Bewsher, Danielle ORCID: 0000-0002-6351-5170, Brown, D. S. ORCID: 0000-0002-1618-8816, Eyles, C. J., Kellett, B. J., White, G. J. and Swinyard, B. (2010) Determination of the Photometric Calibration and Large-Scale Flatfield of the STEREO Heliospheric Imagers: I. HI-1. Solar Physics, 264 (2). pp. 433-460. ISSN 0038-0938