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Thu, 20 Sep 2018 01:45:58 +0000
"It doesn't necessarily mean buying a company. It could be buying a product line. It could be buying a portion of a business that fits with us. We want to make sure that it's strategic." SpaceNews.com
Wed, 19 Sep 2018 23:51:28 +0000
Bezos: At a time of increasing global competition, “You have to be able to go to space more frequently, with less lead time." SpaceNews.com
Wed, 19 Sep 2018 23:32:28 +0000
Kleos Space, a company developing a constellation of satellites for radiofrequency geolocation work, will launch its first satellites in 2019 with Rocket Lab under a deal announced Sept. 19. SpaceNews.com
Wed, 19 Sep 2018 20:27:57 +0000
A Georgia county seeking to develop a spaceport has attracted a small launch vehicle company to set up operations and, hopefully, launch from there. SpaceNews.com
Wed, 19 Sep 2018 19:28:56 +0000
Shanahan on space reorganization: “We’re going to find the best way. There will be some hammering and arm wresting. " SpaceNews.com
Wed, 19 Sep 2018 15:12:29 +0000
Gen. Jay Raymond: “There’s an explosion of things happening in the commercial industry. We want to capitalize on that." SpaceNews.com
Wed, 19 Sep 2018 08:17:39 +0000
Boeing and SpaceX, who have been struggling to meet safety thresholds established by NASA for commercial crew vehicles, now believe their vehicles can meet those requirements as they prepare for test flights scheduled in the next several months. SpaceNews.com
Wed, 19 Sep 2018 03:39:09 +0000
Orbital Insight, a Silicon Valley geospatial analytics company, announced the purchase Sept. 18 of FeatureX, a Boston-based artificial intelligence firm specializing in computer vision for satellite imagery. The terms of the purchase were not disclosed. SpaceNews.com
Wed, 19 Sep 2018 01:11:48 +0000
Wilson suggested her proposal is only the opening salvo. “I expect there will be a lot of discussion about how to implement the president’s vision.” SpaceNews.com
Tue, 18 Sep 2018 18:14:02 +0000
Melanie Stricklan, Slingshot Aerospace: “We see a big need for SSA solutions, not just in the military but also in academia and in satellite owners and operators." SpaceNews.com
Tue, 18 Sep 2018 18:01:02 +0000
Air Force Secretary Heather Wilson’s Space Force proposal dropped on the first day of the Air Force Association’s Air Space Cyber symposium, and it took the community by storm. SpaceNews.com
Tue, 18 Sep 2018 18:00:33 +0000
The Air Force’s advocacy group, the Air Force Association, is taking off the gloves and pointedly voicing opposition to separating space out of the Air Force. SpaceNews.com
Tue, 18 Sep 2018 17:12:29 +0000
Three months after its inaugural meeting, the advisory group supporting the National Space Council is working to organize itself and identify topics for study while preparing for its next full meeting. SpaceNews.com
Tue, 18 Sep 2018 07:40:17 +0000
AFA: "Standing up a separate space bureaucracy amplifies the problem by driving more money to a headquarters function, not space operations. " SpaceNews.com
Tue, 18 Sep 2018 03:04:32 +0000
SpaceX announced Sept. 17 that a Japanese billionaire will be paying an undisclosed but significant sum to buy a flight of the company’s next-generation rocket for a flight around the moon carrying a group of artists. SpaceNews.com
Tue, 18 Sep 2018 01:00:54 +0000
Airline customers are well aware of the financial troubles plaguing satellite-enabled inflight connectivity providers. SpaceNews.com
Mon, 17 Sep 2018 23:18:08 +0000
Shotwell: “Failure is bad. But failure while you’re trying and you’re testing is not terrible. You’re learning from it.” SpaceNews.com
Mon, 17 Sep 2018 20:25:27 +0000
Ten years after then-U.S. Air Force Secretary Michael Wynne called for maximizing use of secondary payload adapters to launch small satellites on large rockets, the Air Force, NASA and the National Oceanic and Atmospheric Administration are working together to make that happen. SpaceNews.com
Mon, 17 Sep 2018 20:16:24 +0000
As the military sometimes must operate in contested environments, they will need more resilient communications system to overcome any intentional interference. SpaceNews.com
Mon, 17 Sep 2018 19:39:33 +0000
Satellite operators Yahsat of the United Arab Emirates, Brazil's Star One and Bermuda-based ABS are moving into new markets in Latin America and around the world, according to speakers at the World Satellite Business Week conference here Sept. 10. SpaceNews.com
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    Personal information
     Name:<withheld>
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    Contact information
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    Candidate Profile
     Date Submitted:03-03-2013
     Last Modified:03-03-2013 (08:20)
    Job information
     Current job:Principal Systems Engineer
     Employment Term:Permanent
     Job location:Anywhere
     Date available:immediately
     Industry:Satellite Manufacturers and Subcontractors, Satellite Operators, , , Consulting/Engineering Services, Space Tourism
     Keywordsorbit mechanics, astrodynamics, trajectory, orbit determination, satellite coverage, simulation, software development, FORTRAN, VMS, VAX
    CV

                                                                Professional Experience Summary

                                               Aerospace Engineer – Orbit Analyst – Software Engineer

    20+ years experience in orbital mechanics and astrodynamic analyses, design, simulation development and modeling with specialization in Orbit Determination (OD) and parameter estimation, and satellite constellation earth coverage design & analysis.

    Supported the SGT/Raytheon Orbit software program contract for the proposed New Space Fence, designed to maintain the catalog of space objects that are significantly smaller and many times more numerous than the current system. The program segments process design state of the art phased array radar high accuracy measurements which are in turn form 1) the initial single pass OD estimates, 2) compute correlation measures for earlier ephemeris and covariance estimates, 3) update correlated orbital ephemeris states and covariance, and 4) generate propagated ephemeris and covariance predictions at the Fence crossing time epochs.

    Supported the Naval Space Command DB15 OD Program (classified) software development & test, and configuration control for 13 years. The work included implementing software enhancements for 1) higher accuracy earth gravity and polar motion modeling, 2) extended duration satellite DV thrusting, 3) solar panel radiation pressure and panel dynamics 4) numerous other force modeling modifications, 5) implementation of modified Doppler measurement types, 6) robust and refined estimation techniques, and 7) responsible for the OD software installations and checkout at the mission ops ground support stations.

    Software test & development in support of a concept & design phase of a program for a unique open-loop Pitch Control attitude control program (PCS), formulated by Dr. J. Vahlberg which proved as a key development that extended the Navy/Air Force DB15 multi-constellation satellite mission many years beyond the expected mission life plan. The PCS program was developed as a workaround after critical satellite sub-system failures threatened to terminate the multi-satellite classified mission.

    Prior to working for SGT and Raytheon, Mr. Elsner worked for Lockheed Missiles & Space Co. (now, Lockheed-Martin) Space Systems Division Orbital Mechanics Dept. in Sunnyvale, CA. The work involved a variety of orbit analysis tasks and developing orbital software simulations employing general perturbation models. Primary focus included analysis and software simulation development for evaluating satellite & constellation earth coverage, satellite payload trade study performance assessments, and other studies for numerous proposed DOD and NASA satellite systems.

    Developed orbital simulations for deriving cross-range maneuver requirements for a proposed eight-man re-entry atmospheric lifting body vehicle (Assured Crew Return Vehicle, or ACRV) to serve as a lifeboat for the (then planned) International Space Station, or ISS. In addition, simulations were developed for demo and conducting trade studies and Monte-Carlo analysis for evaluating de-orbit landing site selection options.

    The above software development work and analysis were performed on a variety of computer platforms such as Alpha, SUN, and HP Workstations, as well as PC, VAX Mainframe, CRAY, and others. Operating systems included VMS, VAX, UNIX, and PC Windows. The programming was done primarily in FORTRAN 77 & 95, VMS/VAX command scripts, MS Windows batch scripts, and some C and UNIX.

    Sgt Inc., Greenbelt, MD              Aug 2007 – Aug 2012

    Principal Systems Engineer

    Provided software simulation development, modeling, and support for Raytheon/SGT proposed New Space Fence system.  The modeling and simulation tasks were performed on PC Windows platforms with computational programming code performed in FORTRAN 95 and PC Windows scripts.

    The Space Fence software development involved the programming, test, and analysis for automated functional blocks for orbit object sequenced OD processing, object correlations, and propagated orbit state and covariance. Scenarios for up to several hundred thousand orbit objects were simulated and the SGT program consistently correctly correlated objects much better than spec requirements.  The Space Fence task required knowledge of special perturbation (SP) earth orbit models, orbit determination (OD), covariance analysis, astrodynamic, Maximum Likelihood correlation, inertial & rotating coordinate systems and transformations, and implementation of the SGT and NASA Goddard GEODYN Precision OD program.  Software configuration control management was maintained for frequent program development enhancements and updates.

    Raytheon Technical Services Co.  Lanham, MD                Oct 1994 – Aug 2007

    Principal Systems Engineer

    Software enhancement modifications, testing and development of the Naval Space Command DB15 satellite surveillance system orbit determination (OD) program.  The primary responsibilities included the development & test, validation, software maintenance, and updates to the OD Estimation Program and the corresponding special perturbation (SP) orbit propagation program software executed at the global remote station sites.

    Enhancements to the DB15 OD Program provided orbital accuracy improvement on the order of 2-3x over the original operational program for the multi-satellite missions. Enhancements included implementing a 40x40 WGS84 earth gravity model; automated updates for earth spin axis orientation, removal of Doppler station survey biases, variable weighted fit-span option which demonstrated significantly improved orbit accuracy spanning solar/atmospheric events. In addition, programming changes for the Y2K transition epoch.

    Conducted a comprehensive error analysis studies to accurately model satellite thrusting force for long duration thrusts, as well as consecutive rev thrusting. This enabled mission planners more flexibility to command longer duration, larger V orbit adjust maneuvers with small ephemeris errors for remote station prediction accuracy.

    Provided a satellite station-keeping simulation program and software tools for the mission planners to much more accurately and optimally plan satellite station-keeping thrusts. The program utilized a position-velocity phase-plane control concept which resulted in reducing the total number of thrusts, maintaining tighter station-keeping control, and also provided advance alerts for mission planners when relative position rates were high.

    Created a simulation for optimizing satellite electrical power for reduced solar panel functionality when multiple solar panel step-motor failure events occurred on multiple satellites. The analysis led to implementing optimal fixed configurations for a range of angles (solar/orbit geometry) on multiple satellites. This operational implementation significantly restored the mission payload tasking level near the original spec for full panel function.

    Supported design phase testing and development of the PCS (Pitch-Control-System) open-loop attitude control program (devised by Dr. J. Vahlberg) that was the key factor in extending the mission life for the DB15 mission for up to 8 years beyond its designed life. Also provided PCS daily operations monitoring, optimized momentum wheel controls generation and working in concet with mission ops crews that extended the overall mission life.

    Lockheed Missiles & Space Co. (Lockheed-Martin) Sunnyvale,CA   1985 – 1994

    Sr. Research Engineer

    Supported orbit analysis tasks as part of the Space System Division (SSD) Orbital Mechanics Group on DOD and NASA proposed satellite programs, including SDI Boost Surveillance Tracking System (BSTS), MILSTAR, DMSP, ACRV (ISS), IRIDIUM, and numerous others.

    Specialization in satellite constellation design and earth coverage simulation tools, ground station revisit time analysis, derived BSTS (classified) payload earth coverage requirements. One of four team members that designed and developed Lockheed’s Integrated Coverage Analysis Program (ICAP) which provided broad program applicability and flexibility.

    Designed / implemented a simulation program for analysis and demo for deriving the ACRV manned re-entry spacecraft cross-range maneuver requirements and landing site options.

    Computers

    Computers:  ALPHA, PC WINDOWS, VAX Mainframe, CRAY, SUN, HP

    Languages/Applications:  FORTRAN 77 & 95,  VMS scripts, PC Windows scripts, C, WORD, EXCEL

    Education

    M.S., Aeronautical & Astronautical Engineering, University of Illinois, Urbana-Champaign, IL  1985

     B.A., Liberal Arts & Sciences Economics, University of Illinois, Urbana-Champaign, IL  1978

    Security Clearances

    DOD T.S. and SCI/Poly debriefed in 2011 at end of mission. DOD SECRET debriefed Aug 2012.


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