Latest Space News
Fri, 04 Dec 2020 18:44:41 +0000
China’s Chang’e-5 spacecraft are preparing for a first-ever robotic rendezvous and docking in lunar orbit, a major hurdle to delivering lunar samples to Earth. SpaceNews
Fri, 04 Dec 2020 18:26:03 +0000
When Virgin Galactic’s SpaceShipTwo takes to the skies above New Mexico later this month, it will do so without the crowds and publicity once expected for the historic flight. SpaceNews
Fri, 04 Dec 2020 18:23:05 +0000
As the Biden administration looks to rejoin international initiatives and reemphasize major global initiatives, it is critical that the incoming administration recognizes and recommits to the role that space technology plays in these efforts. SpaceNews
Fri, 04 Dec 2020 17:16:48 +0000
The commercial market is now driving almost all innovation in space technology. The government can pivot its practices to more quickly adopt the best from the market.  SpaceNews
Fri, 04 Dec 2020 13:06:12 +0000
Blue Origin has achieved a new milestone in the development of the engine that will power the lunar lander it seeks to provide for NASA’s Artemis program. SpaceNews
Fri, 04 Dec 2020 11:42:27 +0000
Two days after its dramatic collapse, National Science Foundation officials said it is too soon to determine whether the giant radio telescope at Arecibo Observatory will be, or should be, replaced. SpaceNews
Fri, 04 Dec 2020 00:20:49 +0000
NASA has made awards to four companies worth exactly $25,001 to obtain lunar samples, part of an effort by the agency to establish a precedent for ownership and use of space resources. SpaceNews
Fri, 04 Dec 2020 00:18:56 +0000
House and Senate negotiators on Dec. 3 released a compromise version of the National Defense Authorization Act for Fiscal Year 2021. SpaceNews
Thu, 03 Dec 2020 17:03:02 +0000
Air-launch startup Aevum on Dec. 3 unveiled Ravn X, the drone aircraft that will serve as the first stage of its smallsat launch system.  SpaceNews
Thu, 03 Dec 2020 16:13:42 +0000
Rep. Mike Rogers (R-Ala.) on Dec. 3 was officially selected as the ranking member of the House Armed Services Committee in the 117th Congress. SpaceNews
Thu, 03 Dec 2020 12:31:42 +0000
The White House is asking Congress to remove language from an appropriations bill that would direct NASA to launch the Europa Clipper mission on the Space Launch System as a long-running dispute on how to launch the mission nears its conclusion. SpaceNews
Wed, 02 Dec 2020 22:35:45 +0000
Gen. John Raymond said the Space Force is close to finalizing the layout of its future acquisitions command, a large organization that will consolidate multiple agencies that currently operate independently.  SpaceNews
Wed, 02 Dec 2020 21:52:30 +0000
The European Space Agency (ESA) has finalized an 86 million euro ($104 million) contract with Swiss start-up ClearSpace SA to complete the world's first space debris removal mission.  SpaceNews
Wed, 02 Dec 2020 21:51:02 +0000
China this week is conducting a robotic lunar sample return mission, something the United States has never done. The mission is proceeding while a Chinese lunar rover is wrapping up its second year of service on the moon — on its far side, something also never done by the United States. SpaceNews
Wed, 02 Dec 2020 17:38:46 +0000
The Senate Commerce Committee voted Dec. 2 to advance the nomination of Greg Autry to be NASA’s chief financial officer, a position that he may only fill for several weeks. SpaceNews
Wed, 02 Dec 2020 14:31:47 +0000
Space Perspective, a startup planning to offer tourists trips to the edge of space in a high-altitude balloon, has raised $7 million in a seed round that will allow the company to test its technologies. SpaceNews
Wed, 02 Dec 2020 11:00:17 +0000
The Biden administration should support U.S. space activities while abandoning divisive and antagonistic rhetoric, says a new report from the Secure World Foundation. SpaceNews
Wed, 02 Dec 2020 10:05:49 +0000
Lockheed Martin announced Dec. 2 it has competed production of the fifth satellite of the Space Based Infrared System constellation. SpaceNews
Wed, 02 Dec 2020 04:02:18 +0000
An Arianespace Soyuz rocket successfully launched a reconnaissance satellite for the United Arab Emirates Dec. 1 after months of delays caused by technical problems and the pandemic. SpaceNews
Tue, 01 Dec 2020 22:33:24 +0000
The U.S. Space Force sees a “huge opportunity” to buy commercially developed technologies and services, Gen. John “Jay” Raymond said Dec. 1. SpaceNews
More space news...
19987 cvs - 654 jobs

LOOKING FOR A JOB?

  • HOME
  • POST YOUR CV
  • JOB SEARCH
  • LOOKING FOR STAFF?

  • HOME
  • REGISTER
  • CV SEARCH
  • POST JOBS
  • CV: Principal Systems Engineer

    Printer Friendly


    << BACK

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


    Registering is the only way of posting vacancies and obtaining contact details of candidates in our CV database.

    All it takes is a few minutes and a credit card (Visa or American Express). To sign-up to this service, simply click on the Register link and fill in the form. You will then have instant access to our system after on-line payment where you will be able to complete the transaction in either US Dollars, UK Pounds or Euros.

    All online credit/debit card transitions are handled through our secure third party payment processors at WorldPay. Worldpay are part of The Royal Bank of Scotland Group, the 5th biggest banking group in the world, WorldPay payment solutions are trusted by thousands of businesses, big and small worldwide. 

    Pricing starts at €450 (approx £400 or US$500 - use the convert tool for an exact conversion) for one month unlimited job postings and unlimited CV database access (for one user), with package discounts available if you have more permanent recruiting needs. For example, a Gold subscription will give you unlimited jobs posting and unlimited CV database access for one year at just over €250 per month!

     

    2020 Pricing Structure (excluding VAT):

    1 month - Discovery 450 euros convert
    3 months - Bronze 1150 euros convert
    6 months - Silver 1950 euros convert
    12 months - Gold 3200 euros convert

     

    If online payment is not convenient, give us a call at +33(0)622757477 or send us an email at sales@space-careers.com. We will set up an account for you and invoice you. Note that you can also pay through PayPal.

     

    Subscriptions

     

    Please note that the posting of academic positions is free of charge. All you need to do is email us your job description and we will post it for you.

     

    VAT:

    Spacelinks is based in France so the following European Union regulations regarding electronic commerce apply:
    - if your business is located outside the EU, VAT does not apply to you
    - if your business is located in France, you will be charged a 20% VAT
    - if your business is located in the EU and you don't have a valid VAT registration number, you will be charged a 20% VAT
    - if your business is located in the EU and you do have a valid VAT registration number, you won't be charged VAT provided you give us your VAT number (mandatory for invoicing)

     

    Support:

    For sales enquiries and general information, you can call us on +33(0)622757477.
    Support is available Mon-Fri on +33(0)622757477 or via email. Out-of-hours support is provided only via email.

    Please also note that we are located in France. Our normal office hours are 09:00 to 18:00 Monday to Friday. France timezone is GMT+1.

     

    Warning:

    We are very serious about our job seekers privacy so only legitimate recruiters and employers are eligible for a recruiter account. All subscriptions requests will be manually approved and recruiter accounts constantly monitored. Users who enter inaccurate or incomplete information will not gain access to post jobs or search resumes. Sharing of login details with a third party will result in the suspension of the recruiter's account with no subscription refund.

    To ensure you are approved, please include the following on your application:
    * The website address of your Company. Under construction websites will be rejected.
    * Email - Must end in @yourcompany.com. Applications using free email accounts such as Hotmail, Yahoo or Gmail will be rejected.

    Individual exceptions can be made on a case by case basis by emailing sales@space-careers.com. Accounts found not to be in compliance will be deleted.

     
    Terms & ConditionsCopyright ©2020 Spacelinks
    Web Analytics