Nevada Test Site Calibration Range and Geometric Calibration

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

Outline • Engineer Sensor For Geometric Stability • Lock Lenses at Infinity Before Calibration • Lab Radiometric Calibration • Terrestrial Geometric Calibration • In Situ Calibration • Calibration Verification NTS PECTRUM MAPPING, LLC

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” PECTRUM MAPPING, LLC

Lens Focus • Lens Focused At Infinity • High Frequency Target At 100 m • Each Lens Adjusted & Pinned PECTRUM MAPPING, LLC

Radiometric Calibration • Lab Tools Include: • Integrating Sphere • Spectralon Panels • Spectral Line Lamps • Lab Processes • Dark Current • Flat Fielding • White Balance PECTRUM MAPPING, LLC

Terrestrial Range PECTRUM MAPPING, LLC

Terrestrial Camera Stations PECTRUM MAPPING, LLC

Bundle Result 1 PECTRUM MAPPING, LLC

Bundle Result 2 PECTRUM MAPPING, LLC

Bundle Result 3 PECTRUM MAPPING, LLC

Bundle Summary PECTRUM MAPPING, LLC

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

Insitu Range Closeup PECTRUM MAPPING, LLC

NTS Calibration Range PECTRUM MAPPING, LLC

NTS Land. Sat PECTRUM MAPPING, LLC

NTS Site PECTRUM MAPPING, LLC

Flight Plan PECTRUM MAPPING, LLC

GPS Trajectory NLV to NTS PECTRUM MAPPING, LLC

GPS Fwd/Rev RMS (NLV) PECTRUM MAPPING, LLC

GPS Fwd/Rev RMS (NTS) PECTRUM MAPPING, LLC

1: 12, 000 Images/Control PECTRUM MAPPING, LLC

1: 12, 000 Flight PECTRUM MAPPING, LLC

1: 18, 000 Images/Control PECTRUM MAPPING, LLC

1: 18, 000 Flight PECTRUM MAPPING, LLC

1: 24, 000 Images/Control PECTRUM MAPPING, LLC

1: 24, 000 Flight PECTRUM MAPPING, LLC

Summary • Digital Cameras Can be Calibrated to Conventional Specifications • Calibrations Are Maintained Over Time • Regional Test Ranges Are Extremely Useful For Calibration and Verification PECTRUM MAPPING, LLC