Comparison of the old (V1) and new (V2) neutral mass density observations of GRACE A in terms of orbit mean μ(ρ_V1, ρ_V2) (top) and orbit standard deviation δσ(ρ₁, ρ₂) (middle). Peak values exceeding the limits of the vertical axis are as low as 0.4 and as large as 2.0 in the orbit mean and as large as 200% in the orbit standard deviation. The accelerometer temperature is illustrated for reference (bottom).