50 citations · 77 across the 2 of their papers we have counts for
3 papers · 1 filter
Interpretation of Solar Magnetic Field Strength Observations
R. K. Ulrich, L. Bertello, J. E. Boyden +1
This study based on longitudinal Zeeman effect magnetograms and spectral line scans investigates the dependence of solar surface magnetic fields on the spectral line used and the w…
POLAR Investigation of the Sun - POLARIS
T. Appourchaux, P. Liewer, M. Watt +34
The POLAR Investigation of the Sun (POLARIS) mission uses a combination of a gravity assist and solar sail propulsion to place a spacecraft in a 0.48 AU circular orbit around the S…
Spectral Line Selection for HMI: A Comparison of Fe I 6173 and Ni I 6768
A. A. Norton, J. Pietarila Graham, R. K. Ulrich +8
We present a study of two spectral lines, Fe I 6173 Angstroms and Ni I 6768 Angstroms, that were candidates to be used in the Helioseismic and Magnetic Imager (HMI) for observing D…