Solar total irradiance in cycle 23 | Astronomy & Astrophysics (A&A)

Free Access

Table 1

Comparison between the model and different data sets and between the PMOD composite and the two individual instruments.

Series-1	Series-2	Period	r _c		Slope^a	Trend^a
						[ppm/dec]

Model	PMOD	1996–2009	0.98	0.96	1.008 ± 0.01	44 ± 17
Model	PMOD-99	1999–2009	0.98	0.96	1.001 ± 0.01	−3 ± 19
Model	TIM	2003–2009	0.96	0.92	1.003 ± 0.02	18 ± 34
PMOD	TIM	2003–2009	0.99	0.98	1.022 ± 0.01	−50 ± 14
Model	ACRIM II	1996–2000^b	0.93	0.86	0.991 ± 0.05	7 ± 135
PMOD	ACRIM II	1996–2000^b	0.94	0.88	0.842 ± 0.04	−475 ± 101

Notes. Listed are the data sets that are compared; the period over which they are compared; the linear correlation coefficients and their squares, the slopes of the linear regression fits to the data sets, and the trends with time for the difference between the two sets that are compared (Series-1 – Series-2).

^(a)

Estimates of the uncertainty are based on the scatter of the measurements about the fitted lines plotted in Figs. 2 and 3.

^(b)

The ACRIM II data become very noisy after around 2000.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.