{
  "FILE_FORMAT": 1, 
  "FILE_HEADER_LINES": 4, 
  "X1_FACTOR": 0.001, 
  "Y1_FACTOR": 1e-06, 
  "YEAR_FABRICATION": null, 
  "SURFACE_SHAPE": "elliptical", 
  "FUNCTION": null, 
  "LENGTH": 0.04, 
  "WIDTH": 0.02, 
  "THICK": 0.02, 
  "LENGTH_OPTICAL": 0.032, 
  "SUBSTRATE": "silicon", 
  "COATING": null, 
  "FACILITY": "ESRF", 
  "INSTRUMENT": null, 
  "POLISHING": null, 
  "ENVIRONMENT": null, 
  "SCAN_DATE": null, 
  "PLOT_TITLE_X1": "x(mm)", 
  "PLOT_TITLE_Y1": "Slope (urad)", 
  "CALC_HEIGHT_RMS": null, 
  "CALC_HEIGHT_RMS_FACTOR": null, 
  "CALC_SLOPE_RMS": null, 
  "CALC_SLOPE_RMS_FACTOR": null,
  "ELLIPSE_DESIGN_P": 98.0,
  "ELLIPSE_DESIGN_Q": 0.0755,
  "ELLIPSE_DESIGN_THETA": 3.9e-3,
  "USER_REFERENCE": "design parameter of ellipse: entrance arm 98m; exit arm: 75.5mm; angle of incidence: 3.9mrad",
  "USER_ADDED_BY": "Amparo Vivo",
  "USER_EXAMPLE": "This is an example of user keyword"
}