The chromosphere has long been studied from ground-based telescopes in optical wavelengths, especially the strong Fraunhofer lines. This has the benefits of being relatively cheap and simple to implement, with in situ corrections easy to perform. Advances in both telescope technology and post-processing has also improved the quality of data from ground-based telescopes. However space-based telescopes will always have the advantages of being able to provide long-duration observations, free of any atmospheric distortion, in all wavelengths. The work in this thesis utilises both ground- and space- based observations, with the aim of maximising the respective advantages of each.