To reduce the influence of hull deformation to the data of TT&C shipborne outer-trajectory measuring equipments

hull deformation correction mathematical model needs to be established. Firstly

in this paper

the basic structure

measurement principle and measurement elements of hull deformation measurement system are briefly introduced; Secondly

hull deformation measurement coordinate system is established; Thirdly

relationship between deformation measurement angles and Euler’s angles is discussed; Finally

hull deformation data processing calculation formula is deduced in detail and data processing mathematical model is presented. Engineering application result shows: the influence of hull deformation to spacecraft initial orbit semi-major axis “a” is comparatively greater

to near earth and near circular orbit

the influence is hundreds of meters magnitude

whose maximum value is 800-900m; as to big elliptical orbit

the influence reaches 20km or higher. However

the influence can be eliminated after hull deformation correction. The established mathematical model reflects the objective law of hull deformation

which can be used to effectively eliminate the influence of hull deformation to measurement data so as to improve data processing precision.