Abotrut. A hierarchical control strategy is developed in thispaper for robotic systems (multiple robots systems) holding a rig. id body to track a given motion in the presence o f enviromrntal con. draintl. New mathematical formulation to the enviromental con. dralnts is introduced which is simple enough in many caws. The control b constructed following a master-helper control scheme in which t...

Tbis paper describes a global environmental data distribution systeD (GEDDS) wbich uses a siogle sDall satellite operating in a low polar orbit. The satellite collects envirollllental data frolll remotely located instru:aentation platforms and distributes it to research laboratories and other interested organizations virtually anywhere in the world. A command link also allows principal investig...