2 job offers are available!

November 2021


Transvalor is recruiting 2 talents for SoDa activities:

Please apply by email.


launch of pareo european project for photosynthetically active radiation

July 2021

July 8th, 2021 was the kick-off of the PAREO European project, standing for Photosynthetically Active Radiation and Earth Observation, for the distribution of Photosynthetically Active Radiation data for agriculture, horticulture, viticulture, and monitoring of microorganisms and algae blooms.
The Finnish Meteorological Institute, the O.I.E. Research Center from MinesParisTech, Transvalor, and Weatherquest are very pleased to take part in this project. This action has been funded by the project "Copernicus / FPCUP" of the European Union" and fits into the context of "Connect by CNES".
Many actions will be carried out within the framework of this project to derive several downstream services providing Photosynthetically Active Radiation (PAR) data.
The purpose is to go beyond the delivery of the most adequate innovative services, but also to generate other opportunities for businesses by stimulating SMEs and start-ups in providing sustainable value-added services for their own panel of users, in Europe as well as outside Europe.


June 2021


SoDa team is very happy to participate at Agrivoltaics 2021, June 14-16.

The conference will provide opportunities for high-level scientific exchange and networking for researchers, companies, associations, and experts from the solar energy and agriculture sectors.
During the poster session on June 14 at 5:30 pm, Ms. Marion LINCK will present services provided by SoDa:
Dr. Claire THOMAS will present Photosyntetically Active Radiation, Global Horizontal Irradiation, and Temperature anomalies and variabilities maps for Agrivoltaics Systems.
They both will be available during this time to introduce the data services that can facilitate the decision-making for the sizing as well as for the production monitoring of agrivoltaic systems.
SoDa products and services are developed in partnership between the research center O.I.E. of MinesParisTech, and Transvalor S.A.


May 2021



The Copernicus Atmosphere Monitoring Service (CAMS), in collaboration with the Ministère de l'enseignement supérieur, de la recherche et de l'innovation, the Ministère de la Transition écologique, Ineris - Institut national de l'environnement industriel et des risques and METEO FRANCE is planning a workshop for users of CAMS (and C3S) products in France on 30 June 2021 (09:30 – 12:30 and 14:00 – 17:00 CEST).

This workshop will discuss plans for the new CAMS CO2 Service, experiences with CAMS solar radiation products and use of CAMS services for air quality, emission reporting, pollen, COVID-19 impacts and health.

As part of this workshop, SoDa will present CAMS solar radiation service, HelioClim business for large user community, and CAMS radiation data use for agriculture.


The meeting will be held in French (with a few talks in English) as a virtual workshop.

typical meteorological year for power plant sizing software

April 2021

TMY is a synthetic year of solar and meteorological parameters representative of a weather pattern.
It is created using many time series of data and contains the median, optimistic and pessimistic scenarios with the use of standard deviations.
The TMY is used in monitoring software such as PVSyst and SAM to estimate the production potential of photovoltaic and wind power plant projects.

SoDa delivers Typical Meteorological Year on-demand.

ground ALBEDO time series available for free on-demand

April 2021


The albedo data describes the capacity of the ground to reflect the sunlight. It is valued for the calculation of reflected direct and diffuse solar radiation that can reach tilted solar panels.
The albedo service provides free access to worldwide albedo maps derived from MODIS, using NASA satellites.
Also, SoDa team can deliver on-demand MODIS albedo time series over the location of your choice.

9th annual solar training will take place virtually in january and february 2021

November 2020


Due to the sanitary circumstances, we decided to virtually hold the 9th solar training.

release of solar radiation book by prof. lucien wald, founder of the SoDa portal

October 2020

We would like to congratulate Prof. Lucien Wald for publishing a book providing very complete information about solar radiation.
This excellent book is relevant to read for any person interested and involved in the solar domain.
Lucien dedicated his research to meteorology, solar radiation, remote sensing, and image processing.
He is the creator of the method to estimate solar radiation data from satellite imagery and is the founder of the HelioClim solar radiation database.
He inspired the creation of the SoDa solar and meteorological services portal.

participation to agrivoltaics 2020 online 14-16 october, 2020

October 2020

Agrivoltaics 2020

We very much appreciated attending Agrivoltaics 2020 online event.
Agrivoltaism is a combination of agriculture and electricity production from solar panels on the same land.
It is relevant for the photovoltaic development and the protection of agricultural lands from drought or frost events.
It was a great opportunity to introduce our Photosynthetically Active Radiation service, delivering historical solar radiation data used by the plants to process photosynthesis.

solar training scheduled from january 25 to 29, 2021

September 2020

Solar training


The annual solar training that we co-organise with the research center O.I.E from Mines ParisTech is scheduled from January 25 to 29, 2021.

It is the perfect occasion to discover the science related to surface solar radiation, ground sensors, satellite imagery, solar mapping, solar variability and forecast and the solar data processing.

Please contact Dr Mathilde Marchand to save your seat!

global horizontal irradiation anomaly maps over france

September 2020

Anomaly maps service

This service is useful to get to know if last month's solar trend was rising or decreasing in comparison to the long-term period.
⇒ Last month's anomaly map is delivered every month by Marion from SoDa team.
Do not hesitate to contact us if you are interested in anomaly map with your variables of interest (solar radiation, ultraviolet, weather) and over the region of your choice.

job offer: r&d engineer in computer science

August 2020



SoDa team is looking for an engineer in computer science in Sophia Antipolis, France. The job offer is available here.

Please apply by email.


IN SUN WE TRUST solar rooftop simulator IS NOW covering all france

July 2020



SoDa team is very happy to introduce you to In Sun We Trust solar cadastre which covers now all roofs in France. This achievement is the result of several years of work and calculation using our HelioClim-3 solar radiation database

This allows a very precise estimation of the potential production of photovoltaic panels in any rooftop, calculated from 15 years of irradiation data, and considering all the effects of local shading (of buildings, vegetation, and relief) at a resolution of 20-25 cm.

We are very proud and thankful to In Sun We Trust for their trust and collaboration, to allowed us to participate in the establishment of this French solar cadastre.


June 2020



Our artificial intelligence solar forecast service delivering solar radiation time series for today and tomorrow is now available for all solar radiation components:

  • Global, direct, diffuse and reflected irradiation,
  • Over horizontal, tilted, and normal planes.

This service is based on a machine learning method called Gradient Boosting

Solar AI forecast service uses as inputs :

You can check AI Forecast results updated in real-time over Petrolina, Brazil, and Carpentras, France here.

improvements and deliverables

June 2020



The SoDa development team is working hard to deliver new features to our services:

 Improvement of the quality of our new solar radiation forecast service:
  • several time steps available, from 1 to 60 minutes
  • direct and diffuse irradiations available at horizontal, tilted and normal planes
  • considers the relief shadows.
 For the Helioclim-3 solar radiation time series obtained through automatic access, you can now choose the meteo parameters that you wish in the output file.
 SoDa speed of web services increased.
All the informations about these improvements are available at our release notes page.