Disk-averaged synthetic spectra of Mars.

  title={Disk-averaged synthetic spectra of Mars.},
  author={Giovanna Tinetti and Victoria S. Meadows and David Crisp and William Fong and Thangasamy Velusamy and Heather Snively},
  volume={5 4},
The principal goal of the NASA Terrestrial Planet Finder (TPF) and European Space Agency's Darwin mission concepts is to directly detect and characterize extrasolar terrestrial (Earthsized) planets. This first generation of instruments is expected to provide disk-averaged spectra with modest spectral resolution and signal-to-noise. Here we use a spatially and spectrally resolved model of a Mars-like planet to study the detectability of a planet's surface and atmospheric properties from disk… 
Detectability of planetary characteristics in disk-averaged spectra. I: The Earth model.
A spatially and spectrally resolved model of the Earth is developed and comparison between the data and model indicates that several atmospheric species can be identified in disk-averaged Earth spectra, and potentially detected depending on the wavelength range and resolving power of the instrument.
Characterizing Extrasolar Terrestrial Planets with Reflected, Emitted and Transmitted Spectra
  • G. Tinetti
  • Geology, Physics
    Origins of Life and Evolution of Biospheres
  • 2006
Simulations have used spatially and spectrally-resolved models to explore the observational sensitivity to changes in atmospheric and surface properties, and the detectability of surface biosignatures, in the globally averaged spectra and light-curves of the Earth.
Detectability of planetary characteristics in disk-averaged spectra II: synthetic spectra and light-curves of earth.
Modeling the disk-averaged sensitivity to the "red-edge," a distinctive spectral signature of vegetation, showed that Earth's land vegetation could be seen in disk-aversaged spectra, even with cloud cover, when the signal was averaged over the daily time scale.
Mid-Infrared Properties of Disk Averaged Observations of Earth with AIRS
We have investigated mid-infrared spectra of Earth obtained by the Atmospheric Infrared Sounder (AIRS) instrument on-board the AQUA spacecraft to explore the characteristics that may someday be
Evolved Climates and Observational Discriminants for the TRAPPIST-1 Planetary System
The TRAPPIST-1 planetary system provides an unprecedented opportunity to study terrestrial exoplanet evolution with the James Webb Space Telescope (JWST) and ground-based observatories. Since M dwarf
Biomarkers in the transmission spectrum of Earth-size transiting planets
A variety of terrestrial planets with different physical parameters and exotic atmospheres might plausibly exist outside our Solar System, waiting to be detected by the next generation of
Darwin--a mission to detect and search for life on extrasolar planets.
A mission to detect rocky planets similar to Earth and perform spectroscopic analysis at mid-infrared wavelengths, where an advantageous contrast ratio between star and planet occurs, which will ignite intense interest in both the research community and the wider public.
High-resolution Spectral Discriminants of Ocean Loss for M-dwarf Terrestrial Exoplanets
In the near future, extremely large ground-based telescopes may conduct some of the first searches for life beyond the solar system. High spectral resolution observations of reflected light from
Atmosphere and Spectral Models of the Kepler-field Planets HAT-P-7b and TrES-2
We develop atmosphere models of two of the three Kepler-field planets that were known prior to the start of the Kepler mission (HAT-P-7b and TrES-2). We find that published Kepler and Spitzer data
The next generation of ground- and space-based telescopes will image habitable planets around nearby stars. A growing literature describes how to characterize such planets with spectroscopy, but less


Sensitivity to environmental properties in globally averaged synthetic spectra of Earth
We are using computer models to explore the observational sensitivity to changes in atmospheric and surface properties, and the detectability of biosignatures, in the globally averaged spectrum of
The Terrestrial Planet Finder
  • P. Lawson
  • Physics, Geology
    2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)
  • 2001
The Terrestrial Planet Finder (TPF) is a space-based astronomical telescope that will combine high sensitivity and spatial resolution to detect and characterize /spl sim/150 planetary systems within
Remote sensing of planetary properties and biosignatures on extrasolar terrestrial planets.
It is found that both the mid-IR and the visible to near-IR wavelength ranges offer valuable information regarding biosignatures and planetary properties; therefore both merit serious scientific consideration for TPF and Darwin.
Mars surface mineralogy from Hubble Space Telescope imaging during 1994–1995: Observations, calibration, and initial results
Visible to near-infrared observations of Mars were made with the Hubble Space Telescope (HST) during 1994–1995 with the goals of monitoring seasonal variability of the surface and atmosphere and
The 2.4– spectrum of Mars observed with the infrared space observatory
New composite reflectance spectra of Mars from 0.4 to 3.14 μm
To verify the quality and accuracy of Phobos-2 Imaging Spectrometer for Mars (ISM) spectra of Mars, we have performed comparisons with telescopic data obtained contemporaneously and which have
The HARPS survey for southern extra-solar planets. II. A 14 Earth-masses exoplanet around μ Arae
In this letter we present the discovery of a very light planetary companion to the star mu Ara (HD160691). The planet orbits its host once every 9.5days, and induces a sinusoidal radial velocity
A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436
We report precise Doppler measurements of GJ 436 (M2.5 V) obtained at Keck Observatory. The velocities reveal a planetary companion with orbital period of 2.644 days, eccentricity of 0.12 (consistent
Mars aerosol studies with the MGS TES emission phase function observations: Optical depths, particle sizes, and ice cloud types versus latitude and solar longitude
[1] Emission phase function (EPF) observations taken in 1999–2001 by Mars Global Surveyor Thermal Emission Spectrometer (MGS TES) support the broadest study of Martian aerosol properties to date. TES