Mapping the Melatonin Suppression, Star Light and Induced Photosynthesis Indices with the LANcube

Aubé, Martin; Marseille, Charles; Farkouh, Amar; Dufour, Adam; Simoneau, Alexandre; Zamorano, J.; Roby, Johanne; Tapia, C.

doi:10.3390/rs12233954

Cited by 12 publications

(13 citation statements)

References 24 publications

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“…That experiment will require the measurement of the irradiance on a set of sites for which we computed the Illumina v2 irradiance spectra. We are expecting to perform that experiment with the LANcube radiometer [46] in the coming year.…”

Section: Discussionmentioning

confidence: 99%

Evaluating the Potential Health Impact of Obtrusive Light: Application to Montréal, Canada

Aubé¹,

Houle²,

J³

et al. 2021

Preprint

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This paper describes the use of a new obtrusive light module of the Illumina v2 model to estimate the light that may enter bedroom windows. We used as input to the model, 1- the sources’ flux and spectrum derived from the color images taken by astronauts from the international space station, 2- an association between source spectrum and angular emission, and 3- a per zone inventory of obstacles properties and lamp height. The model calculate the spectral irradiance incident to buildings’ windows taking into account for the orientation of the street. By using the color information from an ISS image, we can classify pixels as a function of their spectra. With the same image, it is also possible to determine the upward photopic radiance for each pixel. Both serve as inputs to the model to calculate the spectral irradiance on any window. By having the spectral irradiance, it is possible to determine the Melatonin Suppression Index and the photopic irradiance on the window. Such information can later be used to perform epidemiological studies. The new methodology is applied to the case of Montréal in Canada for a set of houses’ locations. The computations are made for 2013 (pre-LED era).

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Section: Discussionmentioning

confidence: 99%

Evaluating the Potential Health Impact of Obtrusive Light: Application to Montréal, Canada

Aubé¹,

Houle²,

J³

et al. 2021

Preprint

Self Cite

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“…To determine the spectral type, we make use of the color ratios relatives to the green channel in order to determine the coordinate of the lighting device in a 3D color space defined by the red/green, blue/green and infrared/green color ratios (r/g, b/g and i/g). r, g, b and i are derived from the raw red, green, blue and clear (R,G,B,C) LANcube channels as explained in [8]. Basically, we first use the sum of the 3 colors and the clear channel to get an estimate of the near infrared (i).…”

Section: Lighting Devices Spectral Type Recognitionmentioning

confidence: 99%

“…Ideally, the measuring devices must be multispectral and multiangular. In the present work, we describe the use of such a sensor called LANcube [8].…”

Section: Introductionmentioning

confidence: 99%

Building Lighting Device Inventories with the LANcube v2 Open Source Multiangular Radiometer

Aubé¹,

Houle²

2022

Preprint

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This paper describes the use of an open source instrument called LANcube v2 to build a lighting device inventory. The LANcube v2 is and instrument having 5 color sensitive sensors, each on a face of a cube. The instrument can be mounted on a car roof in order to create a map of the artificial light at night while roaming the streets and roads. Based on the temporal variations of the detected signal on various cube’s faces, we developed a method of finding the position in 3D of each lighting device. The lamp spectral types can be determined thanks to the color balance of the raw Red (R) Green (G) Blue (B) and Clear (C) color bands. If one assumes a typical angular photometry of a lighting device with respect to its location, it is possible to estimate its luminous flux. Such information allows us to build a lighting devices inventory of a territory. One advantage of that new method is that it can provide information about the private lighting devices that are always excluded from public lighting inventories. We will compare the inventory extracted with that new methodology with an in situ lamp inventory made for two villages in Canada. This will allow us to emphasize the strengths and limitations of the method by comparing to the ground truth.

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“…It has been proved that the exposure to artificial light at night (ALAN) can induce negative impacts on both biodiversity 1 , 2 and human health 3 , 4 . The emission of artificial light into the nocturnal environment induces harmful consequences on many nocturnal and diurnal species, like bats 5 , insects 6 , toads 7 , fishes 8 or birds 9 .…”

Section: Introductionmentioning

confidence: 99%

Towards an absolute light pollution indicator

Deverchère¹,

Vauclair²,

Bosch³

et al. 2022

Sci Rep

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The growing concern about the negative impact of artificial light at night on biodiversity and human health increases the need of defining a general indicator that could be used for characterizing light pollution as well as performing both spatial and temporal comparisons. In this paper, we show that the traditional indicators based on direct numerical measurements of sky brightness suffer from significant limitation due to calibration bias and lack of reproducibility. Furthermore, these measures are most often performed in periods of clear sky. They do not reflect the wide variety of meteorological conditions that can produce highly inhomogeneous levels of light pollution on a given site. To overcome these issues, we propose a statistical indicator called NSB Dispersion Ratio. This indicator is derived from a statistically significant number of individual night sky brightness measurements, under various meteorological conditions. It is independent of any absolute photometer calibration. It only requires on-time precise corrections of the contribution of natural light sources such as the Galactic plane.

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Mapping the Melatonin Suppression, Star Light and Induced Photosynthesis Indices with the LANcube

Cited by 12 publications

References 24 publications

Evaluating the Potential Health Impact of Obtrusive Light: Application to Montréal, Canada

Evaluating the Potential Health Impact of Obtrusive Light: Application to Montréal, Canada

Building Lighting Device Inventories with the LANcube v2 Open Source Multiangular Radiometer

Towards an absolute light pollution indicator

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