With the emergence of the idea of using GNSS in establishing High Accuracy
Reference N network “HARN”, the Egyptian Survey Authority (ESA) established the
Egyptian’s HARN network and linked it to the international frame (ITRF1994
epoch1996) as a static frame. With the continuous development of the construction of
IGS stations and the emergence of the concept of tectonic plate motion, and the concept
of Precise Point Positioning technique has a well know precise technique, there were
offset in the current coordinates of the HARN network about 40cm, so a set of simple
transformation parameters (Tx, Ty, Tz) were calculated and using these parameters can
convert the coordinates in ITRF2008 to HARN network (ITRF1994 epoch1996). In this
paper two types of models (ITRF2008 Plate Motion Models, and Egypt Deformation
model) were used to calculate these parameters.