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An investigation is conducted concerning the intensity and polarization variations from PSR 2020+28. The investigation has the objective to gain insight into the possible determinants of polarization transitions. Polarization over the range of time scales from 8 microseconds to several years is studied. Particular attention is devoted to correlations with intensity of the position angle. Orthogonal modes are described as accurately as possible in the hope that the underlying mechanisms can be discerned. PSR 2020+28 was selected for detailed study because of its high polarization, both circular and linear, and because the modality phenomenon appeared to play a particularly constitutive role in its intrapulse structure. It is found that radiation is emitted by the pulsar as an admixture of two orthogonal modes of polarization.
Cordes et al. (Tue,) studied this question.