Estimator Precision and Selection for Up-the-Ramp Sampling with a High-Read-Noise InGaAs Camera
The study compares Ordinary Least Squares (OLS) and Correlated Double Sampling (CDS) estimators against Generalized Least Squares (GLS) for sampling high-read-noise InGaAs cameras. It establishes a precision criterion based on the ratio η = fT/σ2R to guide selection, showing OLS is better below η=10 and CDS above it. The work validates these rules against observed temporal covariance.