@InProceedings{Carlesso:2018:StCaGe,
author = "Carlesso, Franciele",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Study of cavities geometry for absolute radiometer",
booktitle = "Anais...",
year = "2018",
organization = "IAU General Assembly, 30.",
abstract = "The measurement of the Total Solar Irradiance (TSI) and its
variations are very important to understand the influence of Suns
radiant output on the Earths climate. Space-borne instruments have
made TSI measurements continually and allowed advances in the TSI
understanding. These measurements rely on active cavity
radiometers, which use black interior surfaces to absorb incident
sunlight. Black Ni-P was firstly applied in active cavity
radiometers for measuring solar irradiance in TIM (Total
Irradiance Monitor) instrument [1]. The development of an absolute
radiometer is currently been done at INPE. We obtained black Ni-P
by electroless deposition for application in the interior of the
silver cavities. We used bidirectional reflectance distribution
function (BRDF) data to describe the surface reflectance
properties of the Ni-P film. The BRDF data were used in the
geometry study of the absorber cavity in a ray tracing software -
ZEMAX. These measures allowed cavities geometries optimization
considering the characteristics of the black Ni-P produced at
INPE. We intend to use this cavity in a bench prototype radiometer
under development. The current status of the study and obtained
results are presented in detail.[1] G. Kopp, Journal of Space
Weather and Space Climate, 4, A14 (2014).",
conference-location = "Vienna, Austria",
conference-year = "20-31 aug.",
language = "pt",
urlaccessdate = "27 abr. 2024"
}