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Laan, E. (author), Stam, D. (author), Snik, F. (author), Karalidi, T. (author), Keller, C. (author), ter Horst, R. (author), Navarro, R. (author), Oomen, G. (author), de Vries, J. (author), Hoogeveen, R. (author), TNO Industrie en Techniek (author)SPEX (Spectropolarimeter for Planetary EXploration) is an innovative, compact remotesensing instrument for measuring and characterizing aerosols in the atmosphere. The shoebox size instrument is capable of accurate full linear spectropolarimetry without moving parts or liquid crystals. High precision polarimetry is performed through encoding the...conference paper 2017
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ter Horst, R. (author), de Haan, M. (author), Gubbels, G.P.H. (author), Senden, R. (author), van Venrooy, B.W.H. (author), Hoogstrate, A.M. (author)For years now conventional aluminium 6061 T6 has widely been used for mirrors in astronomical instruments, being diamond turned or since a few years also being optically polished. This allows the development of optical systems that can be tested and operated at any temperature, without being affected by CTE effects. Using traditional aluminium...conference paper 2012
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van Harten, G. (author), Snik, F. (author), Rietjens, J.H.H. (author), Smit, J.M. (author), de Boer, J. (author), Diamantopoulou, R. (author), Hasekamp, O.P. (author), Stam, D.M. (author), Keller, C.U. (author), Laan, E.C. (author), Verlaan, A.L. (author), Vliegenthart, W.A. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author), Hannemann, S. (author), Moon, S.G. (author), Voors, R. (author)We present the Spectropolarimeter for Planetary EXploration (SPEX), a high-accuracy linear spectropolarimeter measuring from 400 to 800 nm (with 2 nm intensity resolution), that is compact (~ 1 liter), robust and lightweight. This is achieved by employing the unconventional spectral polarization modulation technique, optimized for linear...conference paper 2011
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Voors, R. (author), Moon, S.G. (author), Hannemann, S. (author), Rietjens, J.H.H. (author), van Harten, G. (author), Snik, F. (author), Smit, M. (author), Stam, D.M. (author), Keller, C.U. (author), Laan, E.C. (author), Verlaan, A.L. (author), Vliegenthart, W.A. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author)SPEX (Spectropolarimeter for Planetary Exploration) was developed in close cooperation between scientific institutes and space technological industries in the Netherlands. It is used for measuring microphysical properties of aerosols and cloud particles in planetary atmospheres. SPEX utilizes a number of novel ideas. The key feature is that full...conference paper 2011
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Rieetjens, J.H.H. (author), Snik, F. (author), Stam, D.M. (author), Smit, J.M. (author), van Harten, G. (author), Keller, C.U. (author), Verlaan, A.L. (author), Laan, E.C. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author), Moon, S.G. (author), Voors, R. (author), TNO Industrie en Techniek (author)We present SPEX, the Spectropolarimeter for Planetary Exploration, which is a compact, robust and low-mass spectropolarimeter designed to operate from an orbiting or in situ platform. Its purpose is to simultaneously measure the radiance and the state (degree and angle) of linear polarization of sunlight that has been scattered in a planetary...conference paper 2010
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Snik, F. (author), Rietjens, J.H.H. (author), van Harten, G. (author), Stam, D.M. (author), Keller, C.U. (author), Smit, J.M. (author), Laan, E.C. (author), Verlaan, A.L. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author), Moon, S.G. (author), Voors, R. (author)SPEX (Spectropolarimeter for Planetary EXploration) is an innovative, compact instrument for spectropolarimetry, and in particular for detecting and characterizing aerosols in planetary atmospheres. With its ∼1-liter volume it is capable of full linear spectropolarimetry, without moving parts. The degree and angle of linear polarization of the...conference paper 2010
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Division of Technology for Society (author), Snik, F. (author), Karalidi, T. (author), Keller, C. (author), Laan, E. (author), ter Horst, R. (author), Navarro, R. (author), Stam, D. (author), Aas, C. (author), de Vries, J. (author), Oomen, G. (author), Hoogeveen, R. (author)SPEX (Spectropolarimeter for Planetary EXploration) is an innovative, compact remote-sensing instrument for detecting and characterizing aerosols. With its 1-liter volume it is capable of full linear spectropolarimetry, without moving parts. High precision polarimetry is performed through encoding the degree and angle of linear polarization of...conference paper 2008