Fig.1

b.) Center of tunnel: Belt on+B.L. suct. on

STD-VALUES

   --X_STD--    --Y_STD-- --X_ERRORBAR--
  0.98886104   1.50000000   0.01019534
  0.99174948  11.30000000   0.01019534
  1.00021451  31.30000000   0.01019534
  0.99984512  31.50000000   0.01019534
  1.00372276  51.50000000   0.01019534
  1.00771280 101.50000000   0.01019534
  1.00859399 151.50000000   0.01019534
  1.01077907 216.50000000   0.01019534
