The ISOPHOT Interactive Analysis system, a calibration and scientific analysis tool for the ISOPHOT instrument on board ESA's Infrared Space Observatory (I SO), has been further developed while ISO is in operation. In this paper we describe some of the improvements achieved in the last few months in the areas of scientific analysis capabilities

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We have known for over three decades that the Sun has depleted its surface lithium. During this period it has become increasingly evident that mixing, unaccounted for by the standard models, occurs in the stellar interior. There is some conjecture that this mixing may be driven by rotation and thus be dependent upon the rotational history of the

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Meridional circulation from the equator to the poles is found by applying ring diagram analysis to helioseismic data. The data are SOI/MDI Dopplergrams taken every minute during its Dynamics Program in 1996. The time span used in this work is about 50 hours (~3000 images). Studying sections of 15x15 degrees over the solar surface centered at

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