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  • Article
  • Open Access

Solar radiation pressure model for the relay satellite of SELENE

Earth, Planets and Space201451:BF03351568

  • Received: 12 April 1999
  • Accepted: 7 September 1999
  • Published:


A new radiation pressure model of the relay satellite of SELENE has been developed. The shape of the satellite was assumed to be a combination of a regular octagonal pillar and a column. Radiation forces acting on each part of the spacecraft were calculated independently and summed vectorially to obtain the mean acceleration of the satellite center of mass. We incorporated this new radiation pressure model into the orbit analysis software GEODYN-II and simulated the tracking data reduction process of the relay satellite. We compared two models: one is the new radiation pressure model developed in this work and the other a so-called “cannonball model” where the shape of the satellite is assumed to be a sphere. By the analysis of simulated two-way Doppler tracking data, we found that the new radiation pressure model reduces the observation residuals compared to the cannonball model. Moreover, we can decrease errors in the estimated lunar gravity field coefficients significantly by use of the new radiation pressure model.


  • Radiation Pressure
  • Tracking Data
  • Radiation Force
  • Spin Axis
  • Solar Radiation Pressure