SPLICE Safe and Precise Landing - Integrated Capabilities Evolution

The SPLICE project is developing, maturing, demonstrating, and infusing precision landing and hazard avoidance (PL&HA) technologies for NASA and potential commercial spaceflight missions. Near-term development includes high precision and accuracy velocimetry with ranging (via the NDL), high-resolution real-time mapping and hazard detection with ranging (via the HDL), lunar terrain relative navigation (TRN), and the requisite high performance computing capability. These technologies are initially intended to provide PL&HA for the moon, but are extensible to any planetary body. Long-term, the goal is to make these capabilities available to government and commercial entities and to license technology to commercial entities for production

Single Board Computer Radiation Test Results and Radiation Test Software

Single Board Computers (SBCs) are quickly evolving and gaining capability as their cost comes down. As their footprints, cost, and power requirements decrease, their processing power increases. This makes them very attractive for use on space missions and an enabling technology as spacecraft size decreases and computational demand increases. One of the major challenges electronics face in the space environment is radiation. In 2019, the NASA Johnson Space Center (JSC) tested a selection of SBCs to low Earth orbit (LEO) radiation levels and evaluated their susceptibility and survivability. For this test campaign, JSC developed a Python software suite to better characterize the SBCs performance and intends to share the software

Visual Odometry for Autonomous Deep-Space Navigation Project

Autonomous rendezvous and docking (AR&D) is a critical need for manned spaceflight, especially in deep space where communication delays essentially leave crews on their own for critical operations like docking. Previously developed AR&D sensors have been large, heavy, power-hungry, and may still require further development (e.g. Flash LiDAR). Other approaches to vision-based navigation are not computationally efficient enough to operate quickly on slower, flight-like computers. The key technical challenge for visual odometry is to adapt it from the current terrestrial applications it was designed for to function in the harsh lighting conditions of space. This effort leveraged Draper Laboratorys considerable prior development and expertise, benefitting both parties. The algorithm Draper has created is unique from other pose estimation efforts as it has a comparatively small computational footprint (suitable for use onboard a spacecraft, unlike alternatives) and potentially offers accuracy and precision needed for docking. This presents a solution to the AR&D problem that only requires a camera, which is much smaller, lighter, and requires far less power than competing AR&D sensors. We have demonstrated the algorithms performance and ability to process flight-like imagery formats with a flight-like trajectory, positioning ourselves to easily process flight data from the upcoming ISS Selfie activity and then compare the algorithms quantified performance to the simulated imagery. This will bring visual odometry beyond TRL 5, proving its readiness to be demonstrated as part of an integrated system.Once beyond TRL 5, visual odometry will be poised to be demonstrated as part of a system in an in-space demo where relative pose is critical, like Orion AR&D, ISS robotic operations, asteroid proximity operations, and more

Effects of Cross-Age Tutors With EBD for Kindergarteners At Risk of Mathematics Difficulties

Challenges with numerical proficiency at an early age can lead to substantial gaps in learning and are associated with detrimental long-term outcomes. In addition, students with emotional–behavioral disorders (EBD) can have some of the most challenging behavioral and academic needs to address. The purpose of this study was to identify the effects and collateral outcomes of utilizing cross-age tutors (i.e., older students) with/at risk of EBD to deliver a number line board game intervention to kindergarten students at risk of mathematics disabilities. A multiple baseline design across participants was utilized to evaluate the following research questions: (a) What are the effects of a number line game delivered by a cross-age tutor with EBD on the mathematics performance of kindergarten students with mathematics difficulties? (b) Can students with EBD implement tutoring procedures with fidelity? (c) What are the effects of the cross-age tutoring training and implementation on the tutors’ classroom behaviors and risk-status for EBD? Tutoring sessions took place for 25–30 min, 3 times per week, over 10 weeks. Results suggest cross-age tutoring to be an effective and feasible model for improving mathematics performance of at-risk kindergarteners and, to a lesser extent, the behavioral performance of students with EBD

Seeker Free-Flying Inspector GNC System Overview

Seeker is an ultra-low cost approach to highly automated extravehicular inspection of crewed or uncrewed spacecraft that has been designed and built in-house at the NASA Johnson Space Center (JSC). The first version of Seeker is intended to be an incremental development towards an advanced inspection capability. This effort builds on past free-flying inspector development efforts such as the Autonomous Extravehicular Activity Robotic Camera Sprint (AERCam Sprint) and Mini AERCam. Seeker was funded as an International Space Station (ISS) "X-by" Project, which required delivery of the vehicle approximately one year after authority to proceed and within the budget of $1.8 million. Seeker will fly onboard the NG-11 Cygnus mission in 2019 and will deploy after Cygnus' primary mission is completed. Seeker will perform inspection-like maneuvers within 50 meters of the target vehicle (Cygnus) and then dispose itself. The Seeker Guidance, Navigation, and Control (GNC) system is composed entirely of commercial off-the-shelf (COTS) and space-rated COTS items, an inertial-relative Multiplicative Extended Kalman Filter (MEKF), point-to-point guidance (with various additional modes such as stationkeeping), proportional-integral translational control, phase plane rotational control, and a state machine for automated mission moding with minimal ground input

Prospects for Finland and Sweden to pursue closer defense cooperation with NATO

This thesis examines the potential advantages for Finland and Sweden in pursuing closer cooperation with the North Atlantic Treaty Organization (NATO) and possible membership. The security policy objectives of Finland and Sweden have largely been defensive in nature: to ensure national survival and protection of sovereignty. With the exception of Finland's opposition to the Soviet Union's aggression in 1939–1940 and 1941–1944 to defend its national independence, both countries have remained neutral in foreign and security policies. Sweden's geopolitical situation is advantageous in that the Baltic Sea hinders invasion and the country has positive relations with its immediate neighbors. In contrast, Finland shares a lengthy border with Russia and has a complex history of relations with Moscow. In 2009, Sweden pledged a Declaration of Solidarity that protects its neighboring Nordic states as well as European Union (EU) member states in an effort to strengthen and preserve peaceful relations and stability. The thesis concludes that the benefits of closer cooperation with the Alliance and possible membership, notably collective defense protection under Article 5 of the North Atlantic Treaty, are substantial. Russia's recent aggressive behavior may lead Finland and Sweden to seek closer cooperation with NATO and to give greater attention to the option of membership.http://archive.org/details/prospectsforfinl1094550465Lieutenant, United States NavyApproved for public release; distribution is unlimited

Students With Emotional–Behavioral Disorders as Cross-Age Tutors: A Synthesis of the Literature

The purpose of this quantitative synthesis was to evaluate the effectiveness and related outcomes of the cross-age tutoring model when students with or at risk for emotional–behavioral disorders (EBD) serve as tutors. Research questions were posed to identify the shared and unique components (e.g., dosage, tutor training) of the cross-age tutoring model; the extent to which students with EBD can effectively serve as cross-age tutors (i.e., fidelity of implementation and tutees’ improvement); the extent to which the model was effective in promoting desired academic and/or social–emotional–behavioral outcomes for tutees and tutors with EBD; the generalization, maintenance, and social validity of the effects; and the overall methodological quality and rigor of the included studies. Findings showed common training and instructional components across interventions and that tutors with EBD can implement cross-age tutoring procedures with fidelity. The cross-age model was shown to be effective in promoting academic and social–behavioral skills for the tutees as well as the tutors. Evidence for effectiveness in improving self-concept and attitude of the tutor with EBD was inconsistent. Implications and future research considerations are discussed