Addendum to resume John Smay: This addendum is intended to detail some of my experience and unique efforts in the consulting engagements since retirement from Hughes Space & Communications in 1999.

1999-02 SES Astra: Support of build, test, and launch mission for two Astra 2D & 3A GEO dual-spin attitude control communication satellites. Due to addition of commercial spacecraft to the US Munitions List (ITAR), spent a large amount of time in 1999 learning how and going through the application and approval process to obtain a Technical Assistance Agreement (TAA), License from the US Department of State to support Astra and Bristol Aerospace. I may have the first such license awarded to an individual for commercial spacecraft support.

2000 Scisat: Performed as mission and attitude control consultant to Bristol Aerospace, Canada for this program. This LEO scientific satellite employed star tracker, reaction wheel, and magnetic control. A major ACS feature was to test the device called Gyro-Wheel which attempted to use a single wheel as both sensor, gyro, and actuator, as reaction wheel. Developed extensive simulations in fortran of the vehicle dynamics, thruster, wheel, and magnetic sensing and control systems.

2000-01 XMRadio: Build and test monitor, ACS and mission technical consulting through build and launch of 1^st two XM sats, “Rock” and “Roll.” These were Hughes HS702 body-stabilized momentum-bias design.

2001 Artemis: The Artemis spacecraft was left in an anomalous low orbit by an under performing Ariane launch vehicle. I was on a two person consulting team that went to Rome to review, consult and advise, Alenia Spazio and the Italian Space Agency (ASI) in the spacecraft recovery mission. A large part of this mission was eventually recovered.

2001-03 New Skies: Similar to XMRadio. On this project, Hughes/Boeing had just discontinued the HS702 solar concentrator and greatly increased solar array area to compensate. I developed a detailed simulation in fortran of the pitch axis vehicle and solar array with detailed stepper motor model to verify no mis-stepping or backward stepping of the array drive dynamics.

2002-03 Eutelsat: Employed by Hughes/Boeing for eBird similar to Astra above.

2004-07 Boeing Space & Information Systems: On this classified program, X-B37, I worked about half-time over this period in the disciplines of multi-body large angle dynamics and in transmission of noise and disturbances through a spinning interface to a precision payload.

2007-08 Lunar X Prize: For about 18 months at the inception of the Lunar X Prize competition I was a member of the small team, Southern California Selene Group (SCSG) led by Dr. Harold Rosen http://lunar.xprize.org/teams/scsg/about . During this time I developed a dynamic model and simulation of our dual-spin lander approach and touch down (available on request). Dr. Rosen withdrew the team from the competition in June 08.

2009-11 GPS: GPS is a MEO sun-nadir steered navigation spacecraft built by Boeing. In 2009 when some mass property measurements violated expectations I was commissioned to perform an analysis to define boundaries. In support of extensive analysis, I developed and exercised detailed 3-axis simulations of the operational wheel control mode and velocity maneuver thruster control mode along with numerous failure scenarios.

2010 Skybox: Interviewed with these guys in Mountain Home but they passed on my services!

2011-12 SMAP JPL: SMAP is a NASA/JPL LEO, zero momentum, dual-spin satellite for soil moisture mapping, launched in early 2015. It had a very large flexible spinning payload (20 ft antenna). I consulted of the spin control system hardware, control system design, and overall spacecraft dynamics.

2013 Soladaridad: Employed by Lockheed-Martin review and participate in life extension maneuvers in Mexico. This was a satellite well past its contract life with only a whisper of propellant remaining for which a very clever maneuver scenario was developed to keep in service for a certain class of customers for several years.

2019 Saturn/NovaWurks: Prepared and submitted a draft spacecraft attitude & velocity control performance Nav.ACS12doc.pdf requirements definition. Experience with low thrust, electric propulsion, orbit raising from LEO to GEO.

2021 Space Logistics (Northrup Grumman): Working through SCI supported Hughes Network Systems investigation of GEO satellite life extension via. rendezvous and docking with Grumman Mission Extension Vehicle (MEV). Work in orbital rendezvous and attitude dynamics.

2022: 6-10 BeetleSat: 240 LEO communication satellite constellation. Evaluation of coverage, constellation establishment, stability, collision avoidance, and stationkeeping.

2023: 11-12 CelestNet (Crean Inc.): Support of Moon transit, Moon orbit injection, and attitude and orbit maintenance in all phases of Moon satellite operation. Orbit design, implementation and mission attitude determination and control.