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PLEASE READ CAREFULLY BEFORE APPLYING: The GRASP Summer School is free for everyone who wishes to register and can attend in person. Due to the high volume of applications we receive, once your registration form has been submitted, we will confirm in the following days whether you have been selected to participate in this edition of the GRASP Summer School in Valladolid.

The GRASP Summer School 2026 is organized for its third edition in the city of Valladolid (Spain) from June 29th to 30th 2026, within the framework of the MSCA Staff Exchange funded project GRASP-SYNERGY.

This event provides intensive training on the Generalized Retrieval of Atmosphere and Surface Properties (GRASP), which is the first unified algorithm developed for characterizing atmospheric properties from a wide variety of remote sensing observations and the synergy of them. The program is structured to combine theoretical overviews with hands-on practical applications:

The first day focuses on the GRASP concept and overview, led by Oleg Dubovik and David Fuertes:

  • Technical sessions cover the forward model overview and numerical inversion techniques.

  • Hands-on practical sessions include running the GRASP forward model and understanding software settings.

  • Specific software overviews and cloud-based applications are demonstrated by the technical team.

  • A dedicated use case on sun-photometers concludes the first day.

The second day explores diverse applications and instrument synergy, led by multiple GRASP fellows:

  • Presentations cover various applications in GRASP and the synergy between sun-photometers and lidar.

  • Practical workshops focus on data preparation for lidar and nephelometer data.

  • Specialized lectures address error estimates and satellite-based observations.

  • The school concludes with hands-on training for multi-instrument space observations and satellite applications.

Participants are encouraged to visit the GRASP-OPEN website to explore products and documentation to learn more about the algorithm and its scientific applications prior to the event.

Download the Agenda

Introduction / Overviews
– Welcome (David Fuertes)
– Introduction: GRASP concept and overview (Oleg Dubovik)
– The different applications in GRASP (Anton Lopatin)

Forward Modeling
– Forward model Overview (Masahiro Momoi)

Introduction to numerical inversion
– Overview in the Numerical inversion (Oleg Dubovik)
– Error Estimates (Milagros Herrera)

Practical exercises
– Hands-on: GRASP software overview (Juan Carlos Antuña/David Fuertes/Christian Matar)
– Hands-on: Running GRASP forward model (Marcos Herreras/ Anton Lopatin/ Milagros Herrera)
– Hands-on: Setting understandings (Marcos Herreras/ Anton Lopatin/ Milagros Herrera)
– Use Case: Sun-Sky-Moon Photometer (Masahiro Momoi)
– Hands-on: Running GRASP in the cloud (Marcos Herreras/ Anton Lopatin/ Milagros Herrera)
– Use Case: Synergy Sun-Sky-Moon Photometer + Lidar (Masahiro Momoi)
– Hands-on: Data preparation for Lidar data (Anton Lopatin)
– Use Case: Integrating Nephelometer (Chong Li)
– Hands-on: Integrating Nephelometer (Chong Li / Fernando Rejano)
– Hands-on: GRASP- inversion of multi-instrument space observation (Marcos Herreras)
– Use Case: Satellite Applications (Anton Lopatin)

The Parque Científico Universidad de Valladolid (PCUVa) was established as a strategic initiative to transform academic excellence into a driving force for regional innovation and economic growth. Acting as a fundamental pillar within the University of Valladolid, its general aim is to promote scientific and technological knowledge while fostering development and innovation across diverse disciplines. By providing a professional bridge between researchers and the industrial sector, the Park facilitates the transfer of R&D results to public administrations as well as to private organizations and businesses, ensuring that university-led discoveries contribute directly to socio-economic progress.

The Park was founded with the vision of integrating the University’s intellectual capital into the regional knowledge system, encouraging deep interaction between various social and economic agents. It is dedicated to undertaking quality research and promoting the creation of technology-based firms and spin-offs, committing itself to the modernization of human resources and the provision of advanced tools for entrepreneurship. Through its specialized consultancy and support services, it empowers the university community to transform complex ideas into viable market solutions, reinforcing its role as a catalyst for a more competitive and innovative production sector.

At present, the PCUVa possesses a solid infrastructure of excellent research units and innovation teams with extensive experience in national and international projects. It offers a sophisticated network of laboratories, incubation spaces, and high-tech equipment across its various campuses, with strategic plans for expansion in the immediate future to accommodate the growing needs of the scientific community and its corporate partners.

 

Address of the venue: Edificio I+D, Paseo de Belén 11, 47011, Valladolid.

Getting to Valladolid

Flying to Madrid-Barajas Airport (MAD)

Madrid-Barajas is the most convenient international gateway to Valladolid. From the airport, you have two primary options to reach the city:

High-Speed Train (AVE/ALVIA)

This is the fastest and most recommended option.

  • From the Airport: Take the Cercanías train (Line C-1 or C-10) from Terminal T4 to Madrid-Chamartín station (approx. 15-20 min).

  • From Chamartín to Valladolid: Take a high-speed train (AVE, ALVIA, or AVANT) to Valladolid-Campo Grande station. The journey takes between 60 and 70 minutes.

  • Tickets: It is highly recommended to book in advance via Renfe.

Bus (ALSA)

There are direct buses from Madrid-Barajas (Terminal T4) to the Valladolid bus station.

  • Duration: Approximately 2.5 to 3 hours.

  • Cost: Between 15€ and 25€.

  • Tickets: Can be bought online via.

Getting to PCUVa

The Science Park is located at Campus Miguel Delibes, in the northern part of the city.

Local Bus (AUVASA)

Valladolid has an efficient local bus network. To get to the Science Park (Campus Miguel Delibes) from the city centre or the train station:

  • Lines 8, U1, and U8: These lines stop directly within the Campus.

  • Lines 1 and 2: These stop nearby (Paseo de Belén) and are very frequent.

  • Price: 1.50€ (paid on board with cash/contactless) or via the AUVASA app.

Taxi

A taxi from the train station or city centre to Edificio Lucía takes about 10-15 minutes and costs approximately 8-12€. You can use the Pidetaxi app or call (+34) 983 291 411.

Walking/Bike

If you are staying near the University’s historic centre (Plaza de la Universidad), the venue is a pleasant 25-30 minute walk / 10 min by bike through the university district.

Address of the venue: Edificio Lucía, Paseo de Belén 11, 47011, Valladolid.

An icebreaker will take place on Sunday, June 28th – the information about the place will be shared amongst the participants.

WITH THE SUPPORT OF