User Account Application of SDAS


It is necessary to submit use application if you would like to use the Solar Data Analysis System (SDAS). Before applying for the account of SDAS, please read the "Rules in Using the Open-use Computer System Operated by the Astronomy Data Center, National Astronomical Observatory of Japan" and the following sentences. When you use the SDAS, this use application is always necessary.

  1. The expiration date of your account is 31 March every year. If you do not carry out the extension procedure, your account is revoked at 1 April. At the time, all files of the account are deleted automatically, and the files cannot be recovered.
  2. When you do not follow the center rule and use the system except for the approved purpose (see. " Rules in Using the Open-use Computer System Operated by the Astronomy Data Center, National Astronomical Observatory of Japan "), we revoke the use qualification. When you rent your account to others and they log in SDAS by the account, we also revoke the use qualification.
  3. If you are the staff or student of a foreign institute, we request a person (introducer) who refers you to SDAS system administrator. The introducer must be a researcher of the institute in Japan. Please write the name and e-mail address of your introducer at the space of the message in the application form. We give you the login account after we confirm your identity by the introducer.
  4. In the application form, we request to input your password for access to SDAS. Simple passwords (ex. 1234, solar, flare, space, taiyo) cannot be accepted, and you cannot use the characters encoded by multibytes (ex. Japanese characters) for your password. If we find such password, we revoke your account immediately without announcement.
  5. We do NOT certificate your data in any sense, e.g. in case of hardware trouble, etc. Please take your back-up by yourself.
  6. To acess the SDAS from Internet, you can use our VPN connection service. When you use the VPN service, you need to follow "Bylaw on the VPN service".
  7. The users should acknowledge the usage of our system when you write a paper by using th resource of SDAS. Please see the page "Instruction for SDAS Users".


  • We need 3 ~ 4 business days for making your account. When the confirmation of your identity by the introducer takes long time, the process of making your account will be delayed.

User Application Form of SDAS