The cw radar power spectra of asteroid (85990) 1999 JV6 collected at Arecibo in January 2015. Each panel is a graph of echo power in units of standard deviation of the noise against Doppler frequency offset in Hz (relative to centre of mass). The black bar at the 0 Hz frequency has unit length. Each panel is labelled with the date of observations in [yyyymmdd] format. Solid lines represent observations (received OC spectra), and the dashed line is a simulated echo based on the best-fit radar model (see model summary in Table 3). The details of each spectrum are given in Table A.1.