A5040636529- Astro and Planetary Science
- Space Satellite Systems and Control
- Planetary Science and Exploration
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Spacecraft Dynamics and Control
- Spacecraft Design and Technology
- Spacecraft and Cryogenic Technologies
- Inertial Sensor and Navigation
- Geophysics and Gravity Measurements
- GNSS positioning and interference
- Advanced SAR Imaging Techniques
- Satellite Communication Systems
- Aerospace Engineering and Control Systems
- Ocean Waves and Remote Sensing
- Ionosphere and magnetosphere dynamics
- Soil Moisture and Remote Sensing
- Solar and Space Plasma Dynamics
- Cryospheric studies and observations
- Rocket and propulsion systems research
- Advanced Frequency and Time Standards
- Stellar, planetary, and galactic studies
- Arctic and Antarctic ice dynamics
- Space Science and Extraterrestrial Life
- Geophysical Methods and Applications
- BIM and Construction Integration
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2013-2024
Terra
2012
National Space Agency
2011
TU Dresden
2003-2005
Planetary Science Institute
2004
European Space Operations Centre
2002
Robert Bosch (Germany)
2002
EnMAP (Environmental Mapping and Analysis Program) is a high-resolution imaging spectroscopy remote sensing mission that was successfully launched on April 1st, 2022. Equipped with prism-based dual-spectrometer, performs observations in the spectral range between 418.2nm 2445.5nm 224 bands high radiometric accuracy stability. products, ground instantaneous field-of-view of 30m×30m at swath width 30km, allow for qualitative quantitative analysis surface variables from frequently consistently...
All existing examples of current measurements by spaceborne synthetic aperture radar (SAR) along-track (AT) interferometry (ATI) have suffered from short baselines and corresponding low sensitivities. Theoretically, the best data quality at X-band is expected effective on order 30 m, i.e., times as long divided-antenna modes TerraSAR-X. In early 2012, we had a first opportunity to obtain near-optimum TanDEM-X satellite formation. this paper, analyze two interferograms acquired over Pentland...
On June 21, 2010, the TanDEM-X mission was launched and opened a new era in spaceborne radar remote sensing. The first formation flying system built by extending TerraSAR-X synthetic aperture (SAR) second, TerraSAR-X-like satellite TanDEM-X. resulting large single-pass SAR interferometer features flexible baseline selection, enabling acquisition of highly accurate cross-track interferograms not impacted temporal decorrelation atmospheric disturbances. primary objective generation global...
Starting in late 2007 and continuing through the present, NFIRE (Near-Field Infrared Experiment), a Missile Defense Agency (MDA) experimental satellite TerraSAR-X, German commercial SAR have been conducting mutual crosslink experiments utilizing secondary laser communication payload built by Tesat-Spacecom. The narrow beam-widths high relative inter-spacecraft velocities for two low-earth-orbiting satellites imply strict pointing control dynamics aboard both vehicles. achieved rapid...
ABSTRACT: TanDEM-X is the first Synthetic Aperture Radar (SAR) mission using close formation flying for bistatic SAR interferometry. Within three years, will enable a global mapping of Earth and production high resolution digital elevation model (DEM). As prerequisite interferometric processing, relative position, or baseline, two spacecraft must be determined with millimeter accuracy. In support this task, are equipped geodetic-grade GPS receivers. Independent baseline solutions from German...
The satellite of the TerraSAR-X mission, called TSX, was launched on 15 June 2007 and its identically constructed twin TDX, which is required by mission TanDEM-X, 21 2010. Together they supply high-quality radar data in order to serve two goals: Scientific observation Earth provisioning remote sensing for commercial market (TerraSAR-X mission) generation a global digital elevation model (DEM) Earth’s surface (TanDEM-X mission). On occasion 10th anniversary focus will be development system...
This paper recalls the essential elements of joint TerraSAR-X and TanDEM-X ground segment. It elaborates on some topics which are usually not in primary focus from a pure SAR technical point view, e.g. flight formation. Both commissioning early routine phase results operating segment given.
Since end of 2010 the German TerraSAR-X and TanDEM-X satellites are routinely operated as first configurable single-pass Synthetic Aperture Radar interferometer in space.The two 1340 kg fly a 514 km sun-synchronous orbit.In order to collect sufficient measurements for generation global digital elevation model demonstrate new interferometric SAR techniques applications, more than three years formation flying foreseen with flexible baselines ranging from 150 m few kilometers.As prerequisite...
Tandem-L is a proposal for an innovative L-band SAR mission the systematic observation of dynamic processes on Earth's surface. The concept based two satellites flying in close formation featuring latest digital beamforming techniques combination with large deployable reflector increasing swath width and imaging resolution. This enables operation modes such as polarimetric tomography determining vertical structure vegetation ice. With novel processing vast recording capacity up to 8...
The in-flight performance validation of the experimental autonomous formation keeping system embarked by German TanDEM-X has been performed during a 12-day-long closed-loop campaign conducted in June 2012. Relative control better than 10 m was achieved, demonstrating that significant gain can be achieved when is done autonomously on-board instead on-ground. Furthermore, shown to operationally robust, easy operate and fully predictable, i.e., suited for routine mission operations. This...
Any future space debris removal or on-orbit servicing mission faces the problem of initial relative orbit determination satellite to non-cooperative target. In this work, we analyse navigation accuracy that can be achieved in low Earth orbit, by using ground-based from radar tracking measurements for target, and classical GPS-based satellite. The analysis is based on obtained a 10 × 34 cm small object at an altitude 635 km. results show determined with down 2 m (RMS) semi-major axis, 20 both...
This paper describes the TerraSAR-X / TanDEM-X formation control concept, which bases on relative eccentricity inclination vector separation method, implemented within GSOC's flight dynamics system.The specifically elaborates results obtained during first six month of flying mission showing safe and precise automated groundcontrol space-borne radar interferometer.
Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.
In 2004, the total zero Doppler steering was proposed to minimize centroid for SAR applications. It firstly implemented in German TerraSAR-X satellite. This satellite launched May 2007. With already analysed data, it is now possible compare predictions with taken data from commissioning phase. shown that after an additional offset attitude control system of satellite, remaining well below 100 Hz as predicted.