Does anyone know where I can find a detailed/tabulated (say, at 1-5 nm steps) solar irradiance (spectral) data at sea level? Something corresponding to this low-resolution image here:
Detailed solar spectrum wanted
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Re: Detailed solar spectrum wanted
Perfect, thank you! Exactly what I needed. The data is here (web interface with textual export functionality): https://bass2000.obspm.fr/solar_spect.php
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Re: Detailed solar spectrum wanted
For solar irradiance, it might be better to use this :
https://www.nrel.gov/grid/solar-resource/spectra.html
It is given for sea-level (1.5 airmass), and also on top of Earth atmosphere.
This is the source for the graph you gave.
But it all depends on what you need exactly.
https://www.nrel.gov/grid/solar-resource/spectra.html
It is given for sea-level (1.5 airmass), and also on top of Earth atmosphere.
This is the source for the graph you gave.
But it all depends on what you need exactly.
Christian Viladrich
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/
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Re: Detailed solar spectrum wanted
Thank you, Christian, I'll check that out.
I've been thinking about some potential CaK modding, and wanted to do some initial calculations of how much light a setup will provide. I figured I can get a good idea by combining these data:
- solar irradiance (provided here)
- detailed QE curve of my sensor (found online)
- transmission curves of the Barr Associates final filter in a Lunt CaK module, and of Solar Continuum (both already measured and published here on SolarChat)
- shutter and gain values I use in my sessions for the above filters, at specific F-ratios and telescope type
I've been thinking about some potential CaK modding, and wanted to do some initial calculations of how much light a setup will provide. I figured I can get a good idea by combining these data:
- solar irradiance (provided here)
- detailed QE curve of my sensor (found online)
- transmission curves of the Barr Associates final filter in a Lunt CaK module, and of Solar Continuum (both already measured and published here on SolarChat)
- shutter and gain values I use in my sessions for the above filters, at specific F-ratios and telescope type
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Re: Detailed solar spectrum wanted
Ok, I see. Probably the iradiance (ASTM) is more usefull for this.
This is the data I used to calculate the amount of energy transmitted by various ERF configurations.
On the other hand, in order to calculate the contrast (or selectivity) of a SS, DS, TS combination, I used the BAS2000 solar spectrum :
http://astrosurf.com/viladrich/astro/in ... ntrast.htm
This is the data I used to calculate the amount of energy transmitted by various ERF configurations.
On the other hand, in order to calculate the contrast (or selectivity) of a SS, DS, TS combination, I used the BAS2000 solar spectrum :
http://astrosurf.com/viladrich/astro/in ... ntrast.htm
Christian Viladrich
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/