Munich, Germany
Munich, Germany

Kayser-Threde GmbH based in Munich, Germany is a systems house specializing in the design and development of high-technology solutions for astronautics, science and the industry. The array of solutions includes applications in manned and unmanned space missions, optics, telematics, crash test data acquisition, and process control for the rail sector.On September 1, 2014, Bremen-based OHB System AG and Munich-based Kayser-Threde GmbH merged under the name OHB System AG. In this way, the capabilities and capacities of our two outstanding space companies were centralized Wikipedia.

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Segl K.,German Research Center for Geosciences | Segl K.,University of Potsdam | Guanter L.,German Research Center for Geosciences | Kaufmann H.,German Research Center for Geosciences | And 5 more authors.
IEEE Transactions on Geoscience and Remote Sensing | Year: 2010

The simulation of remote sensing images is a valuable tool for defining future Earth observation systems, optimizing instrument parameters, and developing and validating data-processing algorithms. A scene simulator for optical Earth observation data has been developed within the Environmental Mapping and Analysis Program (EnMAP) hyperspectral mission. It produces EnMAP-like data following a sequential processing approach consisting of five independent modules referred to as reflectance, atmospheric, spatial, spectral, and radiometric modules. From a modeling viewpoint, the spatial module is the most complex. The spatial simulation process considers the satellitetarget geometry, which is adapted to the EnMAP orbit and operating characteristics, the instrument spatial response, and the sources of spatial nonuniformity (keystone, telescope distortion and smile, and detector coregistration). The spatial module of the EnMAP scene simulator is presented in this paper. The EnMAP spatial and geometric characteristics will be described, the simulation methodology will be presented in detail, and the capability of the EnMAP simulator will be shown by illustrative examples. © 2006 IEEE.

Lohle S.,Institute For Raumfahrtsysteme | Mezger A.,Kayser Threde GmbH | Fulge H.,Institute For Raumfahrtsysteme
Acta Astronautica | Year: 2013

The Hayabusa sample return capsule, which contained asteroid samples, re-entered the Earth's atmosphere on June 13, 2010. An ablative carbon-phenolic thermal protection system (TPS) was used to enable a safe return for the small capsule and the containing samples. Besides a research aircraft operated by NASA with a wide range of imaging and spectrographic cameras for remote sensing of the radiation of the Hayabusa capsule during its entry flight, observation from ground based stations has been realized. We participated in the ground based observation campaign with two instruments for spectroscopic and photometric measurements aiming to detect the surface temperature and the plasma radiation in front of the re-entering capsule. The system consists in an infrared camera and a wide range miniature fibre spectrometer. The paper presents the setup, the laboratory calibration procedure, and correction for transmission. The surface temperature of the capsule reached a peak of 3250 K when the capsule was at an altitude of 55.95 km. The thermographic camera measures independently slightly higher temperature at peak heating (3308 K). © 2012 Elsevier Ltd. All rights reserved.

Agency: European Commission | Branch: FP7 | Program: CP | Phase: SPA.2010.2.2-01 | Award Amount: 2.72M | Year: 2011

A range of new applications will be enabled by ultra-precise optical clocks, some of which by using them in space, near or far distant from Earth. They cover the fields of fundamental physics (tests of General Relativity), time and frequency metrology (comparison of distant terrestrial clocks, operation of a master clock in space), geophysics (mapping of the gravitational potential of the Earth), and potential applications in astronomy (local oscillators for radio ranging and interferometry in space). We propose to (1) develop two engineering confidence ultra-precise transportable lattice optical clock demonstrators with relative frequency instability < 110-15/root(tau)1/2, inaccuracy < 510-17, one of which as a breadboard. They will be based on trapped neutral Ytterbium and Strontium atoms. Goal performance is about 1 and 2 orders better than todays best transportable clocks, in inaccuracy and instability, respectively. The two systems will be validated in a laboratory environment (TRL 4) and performance will be established by comparison with laboratory optical clocks and primary frequency standards. (2) We will develop the necessary laser systems (adapted in terms of power, linewidth, frequency stability, long-term reliability, and accuracy), atomic packages with control of systematic (magnetic fields, black-body radiation, atom number), where novel solutions with reduced space, power and mass requirements will be implemented. Some of the laser systems will be developed towards particularly high compactness and robustness. Also, crucial laser components will be tested at TRL 5 level (validation in relevant environment). The work will build on the expertise of the proposers with laboratory optical clocks, and the successful development of breadboard and transportable cold Sr and Yb atomic sources and ultrastable lasers during the ELIPS-3 ESA development project Space Optical Clocks (SOC).

Reichardt J.,German Weather Service | Wandinger U.,Leibniz Institute for Tropospheric Research | Klein V.,Kayser Threde GmbH | Mattis I.,Leibniz Institute for Tropospheric Research | And 3 more authors.
Applied Optics | Year: 2012

The Raman lidar for atmospheric moisture sensing (RAMSES) for unattended, continuous multiparameter atmospheric profiling is presented. A seeded frequency-tripled Nd:YAG laser serves as the light source. A nine-channel polychromator, nonfiber coupled to the main telescope (790mmdiameter), is used for far-range measurements. Near-range observations are performed with a three-channel polychromator, fiber coupled to a secondary telescope (200 mmdiameter). Measurement parameters are water-vapor mixing ratio (MR), temperature, and the optical particle parameters, which are extinction coefficient, backscatter coefficient, lidar ratio, and depolarization ratio at 355 nm. Profiles of water-vapor MR are measured from close to the surface up to 14 km at night and 5 km during the day under favorable atmospheric conditions in 20 min. Temperature profiles of the troposphere and lower stratosphere are determined with the rotational-Raman technique. For the detection of the rotational Raman signals, a new beamsplitter/interference-filter experimental setup is implemented that is compact, robust, and easy to align. Furthermore, the polychromator design allows two independent methods for calibrating measurements of depolarization ratio. RAMSES optical design concept and experimental setup are detailed, and a description of the operational near-real-time data evaluation software is given. A multiday observation is discussed to illustrate the measurement capabilities of RAMSES. © 2012 Optical Society of America.

Agency: European Commission | Branch: FP7 | Program: MC-ITN | Phase: FP7-PEOPLE-2013-ITN | Award Amount: 3.87M | Year: 2013

During the last decades atomic clocks and frequency standards have become an important resource for advanced economies with impact ranging from satellite navigation (GPS, GLONASS, Galileo) to high speed communication networks, where they ensure synchronisation of data packets at ever higher bit rates. In this field the wake of the new millennium has been marked by the invention of frequency comb technology, a discovery so important that it was awarded the Nobel Prize in Physics in 2005. Femtosecond comb technology enables two major advances (i) a factor of 1000 improvement in sensitivity and accuracy over current atomic clock technology and (ii) the possibility to create a precision frequency synthesizer ranging from the Hz level up to 10^17 Hz or even higher, i.e. covering the electromagnetic spectrum from DC to the soft x-ray regime. The technological impact of this current development is likely to be tremendous, opening new applications, e.g. in relativistic geodesy, where ultraprecise clocks sense the gravitational potential via the redshift arising from general relativity. This might open new markets in oil and mineral exploration, supervision of CO2 sequestration and hydrology and climate research. However the technologies associated with optical clocks and frequency standards are still in the laboratory stage and experts in the field are desperately needed for developing commercially viable systems and applications. This ITN is addressing this issue by implementing a training programme covering all aspects from the atomic reference and ultrastable lasers to frequency comb synthesis, precision frequency distribution and commercial system technology. It focuses on technological developments enhancing the technology readiness level of the new optical atomic clocks, enhancing the chance that they are picked up by the commercial sector. At this initial stage the vehicle will be space technology, which is promising the first high-precision applications.

Isleif K.-S.,Leibniz University of Hanover | Gerberding O.,Leibniz University of Hanover | Gerberding O.,U.S. National Institute of Standards and Technology | Gerberding O.,University of Maryland University College | And 8 more authors.
Optics Express | Year: 2014

Digitally enhanced heterodyne interferometry is a metrology technique that uses pseudo-random noise codes for modulating the phase of the laser light. Multiple interferometric signals from the same beam path can thereby be isolated based on their propagation delay, allowing one to use advantageous optical layouts in comparison to classic laser interferometers. We present here a high speed version of this technique for measuring multiple targets spatially separated by only a few centimetres. This allows measurements of multiplexed signals using free beams, making the technique attractive for several applications requiring compact optical set-ups like for example space-based interferometers. In an experiment using a modulation and sampling rate of 1.25 GHz we are able to demonstrate multiplexing between targets only separated by 36 cm and we achieve a displacement measurement noise floor of < 3pm/ √Hz at 10 Hz between them. We identify a limiting excess noise at low frequencies which is unique to this technique and is probably caused by the finite bandwidth in our measurement set-up. Utilising an active clock jitter correction scheme we are also able to reduce this noise in a null measurement configuration by one order of magnitude. © 2014 Optical Society of America.

Segl K.,Helmholtz Center Potsdam | Guanter L.,University of Oxford | Rogass C.,Helmholtz Center Potsdam | Kuester T.,Helmholtz Center Potsdam | And 5 more authors.
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing | Year: 2012

The design of future Earth imaging systems, the optimization of fundamental instrument parameters, and the development and evaluation of data pre-processing and scientific-exploitation algorithms require an accurate end-to-end simulation of the entire image generation and processing chain. For this purpose, the end-to-end simulation software EeteS has been developed within the framework of the Environmental Mapping and Analysis Program (EnMAP) mission. This paper presents the EeteS simulation approach and software implementation focusing on calibration and pre-processing. The sequential processing chain of the EnMAP scene simulator consists of four independent partsthe atmospheric, spatial, spectral and radiometric modules. This forward simulator is coupled with a backward simulation branch consisting of calibration modules (non-linearity, dark current and absolute radiometric calibration) and a series of pre-processing modules (radiometric calibration, co-registration, atmospheric correction and orthorectification) forming the complete end-to-end simulation tool. In the result EeteS is capable of simulating EnMAP-like raw image scenes (L0) taking into account a variety of instrumental and environmental configurations. Furthermore, EeteS allows simulations of EnMAP reflectance images carrying out the complete L1 and L2 processing chains. Analysis of the intermediate and final EeteS simulation products has shown the accurate, reliable and consistent performance of the developed modules enabling the system to support technical decision-making processes required for the development of the EnMAP sensor. EeteS has also been used to estimate the SNR characteristics of potential EnMAP products after calibration and pre-processing. Comparing the results to SNR characteristics achieved by the already existing EO-1 Hyperion system has shown a significantly improved SNR which can be expected from future EnMAP data products. © 2012 IEEE.

Hofmann P.,Kayser Threde GmbH
Proceedings of the International Astronautical Congress, IAC | Year: 2012

Jurgen Burfeindt, Gerrit Hausmann, Richard Haarmann, Lutz Richter Europe is presently preparing a robotic mission to the Earth's Moon. The Lunar Lander mission is aiming for a landing near the lunar South Pole in the year 2018. Different payload studies are currently being performed by the European Industry with ESA, but also with national funding. Kayser-Threde is leading or is significantly involved in the following payload studies: The "Lunar Dust Environment and Plasma Package" (L-DEPP) is accommodated on the ESA Lunar Lander vehicle for investigation of the plasma, charged/levitated dust and electromagnetic environment of the Moon. One objective of the intended investigation focuses on the transfer period between daylight and short darkness periods where great changes in this environment are expected. The "Lunar Dust Analysis Package" (L-DAP) is also accommodated on the lander spacecraft with the objective to determine, at microscopic scale, the mineralogical and elemental composition, the concentration of absorbed volatilcs as well as the key physical properties of lunar regolith samples delivered to the package. This is achieved by a combined Raman and LIBS spectrometer, coupled with optical and atomic force microscopy. The "Mobile Payload Element" (MPE) is designed to be a small autonomous innovative sample fetching rover vehicle in the 10 kg class, intended to be a German national contribution to the ESA Lunar Lander mission. Kayser-Threde, as the Phase 0/A industrial prime, has assembled relevant German industrial and institutional competences in space robotics for this study. The novel capability of the MPE is to acquire clearly documented samples from controlled surface as well as subsurface locations and to bring them to the lander for analysis with the volatile seeking instruments L-DAP and L-VRAP. The rover concept has a four-wheeled configuration with active suspension, being a compromise between innovation and mass efficiency. The suspension chosen allows a compact stowage of the MPE on the lander. As operational modes teleoperations from earth and autonomous navigation are foreseen. The MPE Phase 0/A study has finished in April 2012 and will be continued with a delta study beginning in October 2012. Copyright © (2012) by the International Astronautical Federation.

Requirements, advantages and risks of process data transmission through open networks are dis-cussed. Applications actually practised by DB Energie are described as examples of how sources of error may occur in the transmission system. Knowledge and procedures are proposed to ensure a reliable process data transmission.

Salado A.,Kayser Threde GmbH
23rd Annual International Symposium of the International Council on Systems Engineering, INCOSE 2013 | Year: 2013

There is an increasing interest in Model-Based Systems Engineering (MBSE) practices in academia and industry. The majority of research and adoption in industry is relevant to the early phases of the system life-cycle, where model-based design is expected to provide improved results during system development. However, little attention has been paid to the application of such methodology to later phases of the development, and in particular to system integration and verification of the actual manufactured system, which continues to be done in the traditional document-centric environment. This paper proposes a model-centric environment for system integration and verification activities at the end of the development cycle and presents benefits in effectiveness and efficiency in planning system integration and verification activities for a system under a model-centric environment. © 2013 by Alejandro Salado.

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