We have analysed MOS of PERN and PERN-POP nodes from SLAC. Results some what suggest that
1. There is an improvement over the months in both PERN and PERN-POP nodes MOS as seen from SLAC.
2. There is increase in consistency in the MOS values of all the nodes as per suggested by inter quartile range (difference of 75% and 25%) See pern-MOS.xlsx from June 2010 to May 2011.
3. PERN and PERN-POP nodes are performing equally good. There is not much difference in performance of PERN-POP node from SLAC.