Economists often estimate treatment effects in experiments using remotely sensed variables (RSVs) like satellite images or mobile phone activity.A common practice is to use an observational sample to train a predictor of the economic outcome from the RSV.However, using this method may introduce bias if the RSV is post-outcome, meaning a variation in the economic outcome causes variation in the RSV.The study proposes a new identification method that requires three predictions of RSVs for more accurate causal inference.