  We calculate equilibrium emittances and damping times due to the emission of
synchrotron radiation for coupled storage ring lattices by evaluating the
projections of the commonly used synchrotron radiation integrals onto the
normal modes of the coupled motion. Orbit distortion is included by calculating
off-axis contributions to the radiation integrals. We provide explicit formulae
for fast forward calculation, which have been implemented into the interactive
lattice design code OPA.
