127 citations · 579 across the 19 of their papers we have counts for
21 papers
Characterisation of night-time outdoor lighting in urban centres using cluster analysis of remotely sensed light emissions
Máximo Bustamante-Calabria, Susana Martín-Ruiz, Alejandro Sánchez de Miguel +3
Evidence of the negative impact of light pollution on ecosystems is increasing every year. Its monitoring and study requires the identification, characterisation and control of the…
Photometric Catalogue for Space and Ground Night-Time Remote-Sensing Calibration: RGB Synthetic Photometry from Gaia DR3 Spectrophotometry
J. M. Carrasco, N. Cardiel, E. Masana +5
Recent works have made strong efforts to produce standardised photometry in RGB bands. For this purpose, we carefully defined the transmissivity curves of RGB bands and defined a s…
Citizen Science to Assess Light Pollution with Mobile Phones
Gorka Muñoz-Gil, Alexandre Dauphin, Federica A. Beduini +1
The analysis of the colour of artificial lights at night has an impact on diverse fields, but current data sources have either limited resolution or scarce availability of images f…
Importance of the time acquisition difference between DMSP/OLS and SNPP/VIIRS/DNB and the RAW trends in Europe
Alejandro Sánchez de Miguel, Sara Krupansky
Using the SNPP-VIIRS/DNB and the DMSP-OLS it is possible to have an idea of the evolution of the light pollution until the LEDs started to appear massively. Another of the issues o…
Pros and cons of gaussian filters versus step filters for light pollution monitoring
Alejandro Sánchez de Miguel
There is debate about which indicators should currently be used to monitor levels of artificial light pollution. To be most valuable, methods need to be sensitive to variation in t…
Colour remote sensing of the impact of artificial light at night (II): Calibration of DSLR-based images from the International Space Station
Alejandro Sánchez de Miguel, Jaime Zamorano, Martin Aubé +6
Nighttime images taken with DSLR cameras from the International Space Station (ISS) can provide valuable information on the spatial and temporal variation of artificial nighttime l…
RGB photometric calibration of 15 million Gaia stars
Nicolás Cardiel, Jaime Zamorano, Josep Manel Carrasco +6
Although a catalogue of synthetic RGB magnitudes, providing photometric data for a sample of 1346 bright stars, has been recently published, its usefulness is still limited due to…
Synthetic RGB photometry of bright stars: definition of the standard photometric system and UCM library of spectrophotometric spectra
Nicolás Cardiel, Jaime Zamorano, Salvador Bará +10
Although the use of RGB photometry has exploded in the last decades due to the advent of high-quality and inexpensive digital cameras equipped with Bayer-like color filter systems,…
Effects of the COVID-19 lockdown on urban light emissions: ground and satellite comparison
Máximo Bustamante-Calabria, Alejandro Sánchez de Miguel, Susana Martín-Ruiz +7
'Lockdown' periods in response to COVID-19 have provided a unique opportunity to study the impacts of economic activity on environmental pollution (e.g. NO, aerosols, noise, li…
Direct assessment of the sensitivity drift of SQM sensors installed outdoors
Salvador Bará, Enric Marco, Salvador J. Ribas +3
Long-term monitoring of the evolution of the artificial night sky brightness is a key tool for developing science-informed public policies and assessing the efficacy of light pollu…
Balloon-borne video observations of Geminids 2016
Francisco Ocaña, Alejandro Sánchez de Miguel, ORISON team +1
We investigate the observation of meteors with video cameras in stratospheric balloons, overcoming tropospheric handicaps like weather and extinction. We have studied the practical…
The nature of the diffuse light near cities detected in nighttime satellite imagery
Alejandro Sánchez de Miguel, Christopher C. M. Kyba, Jaime Zamorano +2
Diffuse glow has been observed around brightly lit cities in nighttime satellite imagery since at least the first publication of large scale maps in the late 1990s. In the literatu…
Estimating the relative contribution of streetlights, vehicles and residential lighting to the urban night sky brightness
Salvador Bará, Ángel Rodríguez-Arós, Marcos Pérez +4
Under stable atmospheric conditions, the zenithal brightness of the urban sky varies throughout the night following the time course of the anthropogenic emissions of light. Differe…
Sky Quality Meter measurements in a colour changing world
A. Sánchez de Miguel, M. Aubé J. Zamorano, M. Kocifaj +2
The Sky Quality Meter (SQM) has become the most common device to track the evolution of the brightness of the sky from polluted regions to first class astronomical observatories. A…
Low cost multi-purpose balloon-borne platform for wide-field imaging and video observation
Francisco Ocaña, Alejandro Sánchez de Miguel, Aitor Conde +1
Atmosphere layers, especially the troposphere, hinder the astronomical observation. For more than 100 years astronomers have tried observing from balloons to avoid turbulence and e…
On the frequency of the superfireballs: more than 150 years of reports
Sandra Zamora, Fancisco Ocaña, Alejandro Sánchez de Miguel +1
Superfireballs are rare phenomena for which the reports are scarce and the estimation of their abundance has a huge margin of uncertainty. As a citizen science project we have gath…
Orbits and emission spectra from the 2014 Camelopardalids
José M. Madiedo, Josep M. Trigo-Rodríguez, Jaime Zamorano +9
We have analyzed the meteor activity associated with meteoroids of fresh dust trails of Comet 209P/LINEAR, which produced an outburst of the Camelopardalid meteor shower (IAU code…
Evolution of the energy consumed by street lighting in Spain estimated with DMSP-OLS data
Alejandro Sánchez de Miguel, Jaime Zamorano, José Gómez Castaño +1
We present the results of the analysis of satellite imagery to study light pollution in Spain. Both calibrated and non-calibrated DMSP-OLS images were used. We describe the method…
Analysis of a superbolide from a Damocloid observed over Spain on July 13, 2012
Jose M. Madiedo, Josep M. Trigo-Rodriguez, Jaime Zamorano +15
A superbolide with an estimated absolute magnitude of -20+-1 was seen on July 13, 2012 over the center and south of Spain. This extraordinary event, which was witnessed by numerous…
The 2011 October Draconids outburst. I. Orbital elements, meteoroid fluxes and 21P/Giacobini-Zinner delivered mass to Earth
Josep M. Trigo-Rodríguez, José M. Madiedo, I. P. Williams +17
On October 8th, 2011 the Earth crossed the dust trails left by comet 21P/Giacobini-Zinner during its XIX and XX century perihelion approaches with the comet being close to periheli…
Light pollution in Spain. An european perspective
Alejandro Sanchez de Miguel, Jaime Zamorano
Spain appears in light pollution maps as a country less polluted than their neighbours in the European Union. This seems to be an illusion due to its low population density. The da…