magic angle spinning nuclear magnetic resonance spectroscopy rotational-echo double-resonance spectroscopy CHMO:0000896 rotational echo double resonance spectroscopy A magic angle spinning nuclear magnetic resonance spectroscopy in which the evolution of dipolar couplings between nuclei is controlled by applying pulses at appropriate points in the rotational period, allowing the determination of the size of the coupling and, thus, yielding distance information. rotational echo double-resonance (REDOR) spectroscopy REDOR