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  1. GMAT
  2. GMT-7004

NPlate SRP Model Compare Error


    • Type: Bug
    • Status: Resolved (View Workflow)
    • Priority: P1
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: Nav
    • Component/s: Plate
    • Labels:
    • Sprint:
      Active Development


      Using a local build from 9/11/2019, I am testing the NPlate SRP model. See the attached script, NPlate_Propagation_SRP_Model_Compare_Sun_Orbit.

      The script, NPlate_Propagation_SRP_Model_Compare_Sun_Orbit, uses two fictitious s/c, each with a dry mass of 1000 kg., in orbit about the Sun The SimFermi s/c uses a canon-ball SRP model with Cr=2 and SRP area of 500 m^2.

      The Fermi s/c uses the new NPlate SRP model using two plates. The attitude of the s/c is such that the s/c body X axis always points towards the Sun. Plate BP! has full Sun and Plate BP2 has no Sun. The area of Plate BP1 is set to 500 m^2 and the plate is modeled as having a Specular reflection coefficient of 1.0.

      After one day of propagation, I expect the two s/c two have the identical position so that variable Pos_Error is close to 0 but this does not occur.

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