Daylight in buildings is both aesthetically pleasing and a sustainable means of offsetting costs for space conditioning and electric lighting. However, poor use of daylight can cause glare that impedes worker productivity. Traditional means of predicting lighting levels for indoor spaces through simulation are timeconsuming, which inhibits exploration of daylighting potential in new buildings. ...

The Atmospheric Emitted Radiance Interferometer (AERI) measures downwelling infrared radiance from 550-3000 cm (18.2 – 3.3 μm) at high-spectral-resolution (~ 1 cm) (Knuteson et al. 2004). The original temporal sampling strategy (a 3-min average of sky radiance every 8 min) was chosen to optimize the signal-to-noise in the observations for clear sky applications. Clear-sky AERI observations have...

A field campaign for the vicarious calibration of the instruments ADEOS/AVNIR (Advanced Earth Observing Satellite/Advanced Visible and Near-Infrared Radiometer) and the visible to near-infrared channels of the Ocean Color and Temperature Scanner (OCTS) was conducted based on the reflectance-based method. The results show a not so small difference between the estimated top of atmosphere (ToA) ra...

This paper examines the feasibility of implementing core algorithms from Radiance using a new type ray tracing engine optimized for highly parallel graphics hardware environments. It presents solutions to a number of implementation challenges. First, the Radiance data format is reinterpreted as a set of buffered data arrays compatible with graphics processing unit (GPU) memory. Second, the ray ...

This paper applies plane parallel radiance transport techniques to scattering from vegetation. The leaves, stems, and branches are represented as a volume density of scattering surfaces, depending only on height and the vertical component of the surface normal. Ordinary differential equations are written for the multiply scattered radiance as a function of the height above the ground, with the ...

Atmospheric correction is a difficult procedure due to the complex nature of the atmosphere and yet it should be done with utmost care because it largely determines the usability of the final data. Atmospheric correction is usually done using either empirical or model based method. In this paper a combined method proposed. The proposed method has two phases. In the first phase hyperspectral rad...

The widespread use of self-luminous devices at nighttime (cell-phones, computers, and tablets) raises some reasonable concerns regarding their effects on human physiology. Light-at-night is a known circadian disruptor, particularly at short visible wavelengths, and it seems advisable to have practical tools for tailoring the spectral radiance of these displays. We analyze two possible strategie...

The comparison of recalibrated spectra from the atmospheric emitted radiance interferometer prototype (AERI-00) and lineby-line radiative transfer model (LBLRTM) calculations show much smaller differences in the 800-1200 cm atmospheric -1 window region under “clear conditions” compared with the preliminary calibrated data. Results indicate that the new AERI-00 data is in good agreement with sim...

The stability of radiance measurements taken by the Sky Quality Meter (SQM)was tested under rapidly changing temperature conditions during exposure to a stable light field in the laboratory. The reported radiance was found to be negatively correlated with temperature, but remained within 7% of the initial reported radiance over a temperature range of -15 °C to 35 °C, and during temperature chan...

The long-term goal of “Radiance in a Dynamic Ocean (RaDyO): Radiance and Visibility as Affected by Inherent Optical Properties” is to perform detailed investigations of inherent optical properties (IOPs) and the effects of IOP variability on underwater radiance and visibility. As part of this effort, Sea Engineering, Inc. (SEI) will also provide all data from the Scripps Pier and Santa Barbara ...