art B2. Istanbul 2004 
not be required to 
ept when there is a 
oastal zone should be 
0 account). 
/ the autonomous flight 
issues and weather 
UAV does not have to 
nost basic requirement 
will be to produce a 
isly, it will always be 
ntrol from the ground 
ted, so all data will be 
n. Using X-band line- 
t 200 km in radius can 
his coincides with the 
1, the ground reception 
he UAV. Also, there is 
lled from one ground 
igher than 200 km, an 
rafts, flying at higher 
integrity, the data will 
nomaly is detected, the 
-image the concerned 
lation products to the 
This includes applying 
ion information, and 
is will be implemented 
the methodology of 
he summer of 2005, 
jle by using the Flepos 
ted over the Flemish 
Walcors GPS network 
of Belgium (Walcors, 
lar services in Europe 
witzerland. 
mally documented and 
. shall comply to the 
nd private users. 
le to the public, up to 
lished internet portals. 
y (visual or thermal), 
o information derived 
hg products, etc., ... 
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B2. Istanbul 2004 
5. CONCLUSIONS 
The PEGASUS project will offer remotely sensed data and 
information with high spatial, spectral and temporal resolution. 
The unique platform, which is unmanned and flying at 
stratospheric heights (between 12 and 20 km altitude) offers the 
advantages associated with both airborne and spaceborne 
systems, without their disadvantages, but with some limitation 
with respect to the weight of the payload. 
The system is set to fly its first demonstration tests in the late 
summer of 2005, in Belgium. 
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ACKNOWLEDGEMENTS 
Parts of the work presented were sponsored by ESA and the 
Ministry of the Flemish Community.