High-resolution sunspot numbers as proxies for solar 10.7cm radio flux

[Patrick P.A. Geryl]

We want to introduce the high-resolution sunspot numbers as the best proxies for the solar 10.7cm radio flux.
Our published article in Astrophysics and Space Science can be found here: 
https://www.researchgate.net/publication/342766380_A_Formula_for_the_Start_of_a_New_Sunspot_Cycle?_sg=qFnW_lMeBBwWKv_B-XwfcSiPtrwNiazSTDjOzRqwzYPpkamZKEX48Iw1deyQGFlSo_bjMFxqKBydFEJPh3fGwvHotK4gwCdlsdh2sxHR.zTHN2NR1YrZEEPuT5YdsTN16jrpeUnUzcJef-fbJjS1HS8Pgx-X89bUHaQmyGniBMO3JaEBPpttx9tMbT_anfg

 
1.0 High resolution sunspots

High resolution camera’s make it possible to see more sunspots. You can also define far better the complexity of them. 
A study of cycle 24 gives a surprising relationship between the adjusted solar flux and the measured sunspots with the 
new method in 1K SSN & 2K SSN. It gives strong evidence that this method is superior to the old one. High-resolution 
sunspots can be found here: https://www.solen.info/solar/

The archived reports can be found here:

https://solen.info/solar/old_reports/

Table 1. Used factors to compare the different sunspot methods

 

Method	Factor to be used to calculate fitted adjusted flux	Reversed formula to calculate fitted sunspot number
Fitted 2K	SSN*0.326 + 64	(AdjFlux – 64)*3.0675
Fitted 1K	SSN *0.500 + 64	(AdjFlux – 64)*2.000
Fitted mean 1K+2K	(2K + 1K)/2	(2K + 1K)/2
Fitted NOAA	SSN *0.676 + 64	(AdjFlux – 64)*1.48
Fitted ISN	SSN *0.635 + 64	(AdjFlux – 64)*1.575

Table 2. Results from the fitted sunspot numbers

 

Date 2020	2K SSN	Fitted adjusted solar flux from 2K	1K SSN	Fitted adjusted solar flux from 1K	Adjusted 10.7cm solar flux 20:00
11/30	111	100.1	55	91.5	106.4
11/29	117	102.1	74	101	113.1
11/28	151	113.2	97	112.5	106.6
11/27	127	105.4	70	99.0	103.5
11/26	125	106.8	79	103.5	103.0
11/25	94	94.6	64	96	101.0
11/24	102	97.2	64	96	97.9

 

There are for sure more relations to be found. Researchers can contact us.