariat Support Desk ( dias-office[at]diasjp.net ) before deleting your account. ([at]→@)

• – You are using a data set for which a license application is required, and you have received permission to use the data set.
• – You are in the process of entering metadata to data for accepted data registration, or the data has already been published.
• – You are using the core system.

The DIAS analysis environment is available in the joint research. For more information on joint research, please refer to the following page (written in Japanese),
https://diasjp.net/joint-research/

Registration for a “DIAS account” is required to use the data.
You can apply for a new DIAS account at the following URL.
https://auth.diasjp.net/account/public/en/guest

Before applying, please carefully check the “DIAS Terms of Service” and “DIAS Privacy Policy”.

Some of the dataset you can download after LOGIN when you demand, you have to get permission to use by sending the application form beforehand. Please refer to the metadata page of each dataset for details. (See FAQ for XRAIN and Himawari below)

Please register for a “DIAS account” first.

https://auth.diasjp.net/account/public/en/guest

To use the MLIT XRAIN dataset, you have to get permission from the data provider by sending the application form in the following page.

https://data.diasjp.net/dl/storages/filelist/dataset:242/lang:en

Please include all the information in the “Notes” section of the application form. If not, your application will not be accepted.

You will be notified of the granting or denial of permission by e-mail.
Please be aware that it may take several days for a response. If your application is denied for any reason, please follow the comments and reapply.

Please register for a “DIAS account” first.

https://auth.diasjp.net/account/public/en/guest

To use the JMA Himawari 8, 9 dataset, you have to get permission from the data provider by sending the application form in the following page.

https://data.diasjp.net/dl/storages/filelist/dataset:245/lang:en

Please include all the information in the “Notes” section of the application form. If not, your application will not be accepted.

You will be notified of the granting or denial of permission by e-mail.
Please be aware that it may take several days for a response. If your application is denied for any reason, please follow the comments and reapply.

No, it is not possible. You can use the data the DIAS prepared.

No. However, using the "XRAIN real-time rainfall information and download system," you can download the XRAIN in four formats: plain binary, CSV, and GrADS binary with the control file set (in tar.gz or zip compression).

It is a file format called netCDF, which is widely used in fields such as climate and meteorological research. Using scripting languages such as Python or tools such as GrADS and CDO, you can visualize it or convert it to other formats, such as CSV.

Those are file formats used by the analysis and visualization tool GrADS.
GrADS uses two file types: .ctl and .dat. The .dat file is the actual data in a plain binary format, and the .ctl file is a text file called a 'control file' that explains the data in the .dat file.
You can process and visualize the data by placing the corresponding .ctl and .dat files in the same folder (directory) and loading the .ctl file from GrADS.

If you wish to publish data on DIAS, please see the ‘Data Publication from DIAS’ page and the ‘Procedures for Data Publication’ page.

If you wishes to assign a DOI, DIAS will carry out the procedures for assigning a data DOI.

The "Online Resource" section on the metadata page of the JRA-55 contains links to the "JRA-55 Product Users Handbook" and other documents.

For more detailed information than in the handbook, please contact the address in the "Contact Us" section on the JRA-55 homepage.

DIAS has introduced the "Mahalo Button," a service that shares information on how much research data is used.

Clicking "mahalo!" will display a list of papers that use the data.

For more information, please refer to the "About the Mahalo Button" page.

Papers using data are displayed using the "Mahalo Button" service.

If you click on the "mahalo!" button displayed on the metadata page, you will see papers that use data obtained from DIAS. In addition, the results of using DIAS are published in the "DIAS Research Results List."

The DIAS top page ( https://diasjp.net ) is free to link to (no permission or reporting is required).

However, please link to the top page in general.

If you would like to link to a page other than the top page, please contact the DIAS Secretariat.

Please check the following if you cannot access the data download page.

• Some data require permission. For details, please see the "Search and download datasets" page or each metadata page.
• If the permission period for a dataset that requires permission has expired, it cannot be downloaded. Please apply again.
• DIAS service may be temporarily unavailable. Please check the "operation" category in the information section.

If you cannot download data using the download script, please contact the DIAS Secretariat with the following information;

• Information about the dataset you are trying to download (information identifying the target data, such as dataset name, directory, etc.),
• The results of your download attempt (only some files were extracted, the files were 0 bytes, etc.),
• Information about the script you use (whether it has been modified, specific modification information if so),
• Command line options you gave the script when you ran it,
• Output messages (message text or screenshots).

There are no explicit download restrictions on the DIAS side and no restrictions at specific times. Since the bandwidth is limited, if multiple downloads are concentrated, transmission may slow down, and the session may be terminated. If the problem persists after trying the above, please contact the DIAS office with the specific situation.

• Reduce the number of files downloaded at once
• If you are accessing from multiple terminals simultaneously, try accessing from a single terminal

Are you using a function that automatically converts URLs to secure ones as part of your email system's secure settings? For example, we have confirmed that in cases where URLs in emails are rewritten to include domain names such as "sakelinks" or "urldefense", it may not be possible to access DIAS correctly.
As we cannot treat that situation, please consider setting your email system so as not to restrict connections to DIAS (the *.diasjp.net domain) or access the site by guessing and extracting the original URL part from the rewritten URL. If you contact the DIAS Secretariat, it may be possible to confirm the original URL.

Please contact the DIAS Secretariat Support Desk ( dias-office[at]diasjp.net ) with the following information; ([at]→＠）
・Name of the dataset (directory)
・Information of the missing part (e.g., date, etc.)
NOTE: Some data cannot be restored due to the circumstances of the data providers.

Please check the following conditions:

• -There is the data that requires a usage license. For details, please refer to “User Guide” and the metadata page of each dataset.
• -In case a dataset requires a license, you will not be able to download it if the usage deadline has expired. Please apply it again.
• -DIAS may be suspended for an irregular period. Please check the “News” to see whether you are currently in that period or not.

If you are unable to download the data using the download script, please contact the DIAS Secretariat Support Desk ( dias-office[at]diasjp.net ) with the following information to the best of your knowledge.([at]→@)

• -Information on the data set you are trying to download
  (e.g. Data set name, directory, and other information that identifies the target data)
• -Result of the download experiment
  (e.g. Only some files were extracted, files are 0 bytes, etc.)
• -Information on downloaded scripts.
  (e.g. Whether or not there is a change. (If you have made changes, please give us specific information)
• -Command-line options are given to the script at runtime.
• -Output messages (e.g. message text or screenshots)

There is no explicit limitation on the DIAS side.
We don’t put any periodic network load to DIAS systems.

Because of limited bandwidth, a high concentration of multiple downloads may cause a delay in the transfer, resulting in a loss of session time.

Please try them below:

• -Reduce the number of files downloaded at one time.
• -If you are accessing multiple terminals at the same time, use only one terminal.

If the problem isn’t solved after trying, please contact the DIAS Secretariat Support Desk ( dias-office[at]diasjp.net ) with the specific situation. ([at]→@)