  There is an every-growing need to construct large space telescopes and
structures for observation of exo-planets, main-belt asteroids and NEOs. Space
observation capabilities can significant enhanced by large-aperture structures.
Structures extending to several meters in size could potentially revolutionize
observation enabling technologies. These include star-shades for imaging
distant objects such as exo-planets and high-resolution large aperture
telescopes. In addition to size, such structures require controllable precision
surfaces and high packing efficiencies. A promising approach to achieving high
compaction for large surface areas is by incorporating compliant materials or
gossamers. Gossamer structures on their own do not meet stiffness requirements
for controlled deployment. Supporting stiffening mechanisms are required to
fully realize their structural potential. The accuracy of the 'active' surface
constructed out of a gossamer additionally also depends on the load bearing
structure that supports it. This paper investigates structural assemblies
constructed from modular inflatable membranes stiffened pneumatically using
inflation gas. These units assembled into composites can yield desirable
characteristics. We present the design of large assemblies of these modular
elements.
