 The NDVI 3G time series is an improved eight kilometers normalized difference vegetation index. NDVI data set produced from advanced very high resolution radiometer AVHRR instruments that extends from 1981 to the present with data from two different sensors AVHRR slash 2 and AVHRR slash 3. The main difficulty in processing AVHRR NDVI data is to properly deal with limitations of the AVHRR instruments including among instrument calibration difficulties and dual gain introduced in late 2000 on the AVHRR slash 3 instruments for channels 1 and 2. We have processed NDVI data derived from the sea viewing wide field of view sensor CWIFS to overcome these calibration difficulties using Bayesian methods with high quality well-calibrated CWIFS NDVI data for deriving AVHRR NDVI calibration parameters. The resulting NDVI values have an error of plus or minus 0.005 NDVI units for our 1981 to present data set, which is independent of time within our AVHRR NDVI continuum and has resulted in a non-stationary climate data set. This article was authored by Jorge Ipinzone and Compton J. Tucker. We are article.tv, links in the description below.