Provided is an antenna control apparatus for controlling an antenna mounted on a stratospheric platform of the stratospheric communication system. In addition, an image compression unit is configured to compress the composite image using the compression parameter selected by the selection unit. The frequency assignment scheme selects a suitable channel from a set of candidate channels and ensures that the femtocell has an acceptable coverage area even when it is close to the macrocell base station. Each sheet is aligned with the sheet path and analyzed by analysis devices including at least one magnetic read head, an imager andor a validation device. One embodiment of the inkjet printhead assembly includes multiple printheads disposed on a carrier to form a wide-array inkjet printhead assembly.