Abstract

The investigation of the Martian atmosphere is of key importance for an understanding of the planets present and past. Passive limb observations of thermal radiation at submillimeter wavelengths in the 320–350-GHz range by use of a state-of-the-art satellite receiver on a low Mars orbit allow important parameters such as the mixing ratios of H2O, HDO, 12CO, 13CO, O3, and H2O2 as well as the thermal profile to be retrieved with high precision and unprecedented vertical range and resolution, providing valuable information for better understanding of the planet’s water cycle, atmospheric dynamics, and photochemistry. The feasibility of these kinds of measurement is demonstrated by means of model simulations based on realistic atmospheric, spectroscopic, and instrumental parameters. Temperature can be retrieved to ∼90 km with half-scale height vertical resolution from single-scan measurements of emission lines of the long-lived species 12CO and 13CO. The global water-vapor distribution can be measured even under dry or wet conditions with good vertical resolution from the surface to ∼45 km, and simultaneous observations of HDO allow useful information on the D/H ratio up to an altitude of ∼30 km to be derived. The sensitivity of the limb-sounding technique also permits information on the photochemically important minor species O3 and H2O2 to be obtained. It is shown that spectral averaging may improve precision, altitude range, and resolution of the retrieved profiles. Other frequency bands are explored, and the 435–465-GHz range is suggested as a possible alternative to the 320–350-GHz range.

© 2005 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Microwave spectroscopy of the Mars atmosphere

D. O. Muhleman and R. T. Clancy
Appl. Opt. 34(27) 6067-6080 (1995)

Remote sensing of the atmosphere of Mars using infrared pressure modulation and filter radiometry

D. J. McCleese, J. T. Schofield, R. W. Zurek, J. V. Martonchik, R. D. Haskins, D. A. Paige, R. A. West, D. J. Diner, J. R. Locke, M. P. Chrisp, W. Willis, C. B. Leovy, and F. W. Taylor
Appl. Opt. 25(23) 4232-4245 (1986)

Optical and radiometric models of the NOMAD instrument part I: the UVIS channel

Ann C. Vandaele, Yannick Willame, Cédric Depiesse, Ian R. Thomas, Séverine Robert, David Bolsée, Manish R. Patel, Jon P. Mason, Mark Leese, Stefan Lesschaeve, Philippe Antoine, Frank Daerden, Sofie Delanoye, Rachel Drummond, Eddy Neefs, Bojan Ristic, José-Juan Lopez-Moreno, Giancarlo Bellucci, and Nomad Team
Opt. Express 23(23) 30028-30042 (2015)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (15)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription