Design and test of autonomous scientific payloads for sounding balloons

Bettanini, C.; Fiorentin, P.; Dumitriu, A; E., E. Conte; Accatino, F; Cagnato, Enrico; Kahol, O; Ghedin, M; Celadin, D; Magro, N; Bedendo, M; Aboudan, A.; Colombatti, Giacomo

doi:10.1109/metroaerospace48742.2020.9160172

Cited by 2 publications

(2 citation statements)

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“…The angular error caused by the time shift may be constant or time variable. It can be obtained from the difference of the sky brightness according to Equations ( 27) and (28). Two examples are presented in Figure 5, they correspond to the SQMs at Pennar and Ekar observatories.…”

Section: Approaches To the Data Analysismentioning

confidence: 99%

“…The sky brightness is measured directly from land by single radiometers and by radiometers forming networks, examples are described in [17,18] or by RGB cameras, which allow measuring the spatial distribution of the sky glow and the colour of the light, two cases are presented in [19,20]. Measurements from the sky are performed by plane [21][22][23], drones and sounding balloons [24][25][26][27][28] too, they allow analysing the light polluting sources, directly. For wider areas, satellites provide upward irradiance measurements [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Long-Time Trends in Night Sky Brightness and Ageing of SQM Radiometers

et al. 2022

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A very wide-used instrument for the measurement of the Night Sky Brightness (NSB) is the Sky Quality Meter (SQM). One of its important issues is tracking NSB for long time and connecting its variations to changes in outdoor lighting. The stability of these radiometers is fundamental; variation on the instrument behaviour could be confused with changes of the sky brightness. The SQMs of the network of the Veneto Region (Italy) and the SQM installed at La Silla (Chile) are analysed by using the twilight method considering both sunset and dawn measurements, which allows to compensate for shifts in the SQM internal clock. The slope of the observed long-term trends ranges between 29 ± 5 and 86 ± 22 mmagSQM arcsec−2 year−1. These high values require a correction of the measurements to continue to track NSB by those instruments. The correction is presented for an Italian site, for example: raw measures show an apparent trend towards darker sky (30 ± 5 mmagSQM arcsec−2 year−1), after the correction a clear tendency towards a brighter polluted sky appears (−21 ± 8 mmagSQM arcsec−2 year−1), in agreement with the estimated trend of the installed luminous flux of outdoor lighting for that area.

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Section: Approaches To the Data Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long-Time Trends in Night Sky Brightness and Ageing of SQM Radiometers

et al. 2022

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Analysis of the Spectral Sensitivity of Luxmeters and Light Sensors of Smartphones in Terms of Their Influence on the Results of Illuminance Measurements—Example Cases

Tabaka

Wtorkiewicz

2022

Energies

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The article presents spectral sensitivity curves of 22 typical luxmeters and 3 smartphones as a result of laboratory measurements. Based on the measurement data, errors in the spectral correction of the considered instruments and devices were calculated. Due to the fact that the value of the measured illuminance is influenced by the spectral characteristics of the radiation, in order to determine the spectral corrections coefficients, 10 light sources with different spectral distributions of radiation were taken into account. Spectral corrections factors were determined using two methods for all luxmeters and smartphones. This paper presents the relationship between the shape of the spectral sensitivity curves of a given luxmeter and the measured values of f’1 errors. Moreover, the limitations related to the use of spectral corrections in environmental measurements with the use of a luxmeter were demonstrated.

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Design and test of autonomous scientific payloads for sounding balloons

Cited by 2 publications

References 13 publications

Long-Time Trends in Night Sky Brightness and Ageing of SQM Radiometers

Long-Time Trends in Night Sky Brightness and Ageing of SQM Radiometers

Analysis of the Spectral Sensitivity of Luxmeters and Light Sensors of Smartphones in Terms of Their Influence on the Results of Illuminance Measurements—Example Cases

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