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Fri, 27 May 2022 21:42:55 +0000
SpaceX said May 27 that Nigeria has joined Mozambique as the first countries in Africa to approve its Starlink broadband services. The post Starlink approved in Nigeria and Mozambique, says Elon Musk appeared first on SpaceNews.
Fri, 27 May 2022 17:58:37 +0000
Ball Aerospace and Raytheon Intelligence & Space will begin developing ocean color sensors for the National Oceanic and Atmospheric Administration’s next generation of geostationary weather satellites under contracts announced May 26. The post Ball and Raytheon to develop NOAA ocean sensors appeared first on SpaceNews.
Fri, 27 May 2022 14:44:05 +0000
British small satellite startup Open Cosmos said May 27 it has secured European Space Agency funding to develop plans for a space weather monitoring constellation. The post UK’s Open Cosmos gets ESA funding for space weather constellation appeared first on SpaceNews.
Fri, 27 May 2022 13:48:10 +0000
The Philippines has approved plans that will see it become the first country in Southeast Asia to access SpaceX’s Starlink broadband services.  The post The Philippines gives green light to Starlink appeared first on SpaceNews.
Fri, 27 May 2022 13:28:44 +0000
Astroscale has secured European Space Agency funding for a 2024 demo mission to remove what will likely be a OneWeb satellite. The post Astroscale gets funds for 2024 debris-removal mission appeared first on SpaceNews.
Fri, 27 May 2022 12:41:17 +0000
China is looking to land spacecraft near permanently shadowed regions near the south pole of the moon to investigate the potential presence of resources trapped in craters. The post China targets permanently shadowed regions at lunar south pole appeared first on SpaceNews.
Fri, 27 May 2022 03:03:20 +0000
SpaceX will replace the heat shield on the next Crew Dragon spacecraft flying to the International Space Station after it failed inspections, but NASA says there is no risk of a similar problem for the spacecraft currently at the station. The post SpaceX replacing heat shield on upcoming Crew Dragon mission after failed test appeared first on SpaceNews.
Thu, 26 May 2022 22:08:57 +0000
General Dynamics Mission Systems won a $324.5 million contract to operate the ground systems and manage network operations of the Space Development Agency’s low Earth orbit constellation. The post General Dynamics wins ground systems contract for Space Development Agency’s megaconstellation appeared first on SpaceNews.
Thu, 26 May 2022 20:47:31 +0000
The Space Systems Command announced May 26 the official rollout of a new process to assess the cybersecurity of commercial satellite operators that do business with the Defense Department.  The post Space Force rolls out cybersecurity standards for commercial providers of satellite services appeared first on SpaceNews.
Thu, 26 May 2022 18:52:20 +0000
Broader economic issues as well as the performance of some space companies could slow the growth of the industry in the next few years, executives warn. The post Economy could dampen growth of space industry appeared first on SpaceNews.
Thu, 26 May 2022 16:43:33 +0000
Spacecraft developers are additively manufacturing engine nozzles and other complex spacecraft components. The post Additive manufacturing has progressed far beyond brackets appeared first on SpaceNews.
Thu, 26 May 2022 11:52:05 +0000
SpaceX launched several dozen payloads on its fifth dedicated rideshare mission May 25, illustrating the continued demand for such missions even as dedicated small launch vehicles emerge. The post SpaceX launches Transporter-5 dedicated smallsat rideshare mission appeared first on SpaceNews.
Thu, 26 May 2022 00:31:38 +0000
A panel of space logistics experts underscored the importance of open standards to encourage the growth of the market. The post Space logistics experts broadly endorse standards appeared first on SpaceNews.
Wed, 25 May 2022 23:18:59 +0000
Boeing’s CST-100 Starliner safely landed in New Mexico May 25, concluding a six-day uncrewed test flight to the International Space Station. The post Starliner concludes OFT-2 test flight with landing in New Mexico appeared first on SpaceNews.
Wed, 25 May 2022 21:28:28 +0000
Gogo is planning to use OneWeb satellites in a partnership that could see it take on Starlink in an emerging business aviation market for low Earth orbit services.  The post Gogo’s OneWeb partnership could face Starlink in business aviation market appeared first on SpaceNews.
Wed, 25 May 2022 21:13:16 +0000
Virgin Orbit expects to perform its first launch from England in late August, pending award of a British launch license, a company executive said May 25. The post Virgin Orbit expects first U.K. launch in August appeared first on SpaceNews.
Wed, 25 May 2022 17:02:37 +0000
The National Reconnaissance Office announced May 25 it awarded BlackSky, Maxar Technologies and Planet Labs 10-year contracts to provide satellite imagery for U.S. intelligence, defense and federal civil agencies. The post BlackSky, Maxar, Planet win 10-year NRO contracts for satellite imagery appeared first on SpaceNews.
Wed, 25 May 2022 16:17:17 +0000
As governments make slow progress on space traffic management systems, companies may be able work together more quickly to develop processes to support space sustainability. The post Industry looks to decentralized approaches to space sustainability appeared first on SpaceNews.
Wed, 25 May 2022 11:26:15 +0000
Launcher won a $1.7 million contract from the U.S. Space Force that will assist the company’s development of a high-performance rocket engine for its small launch vehicle. The post Launcher wins Space Force contract to support engine development appeared first on SpaceNews.
Wed, 25 May 2022 09:18:09 +0000
Supply chain disruptions continue to pose a challenge for the space industry, but some see those disruptions as an opportunity for new approaches and innovation. The post Supply chain challenges also present opportunities for the space industry appeared first on SpaceNews.
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  • CV: GNC Engineer

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    Personal information
     Name:<withheld>
     Age:<withheld>
     Country:<withheld>
     Location:<withheld>
    Contact information
     Email:<withheld>
     Phone:<withheld>
     Mobile:<withheld>
    Candidate Profile
     Date Submitted:01-01-2012
     Last Modified:01-01-2012 (07:23)
    Job information
     Current job:GNC Engineer
     Employment Term:Either
     Job location:Own country
     Date available:immediately
     Industry:Satellite Manufacturers and Subcontractors, Satellite Operators, , , Launch Systems
     KeywordsI am the only GNC Engineer able to tune guidance and control systems for complex aerospace maneuvers without using gain scheduling.
    CV
    RESEARCH AND DEVELOPMENT SCIENTIST/ENGINEER
    Guidance, Navigation, and Control Algorithms ~ Software Development ~ Computational Theory and Design ~ System Analysis and Simulation ~ Proposal Development
     
    Secret Security Clearance 
     
    DISTINGUISHED ACHIEVEMENT
    Linear Time Invariant (LTI) Six Degree of Freedom Differential Equations:
    Only scientist/engineer in the world who can devise GNC algorithms for difficult aerospace maneuvering scenarios without using gain scheduling or other types of nonlinear control.
    Currently developing a full fidelity 6-DOF state feedback control loop with constant gains using quaternion mathematics to separate inertial and body rotational dynamics.
    Also developing a quaternion Kalman filter with constant Kalman gains.
     
    PROFESSIONAL SUMMARY
    Guidance, Navigation, and Control (GNC) Engineer                                    2010 to 2011
    Masten Space Systems, Mojave, CA
    Six degree of freedom (6-DOF) suborbital vertical takeoff vertical landing (VTVL) rocket flight simulation
    o Created flight profiles up to 30 km in altitude in preparation for NASA CRuSR launches.
    o Modified vehicle properties (mass properties, engine characteristics, rcs, etc.) and analyzed simulation results for new suborbital VTVL rocket to ensure attitude control system stability and nominal mission conditions.
    o Determined abort and terminate parameter limits using simulation trajectory results.
    Hardware in the Loop (HWIL) simulation
    o Validated flight profiles up to 5 km in altitude for NASA CRuSR launches.
    o Analyzed simulation results for planned vehicle flight tests to ensure parameters were properly set.
    o Validated abort and terminate parameter limits using simulation results.
    Operational engine/vehicle testing
    o Issued commands remotely to onboard flight management system (activating/deactivating valves, testing various engine components, initiating engine ignition) during field testing.
    o Created a checklist with step by step instructions for rocket flight preparations and suggestions for dealing with off nominal conditions.
    NASA SBIR Proposal Submission (Navigation Flight Dynamics Software and Technologies Topic)
    o Proposed using a quaternion exponential Kalman (QEK) filter to map the nonlinear state equations to an equivalent linear space to meet NASA’s objective of improving the navigation filter for GNC systems.
     
    Guidance, Navigation, and Control (GNC) Engineer                               2008 to 2009
    Miltec Missiles and Space, Huntsville, AL
    Foreign anti-tank 6-DOF missile simulation
    o Debugged and modified existing 6-DOF missile simulation developed in C++.
    o Tested simulation autopilot with step commands, zero acceleration and step acceleration commands.
    o Modified and debugged line of sight (LOS) proportional derivative guidance subroutine using azimuth and elevation angles to the missile and target, including guidance gain tuning for trajectory optimization.
    o Integrated missile simulation into a package containing a scene generator and a missile/target tracker, including synchronizing the different applications and retuning the guidance gains.
    o Developed a roll autopilot to keep the missile at a zero roll angle.
    o Shot missile ten degrees off boresight from the target to test the guidance system and autopilot.
    Upper atmospheric hypersonic glider 6-DOF simulation
    o Conducted linear stability analysis on glider endo- and exo-atmospheric maneuvers.
    o Conducted research into and began development of a dynamic inversion autopilot.
    o Began applying quaternion exponentials to autopilot design to improve control system robustness
     
    Doctoral Student Research Assistantship, Old Dominion University, Norfolk, VA                           2003 to 2008
    Invented a new type of eigenvalue for quaternion mathematics to facilitate development of a linear time invariant (LTI) set of 6-DOF equations.  Currently formulating a quaternion frequency domain method of solution.
    Dissertation research in inertial guidance, navigation and attitude control.
    Presented conference papers at professional AIAA conferences/exhibits.
     
    Research Scientist and Engineer (Mathematician)                                         1990 to 2003
    Naval Surface Warfare Center, Dahlgren Division, Dahlgren, VA                                                               
    SLBM Research and Analysis Division
    o Developed a simulation for an experimental flapped re-entry body and analyzed the resulting trajectory.  
    o Reduced 6-DOF reentry simulation execution time by two-thirds by fitting a time varying sine wave to the quaternion components and switching the state vector from angular velocity to quaternion first derivative.
    o Investigated further 6-DOF modifications using quaternion mathematics.  
    o Developed methods of optimizing EMP attacks.
    o Researched application of genetic algorithms, simulated annealing, and other combinatorial algorithms to sequencing and grouping of missile attacks.
    o Analyzed terrain effects on the fuzing system, and conducted other fuze studies.
    o Developed a graphical program for analyzing plume impingement on re-entry bodies.
    SLBM Software Development Division
    o Developed various systems and applications software programs.
    o Replaced the Runge-Kutta method with a predictor-corrector method in a 6-DOF re-entry simulation in the upper part of the atmosphere and combined with other modifications to reduce the execution time by 85%.
    o Developed an object-oriented 6-DOF re-entry simulation.
     
    Career Note: Additional Position as Systems Engineer (Contractual) for Aerodyne Industries, LLC 
    Antares six degree of freedom launch vehicle simulation
    o Added Monte Carlo capabilities for mass properties dispersions of launch vehicle elements.
     
    Education
     
    Ph.D. in Aerospace Engineering, Old Dominion University, admitted to candidacy, expected graduation              Fall 2011
    Norfolk, VA
     
    Ph.D. work in Computational Sciences and Informatics (Mathematics track), George Mason University,            1995-2000
    Fairfax, VA
     
    Master of Science in Computer Science, Virginia Polytechnic Institute and State University,                      December 1994
    Blacksburg, VA
     
    Bachelor of Science in Mathematics (computational track), Pennsylvania State University, State College, PA    May 1990
     
    Publications
     
    Davailus, G.P.; “Linear Time Invariant Formulation of the Gyroscopic Problem using Quaternion Mathematics”. AIAA-2011-1224, 49th AIAA Aerospace Sciences Meeting; Orlando, FL., January 2011
     
    Davailus, G.P.; Newman, B.A.; “The Application of Quaternion Algebra to Gyroscopic Motion, Navigation, and Guidance”, AIAA-2005-5945, AIAA Guidance, Navigation, and Control Conference and Exhibit; San Francisco, CA., August 2005
     
    Davailus, G.P.; “The Transformation of Oscillatory Equations in Six Degree of Freedom Trajectory Simulations Involving Coordinate Transformations”, M.S. Thesis, Department of Computer Science, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 1994.

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