--- title: "SteadySat" description: "Accurate solar forecast and live solar irradiance data up to 6 hours ahead using real-time satellite imagery. Try Steadysat free for 30 days!" url: "https://steady-sun.com/steadysat-intraday-forecasts/" date_modified: "2026-07-21T11:22:16+02:00" --- # Steadysat, live solar data powered by satellite imagery Using satellite data, Steadysat technology analyzes cloud cover and atmospheric conditions to provide reliable short-term solar energy forecasts. [Experience our forecasts](https://steadyweb.steady-sun.com/account/signup/) [Get the Steadysat product sheet](https://steady-sun.com/wp-content/uploads/2026/07/steadysun-steadysat-product-sheet-en.pdf) [Get the Steadysat product sheet](https://steady-sun.com/wp-content/uploads/2026/07/steadysun-brochure-steadysat-fr.pdf) --- ## What is SteadySat technology used for? ### Get ultra-short-term solar forecasts from satellite data Steadysat technology provides real-time solar irradiance and **PV production forecasts up to 6 hours ahead**. By **aggregating live data from 5 geostationary satellites** from leading space agencies ([NOAA](https://www.noaa.gov/), [EUMETSAT](https://www.eumetsat.int/), and [JMA](https://www.jma.go.jp/jma/indexe.html)), our technology continuously monitors and analyzes key atmospheric parameters. **Steadysat perfectly complements** [Steadymet](https://steady-sun.com/steadymet-day-ahead-forecasts/) our advanced power model forecasting solution. Together, they offer a complete stack for both short-term satellite nowcasting and mid-range weather forecasts. ![Steadysun intra-day 1-hour ahead AC power forecast for fixed PV plant](https://steady-sun.com/wp-content/uploads/2025/06/PAC_intraday.png) Intra-day (1-hour ahead) AC power forecast for a fixed PV plant Steadysat is an indispensable technology for all actors seeking to maximize the value of their solar assets** in an environment where reactivity and precision** have become decisive competitive advantages. Leverage Steadysat for: - **Efficient load following** - **Intelligent energy storage control** - **Enhanced energy trading** on the intraday market (with savings potential of up to €2/MWh) ### Technical specifications of our live solar forecasts ### Max time horizon 6 hours ### Update frequency 5 - 15 minutes ### Forecast time step Up to 1 minute ### Weather parameters Power, solar irradiance data (GHI, DNI, DHI, GTI), temperature, wind and more... ### Global coverage Get accurate solar forecasts anywhere in the world : forecasts by site, portfolio, city, region or country. ### Technologies PV, Trackers, Bifacial, CSP ### Data delivery API, SFTP, etc. ### Confidence intervals Quantify uncertainty through 11 quantiles (P00, P10, P20, …, P80, P90, P100) --- ## Key benefits of SteadySat technology ## More accurate hourly and intraday solar forecasts ### Significant improvement in short-term accuracy Steadysat analyzes weather conditions in real-time. It relies on advanced nowcasting algorithms and high-resolution satellite imagery to accurately anticipate localized effects.  ### Data delivery flexibility Gain complete control over your data delivery. Select weather parameters, define your ideal update frequency (down to 5-minute intervals), choose the optimal time granularity, and receive data in formats that seamlessly integrate with your existing systems (API, FTP, web interface). ### Global coverage Steadysat instantly processes data from 5 geostationary weather satellites, ensuring live solar forecasts across all continents. ## How does SteadySat technology work? ### An innovative multi-source data fusion Steadysat’s true strength lies not just in satellite data, but in its **comprehensive data fusion** from multiple sources: - Meteorological data to contextualize atmospheric conditions. - In-situ measurements from your installations for precise model calibration. - Sophisticated physical models faithfully representing optical and atmospheric phenomena. - Artificial intelligence algorithms for identifying and forecasting cloud movement. - And, as you know, high-resolution satellite imagery capturing cloud formations and their dynamics in real-time. ### About high-resolution satellite observations Each satellite provides data on: - Cloud formation and motion - Aerosol concentration (e.g. dust, biomass-burning, sea salt), affecting solar irradiance - Atmospheric water vapor and other relevant meteorological indicators Their combination enables global coverage with **high resolution (0.5 to 3 km, 5 to 15 min) **and ensuring **Steadysat’s** ultra-accurate solar forecasts for the next few hours. ![Satellite-based GHI forecast map for Western Europe](https://steady-sun.com/wp-content/uploads/2025/05/satellite-based-GHI-forecast-above-western-europe.webp) Steadysun satellite-based forecast with cloud motion and irradiance ![World map showing satellite coverage areas](https://steady-sun.com/wp-content/uploads/2026/07/carte-satellite-sansgrille.png) Space-based observation network ![Satellite orbiting above Earth](https://steady-sun.com/wp-content/uploads/2025/03/nasa-yZygONrUBe8-unsplash-1-scaled.jpg) Global view with active satellite ## Continuous optimization ### Refining Steadysat's accuracy with your site measurements When available, Steadysat integrates **real-time or historical production data** (e.g. irradiance sensors, power meters) to continuously refine its outputs: - AI models adapt based on site-specific errors and meteorological behavior - Performance improves over time thanks to machine learning-based calibration - Solar forecast accuracy is monitored and optimized daily --- ## Sign up for your 30-day free trial now! Discover the best of SteadyWeb, our autonomous forecasting plateform. Optimize** two plants free** with Expert+ features – no commitment ! [Experience Steadysun's API 30 days free | No credit card required](https://steadyweb.steady-sun.com/account/signup/) ![Aerial image of solar PV field](https://steady-sun.com/wp-content/uploads/2025/04/solar-power-plant-field-aerial-view-solar-panels-1-scaled.jpg) --- ## 4 steps to obtain intraday solar forecasts ### Steadysat forecasting process ![Earth with meridians, thermometer and battery](http://steady-sun.com/wp-content/uploads/2025/03/data-acqusition-steadymet.png) #### Data acquisition - Live images from 5 geostationary satellites. - Different channels providing information on the atmosphere, clouds and aerosols. - Every 5 to 15 minutes. ![Solar panel and wind turbine illustration](http://steady-sun.com/wp-content/uploads/2025/03/modeling.png) #### Modeling - Cloud detection, classification and motion prediction. - Accurate estimation of clear sky conditions using real-time aerosols prediction. - Calculation direct and diffuse irradiance components in cloudy conditions. - PV modeling based on physical models and plant features. - High-resolution topographical corrections (down to 90m). - Probabilistic forecasting using physical and statistical approaches. ![Gear with analytics chart](http://steady-sun.com/wp-content/uploads/2025/03/modeling-regular.png) #### Optimization - Based on historical and/or real-time on-site measurements. - Continuous accuracy improvements using state-of-the-art machine learning techniques. - To take into account local weather phenomena and power plants’ behavior. ![Computer screen displaying SteadySun](http://steady-sun.com/wp-content/uploads/2025/03/dissemination.png) #### Delivery - Flexible delivery (API, SFTP, etc..). - Customized format (csv, txt, etc.). - Dedicated and secured web interfaces (visualization, data analytics and warnings). - Forecast performance monitoring. --- ## Meteorological data available ## All of the essential weather data for monitoring and optimizing your PV assets Type Short name Description Unit Production pac Solar AC power at inverter output W Irradiance ghi, bni, dhi, bhi Global, beam, diffuse, horizontal irradiance with the cloud cover taken into account. W.m⁻² PAR par Photosynthetic active radiation. W.m⁻² [Explore full API documentation for more](https://steadyweb.steady-sun.com/rapidoc/) ### Ready to experience our solar forecasting API? **Put our forecasts to the test** — easily integrate our solar data into your tools and see the impact firsthand. With our solar API, nothing could be simpler or faster. [Let's get started!](https://steadyweb.steady-sun.com/account/signup/) --- ## Use cases Steadysat is particularly suited to** optimizing storage allocation **and** intraday trading markets**. ## Carousel ![AI image of solar panels, wind turbines, and trading graphs](https://steady-sun.com/wp-content/uploads/2025/04/freepik__the-style-is-candid-image-photography-with-natural__26866.webp) ### Renewable energy trading & portfolio management Optimize transactions on power markets. Reduce unbalancing costs. Manage risks. [Learn more](https://steady-sun.com/renewable-energy-trading-portfolio-management/) ![Electric car city layout with solar/wind energy system](https://steady-sun.com/wp-content/uploads/2025/04/high-angle-3d-electric-cars-streets-scaled.jpg) ### Solar hybrid power systems & Microgrids Foster solar energy use. Reduce investment and operating costs. [Learn more](https://steady-sun.com/hybrid-energy-systems-microgrids/) ![Two people examining a renewable energy layout outdoors](https://steady-sun.com/wp-content/uploads/2025/04/engineers-discussing-plan-high-angle-scaled.jpg) ### Solar & wind project development Know the future profitability of your projects, taking into account weather variability. [Learn more](https://steady-sun.com/project-development/) ![Two people walking near solar and wind installations](https://steady-sun.com/wp-content/uploads/2025/04/engineers-talking-about-solar-pannels-medium-shot-scaled.jpg) ### Plant operation & maintenance Make your solar and wind power plants more profitable. Limit penalties, maximize revenues. [Learn more](https://steady-sun.com/plant-operations/) ![Solar panels on a tropical island with palm trees](http://steady-sun.com/wp-content/uploads/2025/02/66e0f4868b684336ece0956478a10d79.jpeg) ### Insular system management Maximize the use of renewable energies while ensuring grid balancing. [Learn more](https://steady-sun.com/insular-system-management/) ![Hands and sticky notes on a transparent board](https://steady-sun.com/wp-content/uploads/2025/04/businessman-making-presentation-with-his-colleagues-business-strategy-digital-layer-effect-office-as-concept-scaled.webp) ### Research & Innovation Get vast, timely environmental data to validate models, track phenomena, and accelerate discoveries. [Learn more](https://steady-sun.com/research-innovation/) --- ## Related products & technologies ### Real-time irradiance and PV production data Access live solar irradiance data, and much more, to optimize PV production and energy efficiency. [Discover](https://steady-sun.com/real-time-irradiance-and-pv-production-data/) ### Solar energy forecasting Accurate solar power forecasts using weather-based models. Anticipate variability and optimize energy performance with confidence. [Discover](https://steady-sun.com/solar-energy-forecasts/) ### Steadymet, our advanced power forecasting model Steadymet enhances the accuracy of renewable energy forecasts by using a multi-model approach based on meteorological models. [Discover](https://steady-sun.com/steadymet-day-ahead-forecasts/)