code: def _get_ind_from_H(H):
          r'''Method defined in the US Standard Atmosphere 1976 for determining
          the index of the layer a specified elevation is above. Levels are 
          0, 11E3, 20E3, 32E3, 47E3, 51E3, 71E3, 84852 meters respectively.
          '''
          if H <= 0:
              return 0
          for ind, Hi in enumerate(H_std):
              if Hi >= H :
                  return ind-1
          return f _get_ind_from_H(H):
          r'''Method defined in the US Standard Atmosphere 1976 for determining
          the index of the layer a specified elevation is above. Levels are 
          0, 11E3, 20E3, 32E3, 47E3, 51E3, 71E3, 84852 meters respectively.
          '''
          if H <= 0:
              return 0
          for ind, Hi in enumerate(H_std):
              if Hi >= H :
                  return ind-1
          return 7
docs: r'''Method defined in the US Standard Atmosphere 1976 for determining
          the index of the layer a specified elevation is above. Levels are 
          0, 11E3, 20E3, 32E3, 47E3, 51E3, 71E3, 84852 meters respectively.