Can a radius of curvature be calulated from omega-k?

[Buzz Bloom]

A 2013 paper ( http://arxiv.org/pdf/1312.4854v1.pdf ) gives the following: Ω_k = 0.0010 ± 0.0029. Can a value for the radius of curvature be determined from Ω_k = 0.0010? If so, what is it, and what is the formula? If not, why not?

 

[Chalnoth]

$$R_c={c \over H_0 \sqrt{|\Omega_k|}}$$