Poster presented at Exoclimes VI. Contact: jared.splinter@mail.mcgill.ca Abstract: Previous implementations of 1D exoplanet spectral retrieval use the disk integrated retrieval method, which assumes the planet’s atmosphere is spherically symmetric. phase curves on a 2D framework has shown to provide more accurate and self-consistent results. Unfortunately, this comes with an increased trade-off of increased model complexity and increased parameter space that can make results more difficult to interpret and validate. As planets are intrinsically 3D in nature, we would prefer a retrieval approach that is not too simple to miss important aspects of the atmosphere, while also not being not too complicated to make fitting and explanation more difficult. Exoplanet phase observations can be fitted with a Fourier series that can be analytically converted to longitudinal maps. By treating each wavelength independently, this will produce a longitudinal map of an exoplanet at each wavelength. This in turn, creates longitudinally resolved spectra capable of conducting retrieval on spectra from longitudinal slices of the planet which can be fit to pre-existing 1D spectral retrieval codes. This work aims to compare the performance of longitudinally resolved and disk integrated spectral retrieval methods on synthetic spectra of HD 189733b and establish a recommendation for future exoplanet observations with JWST and ARIEL.