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Sat, 02 Jul 2022 08:15:31 +0000
Virgin Orbit successfully placed a set of payloads for the U.S. Space Force into orbit early July 2 in the company’s first nighttime launch. The post Virgin Orbit launches Space Force mission appeared first on SpaceNews.
Fri, 01 Jul 2022 23:41:36 +0000
A United Launch Alliance Atlas 5 rocket on July 1 launched the USSF-12 mission for the U.S. Space Force. The rocket lifted off at 7:15 p.m. Eastern from Space Launch Complex-41 at Cape Canaveral Space Force Station, Florida. The post ULA’s Atlas 5 launches U.S. Space Force experimental missile-warning satellite appeared first on SpaceNews.
Fri, 01 Jul 2022 17:51:14 +0000
Agile Space Industries is preparing to consolidate propulsion design, manufacturing and production in a new 1,860-square-meter facility in Durango, Colorado. The post Agile to consolidate operations in new Colorado plant appeared first on SpaceNews.
Fri, 01 Jul 2022 11:52:51 +0000
OneWeb will launch some of its next-generation satellites on Relativity Space’s next-generation launch vehicle starting as soon as 2025, the companies announced June 30. The post OneWeb to launch second-generation satellites with Relativity Space appeared first on SpaceNews.
Fri, 01 Jul 2022 08:02:00 +0000
The Chinese Academy Sciences is preparing to select a new batch of space missions from proposals to study Earth, the Sun and solar system, and the deeper universe as part of a "New Horizons Program." The post Venus orbiter, lunar constellation and exoplanets telescopes among candidates as China selects new space science missions appeared first on SpaceNews.
Fri, 01 Jul 2022 00:40:15 +0000
House appropriators eliminated most of a proposed budget increase for the FAA’s commercial space transportation office while also directing the agency on spaceports and cooperation with another agency on spaceflight investigations. The post House appropriators reduce proposed budget for FAA commercial space office appeared first on SpaceNews.
Thu, 30 Jun 2022 23:59:09 +0000
Canada’s Kepler Communications said June 30 it plans to use D-Orbit’s orbital transfer vehicle for the next two satellites in its low-data-rate constellation. The post Kepler books orbital transfer vehicle for next launch appeared first on SpaceNews.
Thu, 30 Jun 2022 10:43:02 +0000
Chinese state-owned and commercial companies are developing capabilities to launch liquid propellant rockets from sea platforms to boost the country's launch options. The post China looks to launch liquid propellant rockets from the seas appeared first on SpaceNews.
Thu, 30 Jun 2022 01:32:19 +0000
With commissioning of the James Webb Space Telescope nearly complete, project officials and NASA leadership promise the telescope’s first images will stun scientists and the public alike. The post NASA prepares to release first JWST science images appeared first on SpaceNews.
Wed, 29 Jun 2022 21:50:47 +0000
SpaceX launched the first television broadcast satellite under SES’s C-band clearing plan June 29 from Cape Canaveral in Florida. The post SpaceX launches SES-22 C-band replacement satellite appeared first on SpaceNews.
Wed, 29 Jun 2022 20:48:28 +0000
NASA Administrator Bill Nelson has tested positive for COVID-19, he announced June 29, but is continuing to lead the agency as he isolates at home. The post NASA administrator tests positive for COVID appeared first on SpaceNews.
Wed, 29 Jun 2022 19:36:38 +0000
Space Force acquisition executive Frank Calvelli said he would be open to a different model than the current two-vendor approach for national security launch services procurement The post Space Force considering strategy for procuring national security launch services appeared first on SpaceNews.
Wed, 29 Jun 2022 19:08:21 +0000
Former NASA deputy administrator Lori Garver has written a book about her time at the agency. Rand Simberg reviews the book with a focus on Garver’s efforts to put NASA on a new course that leveraged commercial capabilities. The post Escaping Gravity and the struggle to reshape NASA appeared first on SpaceNews.
Wed, 29 Jun 2022 14:38:11 +0000
Italian rocket maker Avio secured 340 million euros ($358 million) in government funding June 29 to develop launch vehicles for the next decade. The post Avio gets pandemic recovery funds to develop launchers for the 2030s appeared first on SpaceNews.
Wed, 29 Jun 2022 13:00:21 +0000
Sierra Space announced an agreement with the Turkish Space Agency and an affiliated company June 29 that could lead to cooperation on human spaceflight and lunar missions. The post Sierra Space signs agreement with Turkish Space Agency appeared first on SpaceNews.
Wed, 29 Jun 2022 02:48:35 +0000
The successful launch of a NASA lunar cubesat mission was the culmination of two and a half years of work at Rocket Lab that, the company’s chief executive says, could enable “ridiculously low cost” planetary missions. The post Rocket Lab sees payoff from CAPSTONE launch appeared first on SpaceNews.
Tue, 28 Jun 2022 23:21:42 +0000
Frank Calvelli said he wants to make sure Blue Origin and ULA understand 'the importance of hitting their milestones' for the BE-4 and Vulcan The post Space Force acquisition chief to meet with ULA and Blue Origin, expects Vulcan to launch in December appeared first on SpaceNews.
Tue, 28 Jun 2022 23:02:12 +0000
Virgin Orbit says it’s ready for a nighttime launch for the U.S. Space Force as it attempts to get into a more frequent rhythm of building and launching vehicles. The post Virgin Orbit ready for first night launch appeared first on SpaceNews.
Tue, 28 Jun 2022 18:15:27 +0000
Arianespace is looking to move Ovzon’s first satellite to another Ariane 5 after Eutelsat switched to a dedicated mission to launch sooner. The post Ovzon needs to piggyback another Ariane 5 ride for late 2022 launch appeared first on SpaceNews.
Tue, 28 Jun 2022 15:38:44 +0000
Chinese launch service provider Expace has secured $237 million in B round funding, following last week's return to flight of its Kuaizhou-1A solid rocket. The post Chinese commercial launch firm Expace raises $237 million appeared first on SpaceNews.
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  • CV: Principal Systems Engineer

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    Personal information
     Name:<withheld>
     Age:<withheld>
     Country:<withheld>
     Location:<withheld>
    Contact information
     Email:<withheld>
     Phone:<withheld>
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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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