Transnational Access and Service Programme (TAS)

1st Call for proposals - for Piz Daint supercomputer  

Allocation Period: 1 year (starting from Jan 1, 2020)
Effective Date: Aug 26, 2019
Expiration Date: Oct 24, 2019

Call for proposals - Solar telescopes GREGOR and VTT closed

Period: 2019B (Aug 12 – Nov 30)
Effective Date: May 15, 2019
Expiration Date: June 2, 2019

Call for proposals - Solar telescopes SST and THEMIS closed 

Period: 2020A (for SST and THEMIS)
Expiration Date:
Jan 20, 2020

Call for proposals - Solar telescopes GREGOR and VTT closed

Period: 2020A (20th May to August 2020, for GREGOR and VTT)
Expiration Date:
April 19, 2020

2nd Call for Proposals - for Piz Diant Supercomputer


Allocation Period: 1 year (starting from Jan 1, 2021)
Effective Date: April 15, 2020
Expiration Date: Oct 05, 2020

Note: Deadline for preliminary proposal submission is May 31st, 2020 (refer to call for more details)

Call for proposals 2020B - Solar telescopes GREGOR and VTT 

Period: 2020B (15 Oct - 30 Nov) 
Expiration Date:
September 19, 2020

(Remote observation possible for GREGOR) 

Call for Proposals 2021A - for GREGOR, SST and THEMIS


Period: 2021A  
Effective Date: Dec 14, 2020
Expiration Date: January 25, 2021 

(Remote observation possible for GREGOR) 
3rd Call for proposals - for Piz Daint supercomputer  

Allocation Period: 1 year (starting from Jan 1, 2022)
Effective Date: April 15, 2021
Expiration Date: Sept 30, 2021
Preliminary proposal submission deadline: May 31, 2021

Call for Proposals 2021B - for GREGOR


Period: 2021B  
Effective Date: April 30, 2021
Expiration Date: May 24, 2021 

(In case of restricted travel to Tenerife, travel to Freiburg & remote observation from Freiburg possible for GREGOR) 

Access to the following solar telescopes and database repositories will be available for external users:

  1. The first-class EU infrastructures for high-resolution ground-based solar physics: GREGOR, VTT, THEMIS, SST
  2. The most demanded European Science Data Centre, providing data gathered by the solar satellite HINODE (SDC Europe), Solar Dynamics Observatory (BE-WISSDOM), Stockholm SST Archive, IBIS Data Archive (IBIS-A), GRIS Data Archive and German Science Centre for the Solar Dynamics Observatory (GSC-SDO)
  4. Piz Daint Supercomputer

New users, young researchers and eligible researchers from countries with no similar facilities are especially encouraged to apply for access. Please check TAS Eligibility Criteria. [Insert]

Work Package 9 (WP9): Transnational Access Programme

The aim of this WP is to offer to external users access to the most-advanced, high-resolution ground-based solar telescopes installed at the Canary Islands Observatories (GREGOR, VTT, THEMIS, and SST) and other associated first-class infrastructures in solar physics.

How to apply for access
SOLARNET will publish a half-yearly call for proposals. The decision of time allocation will be made by the European Association for Solar Telescopes Time Allocation Committee (EAST TAC) based on the scientific ranking by external referees with some preference (tie-breaking) given to new users. The selected PI’s is recommended to send at least two observers for each campaign, the length of which will typically be around 10 days. The observers’ costs for travel and subsistence for a maximum of two members per research team will be supported under this WP and administrated by the Coordinator (KIS). An exception is the limited amount of service-mode observing time being offered by SST (up to 5 days per year). Here the PI’s and Co-I’s stay at their home institute while SST staff does the observing.

SUNRISE 3 is one single balloon mission with a flight duration of a few days. There will be a separate call for proposals for the mission and the EAST TAC will award time. The Access unit is hours.

The Piz Daint supercomputer uses node hours as the unit of access. The computer time will be distributed in blocks of 125000 node-hours each.

Application form
Astronomers are invited to apply for access at SOLARNET ACCESS in 2019: Call for proposals.
Each telescope (GREGOR, VTT, THEMIS, SST) have a specific form for the proposals.
Prior to submitting your application make sure you and your team meet TAS Eligibility Criteria. [Insert]
All proposals should be sent via email to
Deadline: January 20th, 2019.

Travel and Subsistence Grants
Apart from awarding telescope time (following the Announcement of Opportunity, and based on scientific merits and technical feasibility) and access to databases, Travel and Subsistence Grants will be provided to be on-site during the observations.


Work Package 10 (WP10): Access to Science Data Centres. Space missions

Access to the most demanded European Science Data Centres, providing data gathered by the solar satellites HINODE, IRIS, and the Solar Dynamics Observatory (SDO), will be offered as well as ground-based data from GREGOR, IBIS, and SST (not previously offered through EC funding). A novelty in this project is the addition of access to numerical simulations, including synthetic observables, to enable close collaboration between observations and theory.  This access to data for solar research will expand significantly the content of the Programmes for the high-resolution solar physics community supported in the past.

Access to the database repositories is freely provided through the internet connection.

Travel and Subsistence Grants
Observing teams awarded with telescope time under the SOLARNET TAS Programme receive free access to the telescope as well as scientific and technical support to carry out the observations. EC funds are also available to cover travel, accommodation and subsistence costs during the observing run. A maximum of two members from the research team can be supported. We encourage group leaders to involve new users and/or young researchers as beneficiaries for, at least, one of the travels and subsistence grants available. In any case, it is the responsibility of the group leader to decide which member of the team will be supported.
In the event the proposed beneficiary for these grants was not included in the original proposal (i.e. new Ph.D. students, etc), the group leader will be requested to justify it. Please, make sure that the inclusion of new members does not turn your team into not eligible, according to EC rules. Once the group leader has received the official confirmation of telescope time awarded, he/she is invited to ask those team members who will benefit from these travel and subsistence grants to complete the following application form. [Insert]

Travel and Subsistence Application Form (Please click here to download)

  • Users are advised not to make any bookings/reservations if they want to take advantage of this funding opportunity. Following your preferences, The SOLARNET Project Office will book and directly pay for all your travel tickets and accommodation costs once your proposal has been accepted and the grant had been confirmed.
  • Once the schedule has been finalized, the users should contact SOLARNET‐office@leibniz‐ as soon as possible with the completed form, at least 8 weeks before traveling so that all formalities can be completed.
  • Travel applications received 8 weeks before the observing run will be considered.
  • We kindly ask you to read first the information related to Allowable Costs.

Allowable Costs
As a general rule, a maximum of two members from the research team awarded with telescope time can be supported with travel and subsistence grants. New users and/or young researchers are especially welcome to this funding opportunity. The group leader will receive by e-mail detailed information about the procedure to apply for these travel and subsistence grants. It is the responsibility of the group leader to decide which member of the user group will be supported.
The SOLARNET Project Office will directly pay travel and accommodation costs. Team members will be contacted to follow their preferences.

TRAVEL EXPENSES: Travel costs are either (a) the cheapest economy class airfare from the researchers' place of work to the observatory, or (b) the actual cost of travel, whichever is more economical. Train tickets can be also covered if needed. The following cannot be considered as allowable costs: private car costs, Rental cars (apart from the rental car at the Observatory), local travels in the city or locality of your home institution or any other travel costs not mentioned above.

ACCOMMODATION AND SUBSISTENCE: Accommodation and Subsistence costs for the entire duration of the observing run (plus a minimum number of nights really necessary), including food and lodging, but excluding telephone calls, laundry and any other extras, are eligible. Users are invited to book at OT/ORM Residence. The SOLARNET Project Office will inform staff at the Residences about this funding support, so users will not be invoiced at their departure. Additional nights at sea-level or at the country of origin, when really necessary, such as in case of early morning flights, will be either refunded or directly paid by the SOLARNET Project Office. Other accommodation costs (additional nights on-site or sea-level or at the country of origin) will not be refunded. For private holidays, the users should book their own hotels. If additional flight costs are incurred due to private holidays, then the users are expected to take care of the additional flight costs.

RENTAL CAR: A car will be available at your arrival at the Canary Islands (Tenerife or La Palma airports). The SOLARNET Project Office will inform you about the Rental Car Agency to pick up the vehicle. The use of this car will be restricted to the ascent and descent from the Observatory as well as inside the Observatory. The vehicle will be provided with a full tank and may be returned to the agency at your departure without refueling. It has been estimated that one full tank is more than enough for expected journeys during your observing period. It is necessary to have a driver's license in force, which will be required by the Agency's staff. They will inform you about the rights, obligations, and responsibilities. Any additional or improper use of this vehicle, or failure to comply with current traffic regulations, will be your own responsibility. In case you have not drivers' license in force, or you prefer not to take the rental car, taxi service from the airport to the Observatory and return will be covered. This service will be also booked and paid by the SOLARNET Project Office (inform us well in advance). Both members of the observing team supported by these travel and subsistence grants are expected to share the rental car or the taxi option. This support cannot be offered individually.

TAS Eligibility Criteria

To apply for access to the telescopes and instruments offered by SOLARNET, a user group must satisfy the following conditions:

a. The user group leader and the majority of the users must work in a country other than the country(ies) where the installation is located i.e. the legal entity(ies) operating the infrastructure is(are) established.

This rule does not apply:
- if access is provided by an International organization, the Joint Research Centre (JRC), an ERIC or similar legal entities.
- in case of remote access to a set of installations located in different countries offering the same type of service.

b. Access for user groups where the user group leader and the majority of the users work in an institution established in an EU Member State1 or in an Associated State2 is currently limited to 80% of the total amount of units of access.

c. Access for user groups with a majority of users not working in an EU or associated country is limited to 20% of the total amount of units of access provided under the grant unless a higher percentage is foreseen.

d. User groups requesting access are required to apply following the conditions and deadlines of the Announcements of Opportunity yearly published by SOLARNET.

e. Only user groups that are allowed to disseminate the results they have generated under the action may benefit from the access unless the users are working for SMEs.

The selection will be based on scientific merits and technical feasibility. Specially targeted groups (new users, users from countries with no similar facilities, etc.) will be prioritized under equally scored proposals.

Telescopes and EU countries excluded by aforementioned (a) and (b) conditions
THEMIS: France and Spain
VVT: Germany and Spain
SST: Sweden and Spain
GREGOR: Germany and Spain

In the case of databases offered by SOLARNET, access is internet-based and completely open. Researchers worldwide are welcome.

1. EU 28 Member States

2. EU Horizon2020 Associated States: Iceland, Norway, Albania, Bosnia and Herzegovina, the former Yugoslav Republic of Macedonia, Montenegro, Serbia, Turkey, Israel, Moldova, Switzerland, Faroe Islands, Ukraine, Tunisia, Georgia, Armenia.

Feedback form
Users are requested to submit the online feedback form after their observing campaigns.
TAS User Feedback Form