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ISO LWS Observations of Mars - Detection of Rotational Modulation in the Far Infrared

Sidher, S. D., Griffin, Matthew Joseph, Davies, G. R., Swinyard, B. M., Burgdorf, M., Orton, G. S., Rudy, D. S., Encrenaz, Th., Lellouch, E. and de Graauw, Th. 2000. ISO LWS Observations of Mars - Detection of Rotational Modulation in the Far Infrared. Icarus 147 (1) , pp. 35-41. 10.1006/icar.2000.6436

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A series of far infrared (FIR) spectra of Mars between 43 and 196 μm was taken with the Long Wavelength Spectrometer (LWS) on board the European Space Agency's Infrared Space Observatory (ISO). Analysis of these medium-resolution data reveals a rotational modulation of the disk-averaged FIR brightness temperature. The observed variability of ±1.5% in the LWS wavelength range compares favorably with the predictions of a thermophysical model of the martian surface. A surface emissivity of ∼0.90 gives good agreement between the measured and the modeled brightness temperatures and leads to an improved estimate of the LWS photometric calibration uncertainty.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Elsevier Science
ISSN: 0019-1035
Last Modified: 04 Jun 2017 02:12

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