Technical reports/notes that were produced as part of ESA contract work that are relevant to the L2B/C processing are provided for download here:

NameBrief descriptionDownload
TN15.1, Inventory of Aeolus Target Assimilation Systems AE-TN-ECMWF-151-v2.0_20131123_Target_Assim_Systems.pdf
TN15.2, Aeolus observational requirements and the measurement grouping algorithm AE-TN-ECMWF-152-v2.0_20131121.pdf
TN15.3, AE-TN-ECMWF-153-v3.1_20140319_final.pdf