@techreport{RieglerWernerKayal2022,
  type      = {Working Paper},
  author    = {Riegler, Clemens and Werner, Lennart and Kayal, Hakan},
  title     = {MAPLE: Marsian Autorotation Probe Lander Experiment},
  doi       = {10.25972/OPUS-28239},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-282390},
  pages     = {7},
  year      = {2022},
  abstract  = {The first step towards aerial planetary exploration has been made. Ingenuity shows extremely promising results, and new missions are already underway. Rotorcraft are capable of flight. This capability could be utilized to support the last stages of Entry, Descent, and Landing. Thus, mass and complexity could be scaled down. Autorotation is one method of descent. It describes unpowered descent and landing, typically performed by helicopters in case of an engine failure. MAPLE is suggested to test these procedures and understand autorotation on other planets. In this series of experiments, the Ingenuity helicopter is utilized. Ingenuity would autorotate a "mid-air-landing" before continuing with normal flight. Ultimately, the collected data shall help to understand autorotation on Mars and its utilization for interplanetary exploration.},
  language  = {en}
}
@phdthesis{Balagurin2022,
  author    = {Balagurin, Oleksii},
  title     = {Designoptimierung von Sternsensoren f{\"u}r Pico- und Nanosatelliten},
  doi       = {10.25972/OPUS-25896},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-258966},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2022},
  abstract  = {Die Raumfahrt ist eine der konservativsten Industriebranchen. Neue Entwicklungen von Komponenten und Systemen beruhen auf existierenden Standards und eigene Erfahrungen der Entwickler. Die Systeme sollen in einem vorgegebenen engen Zeitrahmen projektiert, in sehr kleiner St{\"u}ckzahl gefertigt und schließlich aufwendig qualifiziert werden. Erfahrungsgem{\"a}ß reicht die Zeit f{\"u}r Entwicklungsiterationen und weitgehende Perfektionierung des Systems oft nicht aus. Fertige Sensoren, Subsysteme und Systeme sind Unikate, die nur f{\"u}r eine bestimme Funktion und in manchen F{\"a}llen sogar nur f{\"u}r bestimmte Missionen konzipiert sind. Eine Neuentwicklung solcher Komponenten ist extrem teuer und risikobehaftet. Deswegen werden flugerprobte Systeme ohne {\"A}nderungen und Optimierung mehrere Jahre eingesetzt, ohne Technologiefortschritte zu ber{\"u}cksichtigen. Aufgrund des enormen finanziellen Aufwandes und der Tr{\"a}gheit ist die konventionelle Vorgehensweise in der Entwicklung nicht direkt auf Kleinsatelliten {\"u}bertragbar. Eine dynamische Entwicklung im Low Cost Bereich ben{\"o}tigt eine universale und f{\"u}r unterschiedliche Anwendungsbereiche leicht modifizierbare Strategie. Diese Strategie soll nicht nur flexibel sein, sondern auch zu einer m{\"o}glichst optimalen und effizienten Hardwarel{\"o}sung f{\"u}hren. Diese Arbeit stellt ein Software-Tool f{\"u}r eine zeit- und kosteneffiziente Entwicklung von Sternsensoren f{\"u}r Kleinsatelliten vor. Um eine maximale Leistung des Komplettsystems zu erreichen, soll der Sensor die Anforderungen und Randbedingungen vorgegebener Anwendungen erf{\"u}llen und dar{\"u}ber hinaus f{\"u}r diese Anwendungen optimiert sein. Wegen der komplexen Zusammenh{\"a}nge zwischen den Parametern optischer Sensorsysteme ist keine „straightforward" L{\"o}sung des Problems m{\"o}glich. Nur durch den Einsatz computerbasierter Optimierungsverfahren kann schnell und effizient ein bestm{\"o}gliches Systemkonzept f{\"u}r die gegebenen Randbedingungen ausgearbeitet werden.},
  subject      = {Sternsensor},
  language  = {de}
}
@techreport{RieglerKayal2022,
  type      = {Working Paper},
  author    = {Riegler, Clemens and Kayal, Hakan},
  title     = {VELEX: Venus Lightning Experiment},
  doi       = {10.25972/OPUS-28248},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-282481},
  pages     = {6},
  year      = {2022},
  abstract  = {Lightning has fascinated humanity since the beginning of our existence. Different types of lightning like sprites and blue jets were discovered, and many more are theorized. However, it is very likely that these phenomena are not exclusive to our home planet. Venus's dense and active atmosphere is a place where lightning is to be expected. Missions like Venera, Pioneer, and Galileo have carried instruments to measure electromagnetic activity. These measurements have indeed delivered results. However, these results are not clear. They could be explained by other effects like cosmic rays, plasma noise, or spacecraft noise. Furthermore, these lightning seem different from those we know from our home planet. In order to tackle these issues, a different approach to measurement is proposed. When multiple devices in different spacecraft or locations can measure the same atmospheric discharge, most other explanations become increasingly less likely. Thus, the suggested instrument and method of VELEX incorporates multiple spacecraft. With this approach, the question about the existence of lightning on Venus could be settled.},
  language  = {en}
}
@techreport{BoeschStielerLydonetal.2023,
  author    = {B{\"o}sch, Carolin and Stieler, Malena and Lydon, Salomon and Hesse, Martin and Ali, Hassan and Finzel, Matthias and Faraz Ali, Syed and Salian, Yash and Alnoor, Hiba and John, Jeena and Lakkad, Harsh and Bhosale, Devraj and Jafarian, Timon and Parvathi, Uma and Ezzatpoor, Narges and Datar, Tanuja},
  title     = {Venus Research Station},
  issn      = {2747-9374},
  doi       = {10.25972/OPUS-32869},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-328695},
  pages     = {232},
  year      = {2023},
  abstract  = {Because of the extreme conditions in the atmosphere, Venus has been less explored than for example Mars. Only a few probes have been able to survive on the surface for very short periods in the past and have sent data. The atmosphere is also far from being fully explored. It could even be that building blocks of life can be found in more moderate layers of the planet's atmosphere. It can therefore be assumed that the planet Venus will increasingly become a focus of exploration. One way to collect significantly more data in situ is to build and operate an atmospheric research station over an extended period of time. This could carry out measurements at different positions and at different times and thus significantly expand our knowledge of the planet. In this work, the design of a Venus Research Station floating within the Venusian atmosphere is presented, which is complemented by the design of deployable atmospheric Scouts. The design of these components is done on a conceptual basis.},
  subject      = {Venus},
  language  = {en}
}