sarproz-group

Incidence Angle

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    • #7019
      nkguinn
      Participant

        What is the convention for measuring the Incidence Angle that appears in AcqIncAngle in the dataset description? For example, is this angle measured from the north? Is positive clockwise?

      • #7020
        avelasco
        Participant

          “The incidence angle is defined as the angle between the vertical direction and the radar wave propagation vector at the surface (as shown in Fig. 1-3). When surface curvature effects are neglected, the look angle is equal to the incidence angle at the surface when the surface is flat.” Nothing to do with the North.
          https://descanso.jpl.nasa.gov/SciTechBook/series2/02Chap1_110106_amf.pdf

          • This reply was modified 1 year, 7 months ago by avelasco.
        • #7024
          nkguinn
          Participant

            I have a similar question for heading angle, for AcqHeading in the dataset description. Why are the angles negative?

          • #7027
            periz
            Keymaster

              please search the forum before posting questions
              https://www.sarproz.com/groups/sarproz-group/forum/topic/orbit-heading/

            • #7032
              nkguinn
              Participant

                I read that post but didn’t really understand it. If my AcqHeading in SARPROZ is -11, then according to the previous post, on a 360 degree circle, that would correspond to 169?

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