A Data Preparation Algorithm for the Precision Tracker LVL2 FEX

This is the first of a pair of notes on a precision tracker LVL2 FEX. The second note is entitled "Performance of a LVL2 Trigger Feature Extraction Algorithm for the Precision Tracker" In this note a data preparation algorithm for the precision tracker LVL2 FEX is presented. This algorithm is divided into four different steps: data pre-selection, clustering, space-point formation and post-selection. For each step a description of the algorithm, performance results, timing measurements and a parameterisation of the timing measurements are presented. Finally suggestions for implimentation of the algorithm in the LVL2 system are given.