This is Fluspect-Cx published by Nastassia Vilfan (fluspect_B_Cx_PSI_PSII_combined.m):
Vilfan, N., Van der Tol, C., Yang, P., Wyber, R., Malenovský, Z., Robinson, S. A., & Verhoef, W. (2018). Extending Fluspect to simulate xanthophyll driven leaf reflectance dynamics. Remote sensing of environment, 211, 345-356.
It contains a parameter for the Xanthophyll de-epoxydation status, the specific absorption coefficients of PROSPECT-D, and a re-calibrated fluorescence emission spectrum ('phi'). These can be found in the file 'Optipar2017_ProspectD.mat'.
Fluspect-B by Nastassia Vilfan et al., (2016) is also included (fluspect_b_car).
The function 'master' fits Fluspect_CX to measured reflectance and/or transmittance