Sentences with phrase «magnetograms of»
Magnetic field indices derived from synoptic magnetograms of the Mt. Wilson Observatory, i.e. Magnetic Plage Strength Index (MPSI) and Mt. Wilson Sunspot Index (MWSI), are used to study the effects of surface magnetism on total solar irradiance variability during solar cycles 21, 22 and 23.
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For the period after 1974, the model makes use of the full - disc magnetograms of the Sun and reproduces up to 97 % of the measured irradiance variation.
Not exact matches
It was time for Padilla to go up to the top of the tower to adjust the mirror for the afternoon magnetogram observations, so he put on a hard hat and buckled himself into the «elevator,» as the small open bucket is euphemistically called.
Using LOS magnetograms, the authors observed a small region of transient polarity - reversed magnetic field in the main sunspot of NOAA 11429 on 13 March 2012, which corresponded with flare brightenings seen in intensity images.
For periods after 1974, they calculate TSI values based on daily measurements of solar magnetograms.
One of the magnetograms from the sidebar should assist.
To be able to use both space - and ground - based solar magnetograms and construct long time series of derived parameters it is important to cross-calibrate them so that we can estimate their reliability and combine them.
Because our main goal is to reproduce the centennial solar variability and because magnetograms are unavailable for historical time periods, we scale the faculae and the active network filling factors with the sunspot number instead of using filling factors derived from available magnetogram data.
Different methods of comparing the magnetograms obtained by the two Kitt Peak magnetographs give somewhat different results, with factors by which 512 channel data must be divided in the range 1.38 — 1.63 being found.
A time series of daily magnetograms and empirical models of the thermal structure of magnetic features (sunspots, faculae) are combined to reconstruct total (and spectral) irradiance from 1996 to 2002.