[1] G M Dobson. Forty years' research on atmospheric ozone at Oxford: A history. Applied Optics, 7, 387-405(1968).

[2] B Leroy. Photometric uncertainties. Applications to the Dobson spectrophotometer. Journal of Optics, 16, 169-176(1985).

[3] D L McCulloch. The applicability of Lambert-Beer's law. Documenta Ophthalmologica, 38, 279-282(1974).

[4] J Kim, J Kim, H K Cho et al. Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea. Atmospheric Measurement Techniques, 10, 3661-3676(2017).

[5] V E Fioletov. Comparison of Brewer ultraviolet irradiance measurements with total ozone mapping spectrometer satellite retrievals. Optical Engineering, 41, 3051(2002).

[6] W D Komhyr, C L Mateer, R D Hudson. Effective Bass-Paur 1985 ozone absorption coefficients for use with Dobson ozone spectrophotometers. Journal of Geophysical Research: Atmospheres, 98, 20451-20465(1993).

[7] N J Pust. Comparison of skylight polarization measurements and MODTRAN-P calculations. Journal of Applied Remote Sensing, 5, 053529(2011).

[8] A Bucholtz. Rayleigh-scattering calculations for the terrestrial atmosphere. Applied Optics, 34, 2765-2773(1995).

[9] F Kasten, A T Young. Revised optical air mass tables and approximation formula. Applied Optics, 28, 4735-4738(1989).

[10] F Kasten. A new table and approximation formula for the relative optial air mass. Archiv Für Meteorologie, Geophysik Und Bioklimatologie, Serie B, 14, 206-223(1965).

[11] T Ingold, C Mätzler, C Wehrli et al. Ozone column density determination from direct irradiance measurements in the ultraviolet performed by a four-channel precision filter radiometer. Applied Optics, 40, 1989(2001).

[12] J Herman, A Cede, E Spinei et al. NO2 column amounts from ground-based Pandora and MFDOAS spectrometers using the direct-sun DOAS technique: Intercomparisons and application to OMI validation. Journal of Geophysical Research: Atmospheres, 114, D13307(2009).

[13] J Robinson, A Kotsakis, F Santos et al. Using networked Pandora observations to capture spatiotemporal changes in total column ozone associated with stratosphere-to-troposphere transport. Atmospheric Research, 238, 104872(2020).

[14] J A Morales, J Treacy, S Coffey. Urban ozone measurements using differential optical absorption spectroscopy. Analytical and Bioanalytical Chemistry, 379, 51-55(2004).

[15] K Baek, J H Kim, J R Herman et al. Validation of Brewer and Pandora measurements using OMI total ozone. Atmospheric Environment, 160, 165-175(2017).

[16] J Herman, R Evans, A Cede et al. Comparison of ozone retrievals from the Pandora spectrometer system and Dobson spectrophotometer in Boulder, Colorado. Atmospheric Measurement Techniques, 8, 3407-3418(2015).

[17] A J Reed, A M Thompson, D E Kollonige et al. Effects of local meteorology and aerosols on ozone and nitrogen dioxide retrievals from OMI and pandora spectrometers in Maryland, USA during DISCOVER-AQ 2011. Journal of Atmospheric Chemistry, 72, 455-482(2015).