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The total electron content (TEC) of the solar corona in June 2002 is calculated by three observational techniques and the results are compared. The first technique is solar rotational tomography (SRT) applied to a 14-day time series of LASCO-C2 polarized brightness images, and the other two techniques use the Cassini spacecraft radio beacon for Doppler tracking (phase delay) and ranging (group delay)...
The most used method to calculate the coronal electron temperature [ T e ( r ) $T_{\mathrm{e}} (r)$ ] from a coronal density distribution [ n e ( r ) $n_{\mathrm{e}} (r)$ ] is the scale-height method (SHM). We introduce a novel method that is a generalization of a method introduced by Alfvén (Ark. Mat. Astron. Fys.27, 1, 1941) to calculate T e ( r ) $T_{\mathrm{e}}(r)$...
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