Thermal mapping of surface waters and the land via UAVs offers exciting opportunities in many scientific disciplines; however, unresolved issues persist related to accuracy drift uncooled microbolometric thermal infrared (TIR) sensors. Curiously, most commercially available UAV-based TIR sensors are black, which will theoretically facilitate heating sensor absorbed solar radiation. Accordingly,...

Abstract We present a cryogenic method for testing of thermal radiative properties materials commonly used in ground-based systems as well space probes. It is possible to measure total hemispherical emissivity or absorptivity metallic dielectric surfaces (0.1% - 100%) the range temperatures from 10 K up 320 source radiation. Emissivity control coatings probe JUICE are presented together with ot...

Since 2001, there have been two, parallel interpretations of Mars Global Surveyor Thermal Emission Spectrometer (TES) observations of Sinus Meridiani, which are: (1) coarse hematite is the only spectral match; and (2) fine-grained hematite with particles closer than ~wavelength (“fine-intimate hematite”, e.g., coating, ferricrete) is a better match, but coarse hematite is also viable. The TES t...

An extraordinary light harvesting property of a periodic nano-pyramid array is reported. It is found that the nano-pyramid array can absorb light efficiently with an average absorptivity of 0.998 over the whole visible waveband. The ultra-high absorption is independent of the incoming light on polarization state and insensitive within a broad angle range. We attribute the efficient light harves...

A sensitive spectrophotometric method for the determination of trace amounts of chromium(VI) is described. Chromium(VI) forms chlorochromate anion in the presence of acid and chloride ion. The formed anion is extracted in toluene as ion-pair with a cationic dye rhodamine 6G. At 535 nlll absorption maximum molar absorptivity is 2x104 I mol-I em-I. The colour is stable for 4 h and the system obey...