Composite material has been widely applied in space vehicle structures due to its light weight and designed stiffness modulus. Some special mechanical properties that cannot be changed in general metal materials, such as low CTE (coefficient of thermal expansion) and directional material stiffness can be artificially adjusted in composite materials to meet the user's requirements. Space-qualified Carbon Fiber Reinforced Plastic (CFRP) composite materials are applied In the FORMOSAT-5 Remote Sensing (RSI) structure because of its light weight and low CTE characteristics. The RSI structural elements include the primary mirror supporting plate, secondary mirror supporting ring, and supporting frame. These elements are designed, manufactured, and verified using composite materials to meet specifications. The structure manufacturing process, detailed material properties, and CFRP structural element validation methods are introduced in this paper.
As a preliminary study for the future worldwide direct mapping of the open ocean tide with satellites equipped with precision altimeters we conducted a simulated study using sets of artificially generated altimeter data constructed from a realistic geoid and four pairs of major tides (O1‐Q1, M2‐N2, K1‐P1, and S2‐K2) in the northeastern Pacific Ocean. Recovery of the original geoid and eight tidal maps is accomplished by a space‐time, least squares harmonic analysis scheme. The resultant maps appear fairly satisfactory even when random noises up to ±100 cm are added to the altimeter data of sufficient spacetime density. The method also produces a refined geoid which is rigorously corrected for the dynamic tides.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.