Martin Langer

Martin Langer
Technische Universität München | TUM · Institute of Astronautics

Dr.-Ing.

About

52
Publications
47,899
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
348
Citations
Introduction
Martin Langer received his Dipl.-Ing. and Dr.-Ing. Degree in Aerospace Engineering from the Technical University of Munich (TUM). He is the project manager of MOVE-II, a single unit CubeSat, launched in December 2018. His research interests cover reliability assurance and risk mitigation of Small Satellites, development of robust SmallSat Hard- and Software and hands-on space education in universities.

Publications

Publications (52)
Article
Full-text available
Deriving the extent of areas affected by wildfires is critical to fire management, protection of the population, damage assessment, and better understanding of the consequences of fires. In the last two decades, several algorithms utilizing data from Earth observation satellites have been developed to detect fire-affected areas. However, most of th...
Conference Paper
Full-text available
CubeSats have been on the rise during the last decade and have the potential to substitute large, expensive satellites in many commercial and scientific applications. A reasonable commercial application of these standardized small satellites are Earth Observation constellations with medium spatial and high temporal resolution. The company Orbital O...
Article
Full-text available
This article reports the ongoing work on an environment for hardware-in-the-loop (HIL) and software-in-the-loop (SIL) tests of CubeSats and the benefits gained from using such an environment for low-cost satellite development. The satellite tested for these reported efforts was the MOVE-II CubeSat, developed at the Technical University of Munich si...
Conference Paper
Full-text available
MOVE-II (Munich Orbital Verification Experiment) is the second satellite of the Technical University of Munich's educational CubeSat program. On December 3, 2018, the satellite was launched on the SSO-A SmallSat Express from the Vandenberg Air Force Base. The following paper shows on-orbit results of the first eight months of operations. It include...
Conference Paper
Full-text available
Abstract—Over the past decade, the figures of merit of volume and mass for satellites have increased dramatically while the time to orbit decreased in the same manner. New applications based on small satellites are drivers in this new era where spacecraft development has to be both fast and reliable. Deployment and pointing mechanisms are one keyst...
Conference Paper
Full-text available
In the past and present, the space sector has been dominated by conventional risk-averse development methods. Accelerated by the involvement of private companies and investors in the commercial space industry, the New Space approach of spacecraft development emerged. This paper captures the shift, which is taking place in the industrial space secto...
Conference Paper
Full-text available
Since their introduction in 1999, CubeSats emerged from a simple idea of standardizing small satellites to an accepted design baseline. More than 700 CubeSats have been launched so far, and many of them enabled students to work on real space hard-and software. Nowadays CubeSats are used not only for science and education purposes, but also in comme...
Preprint
Full-text available
The increase of CubeSat missions with energy demanding payloads and the ongoing miniaturization of electric components lead to growing thermal challenges in those standardized small satellites. For upcoming commercial and scientific missions, it is important to overcome these challenges and to provide the necessary thermal conditions for demanding...
Conference Paper
Full-text available
In this paper, we will report on the results and lessons learned of the development, test and operation of two software-defined transceivers on the CubeSat mission MOVE-II (Munich Orbital Verification Experiment II). MOVE-II, a single-unit CubeSat, is the second satellite of the CubeSat program MOVE of the Technical University of Munich (TUM). The...
Conference Paper
Full-text available
Successful utilization of Additive Manufacturing (AM) in the space sector implicates two aspects: First, an understanding of the process inherent characteristics has to be developed, where the anisotropic behavior of material is of significant importance. Second, the part design methodology has to be adapted, since it is often coupled and limited t...
Thesis
Full-text available
This dissertation describes a set of methods used to track, assess and predict the reliability of CubeSats through system level testing and reliability growth modelling. In the last decade, CubeSats have matured from educational tools into accepted scientific and commercial assets, with more than 700 of those standardized satellites launched so far...
Conference Paper
Full-text available
A drag sail for the 12U-CubeSat ERNST has been developed. The drag sail includes 4 tape spring booms which deploy four sail segments. The development indicates first steps of building breadboards and optimizing the hardware in terms of a critical analysis. Several design iterations, which have been worked out during a master's thesis, were indicate...
Patent
Full-text available
Embodiments described herein include a satellite cover panel for covering a satellite, particularly a payload bay of a satellite comprising an energy storage module, at least one energy generating module defining, at least partially, a first outer surface of the satellite cover panel, and a logic board defining, at least partially, a second outer s...
Poster
Full-text available
CubeSat solar system escape missions are likely feasible in the next 10-20 years. Key technologies are currently under development for interplanetary CubeSat missions. Key technologies require further performance increase: optical communication, advanced laser sails, power generation, miniaturized science instruments (impactor), CubeSat-sized heat...
Conference Paper
Full-text available
With the continuous advancements in commercial off-the-shelf small satellite technology, there has been a significant increase in proposed missions and an ongoing trend towards rapid development and launch. Traditionally, mission operations of larger spacecraft utilize established products, adapting the operational interfaces and software to the ne...
Conference Paper
Full-text available
MOVE-II (Munich Orbital Verification Experiment II) is a 1 Unit CubeSat currently under development at the Technical University of Munich (TUM). This paper reports on the technical as well as the organizational advancements of the project. With overall more than 130 students involved so far, the project is currently in Phase D, with the launch of t...
Conference Paper
Full-text available
Changes due to design flaws impose major costs, delays and high risks on any spaceflight project. The later the change, the riskier and more expensive it is. System changes due to failures detected during spacecraft assembly are usually one of the last hardware flaws to be found and therefore impose major risks on the overall project. Traditionally...
Conference Paper
Full-text available
Software development for space applications is characterized by historically grown structures and conservative methods derived from traditional project management. Many of these methods are not easily transferable from normal product development to software development. Project risk is high and delays are the rule due to the many uncertainties rega...
Article
Full-text available
This paper discusses the physics, engineering and mission architecture relating to a gram-sized interstellar probe propelled by a laser beam. The objectives are to design a fly-by mission to Alpha Centauri with a total mission duration of 50 years travelling at a cruise speed of 0.1c. Furthermore, optical data from the target star system is to be o...
Article
Full-text available
Water scarcity and contamination of clean water have been identified as major challenges of the 21st century, in particular for developing countries. According to the International Water Management Institute, about 30% of the world's population does not have reliable access to clean water. Consequently, contaminated water contributes to the death o...
Conference Paper
Full-text available
This paper presents the fundamental work on the attitude control design using solely magnetic actuation for the MOVE-II mission. Two control modes are primarily considered: detumbling and sun pointing control. Regarding the sun pointing control, two approaches are discussed. The first is the Spin Stabilized Sun Pointing Control (SSPC) which provide...
Conference Paper
Full-text available
MOVE-II (Munich Orbital Verification Experiment) will be the first CubeSat of the Technical University of Munich (TUM) utilizing a magnetorquer-based active attitude determination and control system (ADCS). The ADCS consists of six circuit boards (five satellite side panels and one central circuit board in satellite stack), each equipped with a mic...
Conference Paper
Full-text available
Since the dawn of the space age, software has always been a critical aspect for any space mission launched. Over the decades, more complexity, autonomy and functionality was added to both unmanned and manned missions, yielding in an exponential growth of the lines of codes used in space projects over the years. Although a lot of effort was put into...
Conference Paper
Full-text available
With the continuous advancements in nano-satellite technology, there has been a significant increase in proposed CubeSat missions for sophisticated space exploration. Due to their cost efficiency, rapid development and ongoing miniaturization of satellite bus systems and scientific payloads, CubeSats offer the potential to increase the range of cap...
Conference Paper
Full-text available
Water scarcity and contamination of clean water have been identified as major challenges of the 21 st century, in particular for developing countries. According to the International Water Management Institute, about 30 percent of the world´s population does not have reliable access to clean water. Consequently, contaminated water contributes to the...
Presentation
Full-text available
Due to comparatively low costs required for development and launch, and the opportunity to use commercial off-the-shelf and standardized subsystems, CubeSats are now widely used in universities and companies worldwide. Moreover, start-up companies like PlanetLabs, OneWeb or Spire launched their own space race of private nano- and microsatellite con...
Article
Full-text available
This paper provides results and conclusions on a survey on the implementation and reliability aspects of CubeSat bus interfaces, with an emphasis on the data bus and power distribution. It provides recommendations for a future CubeSat bus standard. The survey is based on a literature study and a questionnaire representing 60 launched CubeSats and 4...
Conference Paper
Full-text available
In this paper we investigate the data on 178 launched CubeSats and conduct a nonparametric and parametric analysis, where the dead-on-arrival (DOA) cases as well as the subsystem contribution to failure are specifically addressed. Using Maximum Likelihood Estimation, a Single Weibull and a 2-Weibull mixture parametric model are fitted to the non-pa...
Conference Paper
Full-text available
Several promising multi-junction solar cell concepts for space applications are currently under development worldwide. On-Orbit Verification on CubeSats is a cost-efficient method to gain data on critical hardware early in the design validation process. The MOVE-II CubeSat will be used for the verification of novel 4-6 junction solar cells. With a...
Conference Paper
Full-text available
We present Nanolink, a data link layer protocol for CubeSats and other spaceborne assets with similar bandwidth and hardware resources. The protocol is designed to operate with high efficiency and high reliability over links with a small bandwidth-delay product and moderate to weak signal quality. A type-I hybrid automatic repeat request (ARQ) sche...
Conference Paper
Full-text available
Despite being versatile and efficient for various use cases, nano-and microsatellites are still plagued by low dependability. The low survivability of many earlier CubeSat missions can be attributed, among others, to low component level failure tolerance and a lack of FDIR functionality. Most nanosatellite developers underestimate the required test...
Conference Paper
Full-text available
The Institute of Astronautics (LRT) at Technical University of Munich (TUM) incorporates self-reliant student teams to provide hands-on space education. Organized within the student group WARR almost 200 students are developing space hard- and software supervised by the institute’s staff members. The CubeSat project MOVE-II is one of the most chall...
Conference Paper
Full-text available
We present storage integrity concepts developed for the CubeSat MOVE-II over the past two years, enabling dependable computing without relying solely upon hardened special purpose hardware. Neither component level, nor hardware-or software-side measures individually can guarantee sufficient system consistency with modern highly scaled components. I...
Conference Paper
Full-text available
Future spacemissions will require vast amounts of data to be stored and processed aboard spacecraft. While satisfying operational mission requirements, storage systems must guarantee data integrity and recover damaged data throughout the mission. NAND-flash memories have become popular for space-borne high performance mass memory scenarios, though...
Conference Paper
Full-text available
This paper presents the on-orbit results and the lessons learned from First-MOVE (Munich Orbital Verification Experiment), the first CubeSat mission of the Institute of Astronautics (LRT) at the Technische Universität München (TUM). The development of the satellite started as a student project in 2006. First-MOVE was launched on November 21st 2013....
Conference Paper
Full-text available
A satellite’s on-board computer must guarantee integrity and recover degraded or damaged data over the entire duration of the spacecraft’s mission in an extreme, radiated environment. While redundancy and hardware-side voting can protect Magnetoresistive RAM well from device failure, more sophisticated software-side storage concepts are required if...
Conference Paper
Full-text available
The University of Wuppertal and the Research Centre Juelich are developing a small satellite for climate research (Development Initiative for Small Satellites Exploring Climate Processes by Tomography, DISSECT). This paper focuses on its mission and its science payload. Based on the three unit CubeSat form factor, the payload consists of a small sp...
Conference Paper
Full-text available
This paper investigates the utilization of deployable and expandable structures for communication purposes and solar power generation on CubeSats. We present the design and on-orbit results of the flight-proven solar-panel release mechanism of the first satellite of Technische Universität München First-MOVE, as well as the preliminary design of a s...
Conference Paper
Full-text available
The Antiproton Flux in Space (AFIS) mission aims to measure the flux of antiprotons trapped in Earth's magnetic field at very low energies. A novel particle detector featuring cutting-edge silicon-based sensor technology and fast real-time electronics is being developed specifically for this purpose at Technische Universität München (TUM). Its inno...
Presentation
Full-text available
MOVE II is a 2U CubeSat currently under development at Technische Universität München (TUM). The main objective of the MOVE II mission is to measure the flux of magnetically trapped antiprotons with kinetic energies below 80 MeV inside the South Atlantic Anomaly (SAA). Several theoretical models have been published in the last 20 years describing t...

Network

Cited By

Projects

Projects (8)
Project
Global wildfire early detection and monitoring