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Authors whose works are in public domain in at least one jurisdiction

List of works by Jörn Helbert

1-50 of 99 results

Scientific goals for the observation of Venus by VIRTIS on ESA/Venus express mission

South-polar features on Venus similar to those near the north pole

scientific article

Report of the COSPAR Mars Special Regions Colloquium

journal article

A dynamic upper atmosphere of Venus as revealed by VIRTIS on Venus Express

scientific article

Recent hotspot volcanism on Venus from VIRTIS emissivity data.

scientific article

Spectroscopic Observations of Mercury's Surface Reflectance During MESSENGER's First Mercury Flyby

scientific article

The low-iron, reduced surface of Mercury as seen in spectral reflectance by MESSENGER

article

Low thermal conductivity boulder with high porosity identified on C-type asteroid (162173) Ryugu

scholarly article

Mercury's hollows: Constraints on formation and composition from analysis of geological setting and spectral reflectance

article

Comparisons of fresh complex impact craters on Mercury and the Moon: Implications for controlling factors in impact excavation processes

article

Spectral emissivity measurements of Mercury's surface indicate Mg- and Ca-rich mineralogy, K-spar, Na-rich plagioclase, rutile, with possible perovskite, and garnet

scholarly article by A.L. Sprague et al published March 2009 in Planetary and Space Science

Global inventory and characterization of pyroclastic deposits on Mercury: New insights into pyroclastic activity from MESSENGER orbital data

article

The MASCOT Radiometer MARA for the Hayabusa 2 Mission

article published in 2016

In-situ high-temperature emissivity spectra and thermal expansion of C2/c pyroxenes: Implications for the surface of Mercury

scholarly article in American Mineralogist, vol. 99 no. 4, April 2014

Creating Habitable Zones, at all Scales, from Planets to Mud Micro-Habitats, on Earth and on Mars

article published in 2007

Constraints on Mercury’s surface composition from MESSENGER and ground-based spectroscopy

article

Long-term optical spectrophotometric monitoring of comet C/1995 O1 (Hale-Bopp)

scientific article published in Astronomy and Astrophysics

Mercury’s Weather-Beaten Surface: Understanding Mercury in the Context of Lunar and Asteroidal Space Weathering Studies

article

Spectral and petrologic analyses of basaltic sands in Ka'u Desert (Hawaii) - implications for the dark dunes on Mars

scientific article published in 2012

Venus Surface Composition Constrained by Observation and Experiment

article

Limits on the burial depth of glacial ice deposits on the flanks of Hecates Tholus, Mars

scholarly article

Thermal structure of Martian soil and the measurability of the planetary heat flow

scholarly article

Highly porous nature of a primitive asteroid revealed by thermal imaging

scientific article published on 16 March 2020

OSS (Outer Solar System): a fundamental and planetary physics mission to Neptune, Triton and the Kuiper Belt

scientific article published on 8 July 2012

Venus surface thermal emission at 1μm in VIRTIS imaging observations: Evidence for variation of crust and mantle differentiation conditions

scholarly article

Mineralogical indicators of Mercury's hollows composition in MESSENGER color observations

article

Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2

scholarly article

VIRTIS emissivity of Alpha Regio, Venus, with implications for tessera composition

article

Mercury’s Surface Composition and Character as Measured by Ground-Based Observations

article

Digging deep for ice in Isidis Planitia—New constraints on subsurface volatile concentrations from thermal modeling

The Berlin emissivity database (BED)

The Planetary Emissivity Laboratory (PEL) at DLR, Berlin

Olivine thermal emissivity under extreme temperature ranges: Implication for Mercury surface

scholarly article by Jörn Helbert et al published June 2013 in Earth and Planetary Science Letters

Venus express: Highlights of the nominal mission

Characterization of asteroid analogues by means of emission and reflectance spectroscopy in the 1- to 100-µm spectral range

A new approach to assessing the burial depth of ground ice deposits and its application to proposed MER landing sites in Isidis Planitia

scholarly article

Mid-infrared spectral variability for compositionally similar asteroids: Implications for asteroid particle size distributions

article

Rotation period of Venus estimated from Venus Express VIRTIS images and Magellan altimetry

article

The emissivity of a fine-grained labradorite sample at typical Mercury dayside temperatures

scholarly article

Determination of a precise rotation period for the Deep Space 1 target, Comet 19P/Borrelly

scholarly article

Surface brightness variations seen by VIRTIS on Venus Express and implications for the evolution of the Lada Terra region, Venus

scholarly article

The dust activity of comet C/1995 O1 (Hale-Bopp) between 3 AU and 13 AU from the Sun

scientific article published in Astronomy and Astrophysics

Mercury's surface and composition to be studied by BepiColombo

article

Visible and near-infrared reflectance spectra of thermally processed synthetic sulfides as a potential analog for the hollow forming materials on Mercury

article published in 2013

Emissivity measurements of analogue materials for the interpretation of data from PFS on Mars Express and MERTIS on Bepi-Colombo

The Mercury Radiometer and Thermal Infrared Spectrometer (MERTIS) for the BepiColombo mission

Remote-Sensing of Planetary Surface Using Infrared Spectroscopy

article published in 2014

MERTIS on BepiColombo: seeing Mercury in a new light

MERTIS−thermal infrared imaging of Mercury: advances in mid-IR remote sensing technology for planetary exploration

Comparison of surface temperatures measured by the Planetary Fourier Spectrometer (PFS) on Mars Express with predictions from the Berlin Mars near Surface Thermal model (BMST) for the BEAGLE 2 landing site in Isidis Planitia