Making of a solar spectral irradiance dataset I: observations, uncertainties, and methods | Journal of Space Weather and Space Climate

Statistical Challenges in Solar Information Processing

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Table A4.

Total of 14 available proxies. For the SOLID database we truncate all proxies at 1969.

Name	Full Name	Provider	Time interval
	References and web sites
ISN	International Sunspot Number	WDC-SILSO	1818 – present
	SILSO World Data Center (1970–2015) http://sidc.oma.be/silso/ (full daily coverage since Dec. 1848)
f_10.7	10.7 cm Radio Flux	Penticton	1947 – present
	Tapping (2013), ftp://ftp.geolab.nrcan.gc.ca/data/solar_flux/daily_flux_values/,
f_3.2	3.2 cm Radio Flux	Nobeyama	1950s – present
f₈	8 cm Radio Flux
f₁₅	15 cm Radio Flux
f₃₀	30 cm Radio Flux
	http://solar.nro.nao.ac.jp/norp/html/daily_flux.html
MgII	Mg II Core-to-Wing Ratio	LASP, Boulder	1978 – present
	Viereck et al. (2004), ftp://laspftp.colorado.edu/pub/solstice/composite_mg2.dat
MPSI	Magnetic Plage Strength Index	Mt. Wilson Obs.	1970–2013
	http://www.astro.ucla.edu/~obs/150_data.html
MWSI	Mount Wilson Sunspot Index	Mt. Wilson Obs.	1970–2013
	http://www.astro.ucla.edu/~obs/150_data.html
SEM 0-order	Intensity in 26–34 nm Band	SOHO/SEM	1995 – present
	Dominated by the Hell line
CaK	Normalized Intensity of Ca IIK	Sacramento Peak	1976 – present
	Keil et al. (1998), ftp://ftp.nso.edu/idl/cak.parameters, http://nsosp.nso.edu/cak_mon
DSA	Daily Sunspot Area	Greenwich Obs.	1874 – present
	Wilson & Hathaway (2006), http://solarscience.msfc.nasa.gov/greenwch/
PSI	Photometric Sunspot Index		1874–2013
	Balmaceda et al. (2009)

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