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What is the spectrum of the GHI data (POWER Project)?

Posted: Mon Mar 01, 2021 9:35 pm America/New_York
by tsdejong1234
Hi all,
I am wondering what the irradiance spectrum for the 'All Sky Insolation Incident on a Horizontal Surface' data is from NASA's POWER Project? (ie. 300-800nm? 300-3000nm?)
Thank you

Re: What is the spectrum of the GHI data (POWER Project)?

Posted: Tue Mar 02, 2021 9:02 am America/New_York
by ASDC - mcook
Thank you for your question. A Subject Matter Expert has been notified and will answer your question shortly. Please stand by!

Re: What is the spectrum of the GHI data (POWER Project)?

Posted: Tue Apr 27, 2021 1:24 pm America/New_York
by ASDC - pstackhouse
Dear tsdejong1234,

I think we answered your question, via e-mail, however, for Forum users I thought I'd enter the answer to this question. The surface solar irradiance or "Global Horizontal Irradiance" available at the POWER web site is the full spectrum irradiance spanning the wavelength 225 nm to 4000 nm (0.225 - 4.0 micrometers). The wavenumber span is 2500 to 57000 cm^-1. These spectral ranges are identical to the GEWEX SRB (https://gewex-srb.larc.nasa.gov) and CERES (https://ceres.larc.nasa.gov) that are processed and reformatted for POWER web services. Please let us know if you have any additional questions.

Paul and the POWER Team