Tropospheric slant columns have been retrieved from GOME observations during the TRACE-P period from March 16 through April 15, 2001 [Mean Columns (ASCII)] [Daily Columns (tar file)]. (No GOME observations are available from February 15 through March 15, 2001). The air mass factor (AMF) conversion from slant columns to vertical columns and a cloud correction will be completed soon. The AMF calculation should change the relative spatial distribution of NO₂ by up to a factor of 3, increasing the contrast between NO_x surface source regions and other regions. For more information on the retrieval, please see our recently submitted paper [Martin et al., 2001 (pdf)].