A reliable distribution of information to receivers 
located in different regions of world (e.g. simultaneous uploading 
of web servers), can be effectively carried out using multicast 
technology. From the other side, the usage of satellite IP network 
(from IP angle of view: a single-hop broadcast link) allows easy 
disseminate information to a large group of users that may span 
a large geographical area. In the paper, possibilities of usage of 
Pragmatic General Multicast (PGM) transport protocol for wide-area 
distribution using satellite links are discussed. Simulational 
results show, that PGM is able to assure reliable data 
transmission and good scalability in heterogeneous 
terrestrial-satellite environment.