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Measuring nighttime artificial light levels can provide important information about changes in a region's human activity and economic development, but the scientific community has only begun addressing the need for quantifiable nighttime imagery. The Visible Infrared Imaging Radiometer Suite (VIIRS) Day Night Band (DNB) reflects a significant advancement in nighttime image acquisition and improves the nighttime remote sensing data record. Terra Vega, I2R's SI-traceable and portable ground-based integrating sphere, calibrates the DNB and other instruments. Named after Vega, a common reference star for photometric applications, Terra Vega can be rented to improve nighttime satellite imagery almost anywhere.
Terra Vega's features and related services include:
Terra Vega's features and related services include:
SI-traceable VNIR spectrometer to measure source radiance
Point-source illumination to emulate artificial light sources
Remote operation with Wi-Fi or cellular connection
Electrical grid power or battery operation (charge maintained via solar panels)
Lambertian illumination with individual lamp control for increased illumination range
Internal temperature and humidity sensors
Satellite overhead time prediction capability and automated operation
Detachable trailer housing for easy rental, transport and field set-up, with moveable protective window and window covering
VIIRS Image without Terra Vega
VIIRS Image with Terra Vega (Circled)
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