1. Nevada Test Site Calibration Range and Geometric Calibration of Digital Cameras ISPRS I/2 Bob Kletzli Spectrum Mapping, LLC December 2-4, 2003

2. Outline Engineer Sensor For Geometric Stability
Lock Lenses at Infinity Before Calibration
Lab Radiometric Calibration
Terrestrial Geometric Calibration
In Situ Calibration
Calibration Verification NTS

3. Geometric Stability CDD Fixed To Milled Optical Bench
Lens Receptacle Is Opposite Side
Each Lens Fixed To Aluminum Socket
Lenses Are Interchangeable
Alignment Pins Eliminate Rotation
TEC Surrounds CCD
“Shake and Bake”

4. Lens Focus Lens Focused At Infinity High Frequency Target At 100m
Each Lens Adjusted & Pinned

5. Radiometric Calibration
Lab Tools Include:
Integrating Sphere
Spectralon Panels
Spectral Line Lamps
Lab Processes
Dark Current
Flat Fielding
White Balance

6. Terrestrial Range

7. Terrestrial Camera Stations

8. Bundle Result 1

9. Bundle Result 2

10. Bundle Result 3

11. Bundle Summary

12. Insitu Range (NM) 400+ points by RTK 2-3 cm accuracy
Photo Identifiable
Variable terrain
Used for both laser & photography
Building corners surveyed

13. Insitu Range Closeup

14. NTS Calibration Range

15. NTS LandSat

16. NTS Site

17. Flight Plan

18. GPS Trajectory NLV to NTS

19. GPS Fwd/Rev RMS (NLV)

20. GPS Fwd/Rev RMS (NTS)

21. 1:12,000 Images/Control

22. 1:12,000 Flight

23. 1:18,000 Images/Control

24. 1:18,000 Flight

25. 1:24,000 Images/Control

26. 1:24,000 Flight

27. Summary
Digital Cameras Can be Calibrated to Conventional Specifications
Calibrations Are Maintained Over Time
Regional Test Ranges Are Extremely Useful For Calibration and Verification