The objective of this page is to provide information to research scientists desiring to benefit from observation time with the THEMIS Solar telescope. Observation campaigns generally range from April to October.

Interested user are encouraged to check the latest information on available THEMIS instrumentation and observing capacities, as well as the available data products.

Interested researchers are also encouraged to contact the THEMIS staff – in particular email themis.team@themis.iac.es – directly to obtain more specific information or express their needs.

* **[[observation:2026campaign | 2026 observing campaign]]:**  
  /* [[observation:2025campaign#2025 campaign schedule]] */
  * Call for 2026 observing campaign (open)
  * 75 days campaign - September to mid-november  
* 2025 observing campaign : [[observation:2025campaign#2025 campaign schedule]] ; [[observation:2025campaign#Call for observation time during the 2025 campaign (closed)]] \\  
* 2024 observing campaign :  [[Observation:2024Campaing| 2024 Campaign schedule]] ; [[call24:2024_call_for_observing_time| Call for 2024 observing campaign]]  (closed)\\   
* 2023 observing campaign :  [[Observation:2023Campaing| 2023 Campaign schedule]] ; [[call23:2023_call_for_observing_time| Call for 2023 observing campaign]]  (closed) \\
* [[Observation:PreviousCampaign| Previous observing campaigns ]]

Applicants can find hereafter general rules about access and procedure to obtain observation time. Specific details can change from one year to the other. Interested researchers shall also check the calls of previous observation campaign.

Use of the THEMIS telescope is granted by rights to the French and Spanish communities, but also to the international community through the CCI-ITP time allocation procedures: The International Scientific Committee (CCI) of the Instituto de Astrofisica de Canarias (IAC), overseeing the Canary islands telescopes, awards observing time through its International Time Program (ITP).

The available time ratio and application procedure is specific to each category of user:

• Applicants to “French time”: ~75% time of the campaign. Proposal for the French time are allocated by the THEMIS TAC. Applicants shall complete a specific proposal form and email it to the THEMIS director. Please note that French users must take care of their travel and subsistence expenses.
• Applicants to “Spanish time”: ~20% time of the campaign. Proposal for the Spanish time are allocated by the Spanish TAC. Applicants should follow the instructions of the IAC solar CAT proposal system.
• Applicants to the “CCI time Solar ITP”: ~5% time of the total. Proposals for ITP time are allocated by the ITP-TAC.

Safety rules and PRL guidelines for the visiting observers
How to reach THEMIS locations
How to contact THEMIS Staff
Weather at THEMIS location and weather forecasts
Room and meal reservation webpage of Teide Observatoru/IAC