Repeat-pass interferometry data were acquired during the first and sec
ond SIR-C/X-SAR missions in April and October 1994, This paper present
s the first results from X-SAR interferometry at four different sites,
The temporal separations were one day and six months, At two sites th
e coherence requirements mere met, resulting in high quality interfero
grams, A digital elevation model in ground range geometry has been der
ived. The limitations of the X-SAR interferometry are discussed.