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Jena, Germany

Strietzel R.,Jena Optronik GmbH
European Control Conference, ECC 1999 - Conference Proceedings

For the docking of spacecrafts a highly precise attitude and position control is necessary. This supposes an adequate measurement of the relative position and attitude of the docking spacecrafts. Here is presented, how a CCD camera can be used to measure the necessary data. Laser light coming from the direction of the camera illuminates a special target of retroreflectors. The reflected light produces light dots on the CCD plane of the camera. Their locations are used to calculate the values of relative position and attitude in a direct method. Essentially the accuracy of the position and attitude data depends on the measurement of the light points on the CCD. The obtained algorithm for the determination of position and attitude and the influences on the attainable accuracy are discussed and the results presented. © 1999 EUCA. Source

Fechtmann C.,Applied Space Technology | Pradarutti B.,Jena Optronik GmbH
European Space Agency, (Special Publication) ESA SP

High performance or ultra-performance plastics are low density materials that - especially when reinforced by carbon or other fibers - can provide similar performance in strength than metals. They also offer the unique capability to create custom materials with specifically designed properties. In addition to that, the related manufacturing techniques, here especially injection molding, but also selective laser melting (SLM), allow a precision of fabrication with (sub-)micrometer accuracy with high repeatability. Due to this, complex designs can be made as one part, so that many functions like assembly helps, fasteners, mechanical strengthening, guides, reference surfaces and so on are an integral part of the design and the structure. This not only helps in keeping the part count low, but can also reduce the cost for assembly, tests, qualification etc. In our investigations we could show that some ultraperformance plastics are not only suitable for space applications, but can offer design solutions that can even outperform typical high performance metal alloys. Furthermore, the ability to not only tailor the material properties, but the actual constituents of a plastic compound opens the way to unique solutions for radiation shielding, especially for long term human space flight. Copyright © 2013 European Space Agency. Source

Zerfowski I.,German Aerospace Center | Pillukat A.,Jena Optronik GmbH | Bonsignori R.,EUMETSAT
Proceedings of SPIE - The International Society for Optical Engineering

The evolving needs of the meteorological community concerning the EUMETSAT Polar System follow-on satellite mission (Post-EPS) require the development of a high-performance multi-spectral imaging radiometer, the so-called Visible-Infrared Imager (VII). Recognizing these needs, Jena Optronik GmbH proposed an innovative instrument concept, METimage. METimage is the candidate instrument to fulfill the VII mission on Post-EPS. Core item of the METimage instrument is a rotating telescope scanner covering the large swath width of about 2800 km, which is needed for a global coverage by a polar platform. The de-rotated image facilitates in-field spectral channel separation, which allows tailoring individual channel GSD (ground sampling distance) and features like TDI (time delay and integration). State-of-the-art detector arrays and read-out electronics will be employed. The reflecting telescope design is able to support demanding requirements on image quality and ground resolution. The chosen instrument concept covers a spectral range from 443 nm to 13.345 μm and provides 20 to 22 spectral channels. The ground sampling distance is 500 m and 250 m for selected high-resolution channels from low Earth orbit. The METimage instrument development is currently in phase B and has undergone its System Requirements Review in summer 2010. © 2010 Copyright SPIE - The International Society for Optical Engineering. Source

Wolf B.,Jena Optronik GmbH
2011 GEOSS Workshop XLI: Global Hydrology Interoperability and Field Applications, GEOSS XLI

The primary objective of GlobWetland II is to facilitate the integration of remote sensing into the conservation and management of wetlands The GlobWetland II project contributes to the set up of a Global Wetlands Observing System (G-WOS) as per the strategy 1.2 of the Ramsar Strategic Plan 2009-2015 adopted at last Conference of the Parties, in Changwon, South Korea. Creation of standard and comparable geo-information products (principally based on EO technologies) from country to country about the status and trends in wetlands ecological character; Creation of a common framework/ infrastructure and methods based on remote sensing for harmonizing the implementation and reporting to the Ramsar Convention; © 2011 IEEE. Source

Jena Optronik GmbH | Date: 2014-08-07

A hybrid network of kinematic sensors of an AOCS, made up of a star sensor including an optical camera head, and a processing unit provided as the central master processing unit, and additional kinematic sensors, each made up of a sensor element and a processing unit connected to the central processing unit via a first bus. An additional processing unit is equivalent to the processing unit and is a redundant central processing unit. The central processing units andare connected via an additional bus of a spacecraft provided with the hybrid network with the aid of a central computer. The particular active central processing units-provide all kinematic sensors with a uniform time pulse via a synchronization line, and supply the central computer with hybridized kinematic measuring data formed according to a method for hybridization based on the synchronous kinematic measuring data of the star sensor and the measuring data of the other sensors.

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