GOES14 PLT Weekly Report Fangfang Yu Gordana Rancic

GOES-14 PLT Weekly Report Fangfang Yu Gordana Rancic 12/31/2009

GOES-14 Imager Visible Channel: Initial Postlaunch Calibration 1. Purpose • provide the initial post-launch operational calibration coefficients 2. Data • GOES-14 Imager visible and Terra MODIS collocation data on 12/23/2009 3. Method • Wu, X and F. Sun (2005). Post-launch calibration of GOES Imager visible channel using MODIS, SPIE, Vol. 5882, doi: 1117/12. 615401.

GOES-14 Imager Visible Channel: Initial Postlaunch Calibration Figure. Upper: the accumulated histograms of GOES-MODIS collocated cloud pixels (R > 15%) (black: post-launch cal. GOES data, red: MODIS estimated GOES data, and blue: pre-launch GOES data). Lower: percentages of mismatched cloud pixels at various slope correction The correction factor is the slope correction with lowest mismatched GOES-MODIS reflectance histogram in the red line data range.

GOES-14 Imager Visible Channel: Initial Postlaunch Calibration Results: • Rpost = Rpre * C 1 Rpost and Rpre are the post-launch and pre-launch calibration reflectance/radiance; C 1 = 1. 0695 is the correction factor. • Also available at http: //www. starnesdis. noaa. gov/smcd/spb/fwu/homepag e/GOES_Imager_Vis_Op. Cal. php#g 14_init_postlaunch • This result is consistent with initial post-launch calibration for GOES-12/13 (C 1 = 1. 08/1. 12) but is barely in agreement with lunar calibration result for GOES-14 (C 1 = 0. 99).