Fractional error in the power spectrum versus wave number k at a redshift of z = 0.9. Here we use a binning scheme with Δk = 1 h Mpc^-1. The two upper curves are for parameters from surveys 1 and 2, with only a first pass for survey 2. The lower curve is for survey 2, with an observing time of two years. The z-range is 0.5 to 2.5. The survey and pixel volume assume Δz ≈ 0.3, which corresponds to our nominal frequency bandwidth of 1 MHz.