L.H. Svedhem
6 records found
1
Authored
First Results of Mars Express
ExoMars Trace Gas Orbiter Mutual Radio Occultation
Spacecraft-to-spacecraft radio occultations experiments are being conducted at Mars between Mars Express (MEX) and Trace Gas Orbiter (TGO), the first ever extensive inter-spacecraft occultations at a planet other than Earth. Here we present results from the first 83 such occultat
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Despite the growing importance of planetary Space Weather forecasting and radiation protection for science and robotic exploration and the need for accurate Space Weather monitoring and predictions, only a limited number of spacecraft have dedicated instrumentation for this pu ...
Aerobraking is an effective technique to save significant
amounts of fuel while lowering an orbit around a planet. It was first
applied by NASA at Venus, with Magellan during its extended mission, in
1993. The first aerobraking at Mars was done, also by NASA, with Mars
Global
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Contributed
With a continuously growing number of satellites in orbit, it becomes increasingly important to assess their impacts on the Earth's environment in a standardised manner. While interest in Life Cycle Assessment (LCA) for space missions has gained in strength in the past few years
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Detection of Low Velocity Space Debris and Micrometeoroid Impacts
An Experimental Investigation
Space debris and micrometeoroids are abundant around our home planet and offer both an opportunity of research for scientists and a threat to human’s endeavours in space. Impacts with even the smallest particles can happen at such high velocities that they can damage or destroy a
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Straight line propagation in radio occultation measurements at Mars
A feasibility study for an alternative calculation of refractivity profiles
Since the first radio occultation measurements were performed to study planetary atmospheres, the calculations returning refractivity profiles always adopted the so-called "spherical symmetry assumption". This hypothesis imposes a null horizontal gradient of the atmospheric param
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