(Upper panel) Summary of periods at which ratios of PREMOS-A:PREMOS-B were calculated, and (lower panel) the subsequent relative difference of TSI, in W m−2, between PREMOS-B and SOHO/VIRGO relative to groups 7 and 8 (see also Fig. 4). All uncertainties are stated for confidence intervals of 68%.
|Exp. time A, days||1.91||2.50||4.89||8.44||10.71||12.31|
|Exp. time B, days||0.02||0.05||0.08||0.12||0.15||0.44|
|Correction1, B, ppm||1.5||4.2||6.9||9.7||12.5||35.6|
|Ratio-68% confidence interval, ppm||59.6||238.8||310.6||73.4||56.2||77.3|
|Standard error on mean, ppm||8.6||34.5||44.8||10.6||8.1||11.2|
|Bootstrap-68% confidence interval, ppm3||8.4||34.9||44.7||10.6||7.9||11.2|
|Point N||7||84||9||10||11||12||9–12 mean|
|Exp. time B||1.91||2.50||4.89||8.44||10.71||12.31|
|Δ(PR − B(N − 7) − VIR(N − 7))5||0.00 ± 0.02||–||0.12 ± 0.06||0.12 ± 0.02||0.12 ± 0.01||0.11 ± 0.02||0.12 ± 0.026|
|Δ(PR − B(N − 8) − VIR(N − 8))||–||0.00 ± 0.05||0.04 ± 0.06||0.05 ± 0.02||0.04 ± 0.01||0.03 ± 0.02||0.04 ± 0.06|
Correction of PREMOS-B values using the 81.7 ppm per exposure day from Schmutz et al. (2013) with an estimated 10% uncertainty.
Confidence intervals are calculated through bootstrapping and, from random sampling, contain the 10% estimated uncertainty on the 81.7 ppm per exposure day correction applied to PREMOS-B; they have a Gaussian distribution.
We note that the same exposure periods in PREMOS-B with 48 exposures that go in to calculating the ratios PREMOS-A:PREMOS-B are not made contiguously for group 8. Therefore, we consider the group which has the majority of observations here.
These are the values plotted in the lower panels of Figure 4.
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