Added 6 new or updated sitelogs (MLAC, RISC, ROXC, SJUC, SVAC, WEUC)

Updated version of the document satellite macromodels implemented in CNES POE processing including update on Jason2 and Jason3 attitude laws and a new Appendix 0 with DORIS phase center updates adopted at CNES

Added link to the second IGN ftp site at doris.ensg.eu (pages DORIS Data Centers, Tables of Data & Products, Information & data center organization; document IDS data structure and formats; menu IDS > Data & Products > IGN Data Center)