Prospect
Estimación rápida del potencial solar del emplazamiento fotovoltaico
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- TMY files generated for locations covered by Meteosat PRIME satellite (Europe and Africa) had a small temporal mismatch with time series. The TMY generation srcipts were updated to remove the temporal mismatch.
- Frequency of forecasts delivered via FTP was increased from 2 to 4 times a day.
- The forecasts are now delivered at 2:30 AM, 8:30 AM, 14:30 PM, and 20:30 PM (all times in UTC)
- It is now possible to request data on Wind Gust (WG) at the surface for recent and forecast time periods. Wind Gust data has been made available in response to requests from operators of PV power plants equipped with trackers. For periods when high wind gusts are predicted, PV trackers can be moved to stow positions to reduce possibility of asset damage. Wind Gust data are taken from the GFS (Global Forecast System) model operated by NOAA. The data are available for period from 1 March 2019 onward.
- Nowcasting service, based on near-real-time processing of satellite imagery, was extended to include territory covered by GOES satellite. This update is expected to result in a reduced error for Solargis intra-day forecasts for North and Central America.
- Updated coverage map for nowcasting service can be seen here: Solargis API User Guide
- Learn more about Solargis nowcasting service: https://solargis.com/products/forecast/overview/
- Elevation data, used as input for post-processing of meteorological outputs from NWP models (Temperature, Atmospheric Pressure, and Relative humidity) and for calculation of CdTe PV spectral correction, was updated. Previously the main source of elevation data was SRTM3-v2, which had inaccuracies in some islands, coastal regions, and few deserted regions.
- The primary data source for the updated elevation data layer is SRTM-v4.1, which is an improvement over SRTM3-v2, but still, some issues remained.
- Many issues have been fixed by applying patches based on multiple data sources.
Data for Americas has been improved using the first complete year of GOES-R satellite imagery:
- better snow identification and processing in GHI and DNI calculation for period from 1 January 2018
- more info about the use of GOES-R satellite in Solargis model
- IFS forecast was updated with following changes
- Forecast update frequency is 6 hours (before it was 12 hours)
- Temporal resolution for first 48 hours was increased to 1 hour, hour 48-84 remains in 3 hourly resolution
- New region covering east Brazil
- Improved gap filling of meteorological parameters, and introduced minimum and maximum limits for parameters to avoid overshoots and other erroneous data cases
- CSV file header for TMY Pxx (75,90,95,99) data has been extended to include uncertainty values. The values include GHI/DNI model uncertainty, uncertainty because of inter-annual variability, and combined uncertainty. All uncertainty values are reported at P90 confidence (1.282 * SD).
- It is planned to include the uncertainty values also in PDF report issued along with the CSV files.
- De-biasing correction for TEMP data from CFSv2 model (applicable for period 2011 onward) was improved.
- Change in temperature values for period 2011 onward is mostly within ±0.5°C. The change in long-term average is even smaller. For details of TEMP post-processing method see https://solargis.com/docs/methodology/meteo-data/#post-processing-of-air-temperature-data
