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Posted on behalf of a user:

I am doing my degree project about a model of solar radiation prediction based on artificial neural networks in some areas of my country. For this reason,I need daily data of the last ten years of the following meteorological variables: solar radiation, ambient temperature (minimum, maximum and average), wind speed, relative humidity, cloudiness, rainfall, hours of solar brightness and evaporation. I contacted the IDEAM and they have these data in my country, but the data was not adequate. I need the daily data of three specific zones, the locations of the zones are the following: Armenia(Latitude:4°32'02'' North, Longitude:75°40'51'' West, Altitude:1480 m), Pereria (Latitude:4°48'47'' North, Longitude:75°41'45'' West, Altitude:1414m), Manizales (Latitude:5°04'08'' North, Longitude:75°31'02'' West, Altitude:2119 m).

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  1. The Prediction Of Worldwide Energy Resource (POWER) may be of interest to you for your research.
    The POWER web site has recent daily and monthly solar radiation and meteorological data from 1983 through near real time (< 10 days ago for radiation ; < 5 days ago for temperature, etc.).

    Here are the instructions for obtaining daily data you are looking for.
    - Go to https://power.larc.nasa.gov/ .
    - Select "Sustainable Buildings" which will open a new page, " Climatology Resource for Sustainable Buildings".
    - Select "Higher resolution near-real time daily time series of solar radiation and meteorology".
    - A new page will open to "Higher Resolution Daily Time Series by Location".
    - Enter the latitude and longitude coordinates, Start date and Enter dates, and select one or more parameters (located in the parameters box).
    **The resulting page will be daily averages in columned ascii format.

    Also, another way of obtaining monthly or daily solar radiation data is by using the POWER Data Access Viewer web mapping application which is in its beta release and can be found at https://power.larc.nasa.gov/data-access-viewer/ . To do so, navigate to the POWER Single Point Data Access widget (will appear on left side of screen by default), select your User Community (Sustainable Buildings), select your temporal range, input your latitude and longitude coordinates. The output files should appear once data is processed.

  2. Posted on behalf of a user:

    Where do the data provided by the POWER project come from? Does this data come from weather stations located in the area? Or does it come from processing satellite images and extracting said data?

    If the data comes from a processing of satellite images, what is the efficiency percentage which this data counts with? How close are these data to the real data provided by a weather station? What percentage of error does this processing have?

    What processing could I apply to these data to make them much more reliable?

  3. POWER includes data from: Surface meteorology and Solar Energy (SSE), Sustainable Buildings, and Agroclimatology.

    *The parameters currently available through the SSE-web based data archive are based primarily upon solar radiation derived from satellite observations and meteorological data from the Goddard Earth Observing System assimilation model, and were defined through close collaboration with industry and government partners in the solar and wind renewable energy community.

    *The parameters contained in the Sustainable Buildings Archive are based primarily upon solar radiation derived from satellite observations and meteorological data from the Goddard Earth Observing System assimilation model, and have been defined through close collaboration with industry and government partners in the buildings community.

    *The parameters contained in the Agroclimatology Archive are based primarily upon solar radiation derived from satellite observations and meteorological data from the Goddard Earth Observing System assimilation model.

    Read more about POWER at https://power.larc.nasa.gov/common/php/POWER_AboutPOWER.php

    A description of the procedures used to evaluate the solar radiation as well as other parameters for each are found in the following methodology documents:
    SSE-- https://eosweb.larc.nasa.gov/sse/documents/SSE6Methodology.pdf
    Sustainable Buildings-- https://power.larc.nasa.gov/documents/Building_Methodology.pdf
    Agroclimatology-- https://power.larc.nasa.gov/documents/Agroclimatology_Methodology.pdf

    Additional release notes are available at: https://power.larc.nasa.gov/common/php/POWER_ReleaseNotes.php