Latest Space News
Wed, 22 Nov 2017 00:00:00 +0100
The vault-like, 40-foot diameter, 40-ton door of Chamber A at NASA's Johnson Space Center in Houston was unsealed on November 18, signaling the end of cryogenic testing for NASA's James Webb Space Telescope. The historic chamber's massive door opening brings to a close about 100 days of testing for Webb, a significant milestone in the telescope's journey to the launch pad. The cryogenic vacuum test began when the chamber was sealed shut on July 10, 2017. Scientists and engineers at Johnson pu...
Tue, 21 Nov 2017 16:05:00 +0100
Europe's next four Galileo navigation satellites and the Ariane 5 rocket due to lift them into orbit are being readied for their 12 December launch from Europe's Spaceport in Kourou, French Guiana. Tuesday saw Galileo satellites 19-22 declared ready for flight, along with their Ariane. Combined activities are now under way, culminating in the satellites meeting their rocket in the Final Assembly Building. The satellites were flown in pairs to French Guiana last month. Once safely unboxed i...
Tue, 21 Nov 2017 14:26:00 +0100
A mini-rover, tools once used on the Moon and lasers for 3D mapping are in the backpack of the explorers of tomorrow. The terrain will be hazardous and it will be dark in volcanic caves, but this equipment could one day help to scout other planets. The alien-like landscapes of Lanzarote, Spain, are almost surreal but this volcanic island is helping to bring future space missions to reality. This month, an expedition with a dozen of experiments mobilised 50 people and four space agencies du...
Tue, 21 Nov 2017 14:00:00 +0100
ViaSat Inc. (NASDAQ: VSAT), a global broadband services and technology company, announced today it has expanded its current relationship with authorized value-added reseller Satcom Direct (SD), to offer ViaSat's full suite of in-flight connectivity (IFC) systems and services to large and mid-cabin business jets. The new agreement adds ViaSat's latest Ka-band business jet service to SD's IFC portfolio, which already included ViaSat's global Ku-band IFC service. ViaSat's Ka-band service is expecte...
Tue, 21 Nov 2017 00:00:00 +0100
We are proud to announce the third annual Maritime Reconnaissance and Surveillance Technology conference will be held in Rome from the 30th-31st January 2018. Download Conference Agenda | Register to attend this Conference Reconnaissance and Surveillance are key to developing clear and accurate maritime situational awareness. In order to maximise their ISR range, Navies and Maritime agencies around the globe are looking beyond the atmosphere to provide new and advanced surveillance capabil...
Mon, 20 Nov 2017 20:47:00 +0100
The propulsion system of the light-weight Angara 1.2 Launch Vehicle Service Module, manufactured by the Khrunichev Space Center (part of ROSCOSMOS State Corporation), completed successful hot-fire testing at the Federal State Enterprise "Rocket & Space Industry Research & Test Center" (RSI RTC) test facility (Peresvet, Moscow Region). The hot-fire tests are the most important and final stage of ground based propulsion system tests prior to flight testing. During the tests, specialists from...
Mon, 20 Nov 2017 17:00:00 +0100
For the first time ever astronomers have studied an asteroid that has entered the Solar System from interstellar space. Observations from ESO's Very Large Telescope in Chile and other observatories around the world show that this unique object was traveling through space for millions of years before its chance encounter with our star system. It appears to be a dark, reddish, highly-elongated rocky or high-metal-content object. The new results appear in the journal Nature on 20 November 2017. ...
Mon, 20 Nov 2017 16:30:00 +0100
Harris Corporation (NYSE:HRS) has partnered with NASA's Johnson Space Center to successfully complete thermal vacuum testing for the James Webb Space Telescope - validating its ability to operate in the frigid space environment. The Webb telescope will be the premier space observatory of the next decade, and will study galaxy, star and planet formation in the universe. Harris' team helped safeguard the telescope in Houston during Hurricane Harvey and ensured uninterrupted testing - including ...
Mon, 20 Nov 2017 14:31:00 +0100
Orbital ATK (NYSE:OA), a global leader in aerospace and defense technologies, contributed to the successful launch of a United Launch Alliance Delta II rocket as it lifted off Saturday from Vandenberg Air Force Base, California, carrying the first Joint Polar Satellite System (JPSS-1) spacecraft. Orbital ATK's contributions to the Delta II include nine Graphite Epoxy Motors (GEM 40) and a large composite fairing for the rocket. This event marks the penultimate launch of the Delta II rocket. It i...
Mon, 20 Nov 2017 00:00:00 +0100
Twice as big as Earth, the super-Earth 55 Cancri e was thought to have lava flows on its surface. The planet is so close to its star, the same side of the planet always faces the star, such that the planet has permanent day and night sides. Based on a 2016 study using data from NASA's Spitzer Space Telescope, scientists speculated that lava would flow freely in lakes on the starlit side and become hardened on the face of perpetual darkness. The lava on the dayside would reflect radiation from th...
Sat, 18 Nov 2017 13:03:00 +0100
Today, NASA launched NOAA's next-generation polar satellite, the Joint Polar Satellite System-1, into space. Two Raytheon (NYSE: RTN) weather programs are mission-critical components of the satellite's mission: the JPSS Common Ground System and the Visible Infrared Imaging Radiometer Suite sensor. Svalbard, Norway, is home to part of a global network of receiving stations that process and distribute polar satellite data to users worldwide. Photo taken at Kongsberg Satellite Services plateau, ...
Sat, 18 Nov 2017 08:00:00 +0100
A United Launch Alliance (ULA) Delta II rocket carrying the Joint Polar Satellite System-1 (JPSS-1) for NASA and National Oceanic Atmospheric Administration (NOAA) lifted off from Space Launch Complex-2 on Nov. 18 at 1:47 a.m. PST. The JPSS program provides the nation's next generation polar-orbiting operational environmental satellite system, delivering key observations for the nation's essential projects and services, including forecasting weather in advance and assessing environmental hazards...
Fri, 17 Nov 2017 00:00:00 +0100
Landing on Mars is difficult and not always successful. Well-designed advance testing helps. An ambitious NASA Mars rover mission set to launch in 2020 will rely on a special parachute to slow the spacecraft down as it enters the Martian atmosphere at over 12,000 mph (5.4 kilometers per second). Preparations for this mission have provided, for the first time, dramatic video of the parachute opening at supersonic speed. The Mars 2020 mission will seek signs of ancient Martian life by investiga...
Thu, 16 Nov 2017 15:07:00 +0100
The U.S. Navy's Communications Satellite Program Office, PMW 146, and Lockheed Martin (NYSE: LMT) handed over full operational control of the fifth Mobile User Objective System (MUOS) satellite to the Naval Satellite Operations Center (NAVSOC). The October 11 milestone followed the successful completion of the MUOS-5 satellite's on-orbit testing and delivery of all operational products needed to "fly" the satellite. In April, the Navy, working with Army Forces Strategic Command (ARSTRAT), con...
Thu, 16 Nov 2017 14:04:00 +0100
As part of ESA's strategy to foster commercial competitiveness in Europe while focusing on its core aims, the agency has transferred ownership of several ground tracking stations for reuse by external organisations. By the end of 2017, ESA will have transferred three stations to national organisations in Spain and Portugal, who will take over the provision of satellite tracking services to a wide variety of commercial customers. The three stations involved in the transfer are all equipped ...
Wed, 15 Nov 2017 19:33:00 +0100
Boeing [NYSE:BA] won large commitments across its twin- and single-aisle commercial airplane families, debuted key capabilities including the CST-100 Starliner docking and KC-46 refueling simulators, and announced services agreements at the 2017 Dubai Airshow. "This has been a very successful show for Boeing. Our regional customers have maintained their trust in our products and technology, and our partnerships in the Middle East region continue to grow," said Bernard Dunn, President, Boeing ...
Wed, 15 Nov 2017 12:00:00 +0100
A temperate Earth-sized planet has been discovered only 11 light-years from the Solar System by a team using ESO's unique planet-hunting HARPS instrument. The new world has the designation Ross 128 b and is now the second-closest temperate planet to be detected after Proxima b. It is also the closest planet to be discovered orbiting an inactive red dwarf star, which may increase the likelihood that this planet could potentially sustain life. Ross 128 b will be a prime target for ESO's Extremely ...
Wed, 15 Nov 2017 11:29:00 +0100
Thales Alenia Space, a joint venture between Thales (67%) and Leonardo (33%), has been chosen by the Italian space agency ASI to develop an instrument called RIME (Radar sounder for Icy Moons Exploration) for the JUICE (JUpiter Icy moons Explorer) mission, part of the European Space Agency's "2015-25 Cosmic Vision" program. Scheduled for launch in 2022 with an expected arrival in 2029, the JUICE mission is designed to study the Jovian system and more specifically its icy moons, Ganymede, Call...
Wed, 15 Nov 2017 00:00:00 +0100
The Ariane 5 for Arianespace's December 12 year-ending flight for 2017 has completed its initial build-up at the Spaceport in French Guiana - where preparations also are moving ahead with four satellite passengers that will further expand Europe's Galileo global navigation system once in their final orbit. During activity in the Spaceport's Launcher Integration Building, this heavy-lift vehicle for Arianespace Flight VA240 underwent the assembly process that began by mating its two solid prop...
Tue, 14 Nov 2017 19:47:00 +0100
The Defense Advanced Research Projects Agency (DARPA) has awarded BAE Systems a contract worth up to $12.8 million to develop an innovative space evaluation and analysis testbed to support the development, integration, evaluation and analysis of advanced space enterprise command and control (C2) tools and capability technologies. The U.S. military must be able to quickly establish situational awareness and execute operations in space. Within the space domain, many thousands of objects that ar...
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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:29-03-2017
     Last Modified:19-04-2017 (08:16)
    Job information
     Current job:GNC Engineer
     Employment Term:Permanent
     Job location:US only
     Date available:immediately
     Industry:Satellite Manufacturers and Subcontractors, Satellite Operators, Launch Systems, Space Tourism
     KeywordsADCS (GNC), and TT&C (RF Comm)
    CV

    Professional SUMMARY

    I’m working on a part time basis with the Johns Hopkins University – Applied Physics Lab as part of my masters in Space Systems Engineering. Specializing in the Spacecraft Guidance Navigation and Control with emphasizes on conducting the end to end design that will produce an agile spacecraft. Areas of attitude estimation, attitude control and spacecraft pointing stabilization, and orbital determination, working on simulating 6-DOF for a space mission I’m working on using Matlab/Simulink. In addition, I’m the TT&C (RF Comm) subsystem lead with emphasizes on the design and testing of spacecraft antenna and needed components for a functioning subsystem. Also, studying to a certain depth the rest of the subsystems needed by any spacecraft such as EPS, C&DH, Thermal, Propulsion, Mechanical, FSW, and different types of payloads. Knowing how to design each subsystem by matching and refining the mission requirements and developing design budget to balance cost, schedule, and performance conduct trade studies and risk analysis. After the finish of the end to end conceptual design of the space mission we are designing. We will also, integrate, and test the needed flight hardware. This degree is developing the overall knowledge of a space system giving me the perspective of a systems engineer as well giving me the in-depth knowledge in ADCS and TT&C.  In addition, to my JHU-APL work I have seven years of RF Engineering experience with in-depth knowledge in RF Fundamentals, radio propagation modeling and prediction, microwave path analysis, interference analysis, and antenna theory. I also have hands-on experience with RF hardware Integration, testing, and troubleshooting from radios, transmission line, connecters, amplifiers, antennas, and other essential components

    KEY COMPETENCIES

    Ÿ MatLab            Ÿ C++          Ÿ STK-AGI Certified              Ÿ ODTK             Ÿ Space Systems                 Ÿ ADCS (GNC)       Ÿ TT&C(RF)    Ÿ Astrodynamics and mission design                                  

    PROFESSIONAL EXPERIENCE

    Johns Hopkins University – Applied Physics Laboratory, Laurel, MD                 Aug 2016-Present Space Systems Engineer (TT&C and GN&C Subsystems Lead) Part Time Graduate Student attending remotely

    ADCS (GNC) Subsystem Lead:

    Calculating Center of pressure for every major area of the spacecraft, after getting center of mass, and spacecraft moment of Inertia from mechanical subsystem lead

    Calculating all possible forces acting on the spacecraft such as aero-force (for LEO), solar pressure, gravity gradient, and others. Then, calculating torque acting on the spacecraft and total torque in three dimensions (x,y, and z axis)

    Finding out needed torque to overcome outside forces acting on the spacecraft. And thus, sizing reaction wheels to achieve 3-axis stabilized spacecraft

    Finding out needed momentum sizing and then selecting appropriate method to dump momentum either using torque rods or thrusters

    The use of TRIAD algorithm to find attitude estimation matrix, angle of rotation, and axis of rotation. This is also used as part of 6-DOF analysis (if needed)The selection of two different sensors to give four different vectors

    Used Star tracker, Earth horizon sensors: 1st two vectors in body frame. 2nd two vector in inertial frame, those are used to complete 3-degrees of attitude (x,y,z). Also, used sun sensors for safe mode and solar panels pointing.

    Used velocity and distance tracking to be used as part of 3-degrees of position (x,y,z)

    Attitude estimation will be used as a feedback to perform attitude control using reaction wheels where there Is a wheel perpendicular to each axis (x,y,z)

    Also Attitude estimation will be used for position change as part of mission design to fire thrusters during phasing maneuver, and Hohmann transfer to lower orbit

    Summary of sensors:

    Star tracker: for attitude estimation

    Earth Horizon sensor: for attitude estimation (spacecraft must be nadir pointing)

    Sun sensors: for safe mode and solar panel pointing

     

    TT&C Subsystem lead:

    Perform Link Budget analysis for Space to Ground, Ground to Space, and Space to Space Link, proximity links

    Calculate needed cant angle for line of site communication for space to space links

    Develop TT&C block diagram

    Design needed components to perform as required such asSelection of transponder(s) for two-way accurate tracking:

    Velocity (Doppler shift) and Distance tracking

    Modulation (using BPSK, QPSK, or others) and Demodulation

    Forward Error Correction (FEC), such as Convolutional coding (Turbo Code or others)

    Selection of Amplifiers

    SSPA (Solid State Power Amplifier): built in transponder or separate depend on needed amplification that will be delivered to the antenna (<15W)

    TWTA (Traveling Wave Tube Amplifier): more than 15W usually separate from Transponder

    LNA (Low Noise Amplifier): used to amplify received signal given the received signal power is very low and hence very close to noise floor this amplifier is needed to amplify the signal power and minimize the amplification of noise usually NF<2dB

    Antennas: selection and design is based on many factors such as

    Spacecraft mass and power budget allocation to TT&C subsystem

    Spacecraft Link budget allocated to different links

    Received signal wavelength (Bands such as S, X, Ka, and Ku)

    Needed bandwidth of how many frequencies it could intercept

    Required EIRP to deliver minimum signal power to the other end

    Directivity

    Needed Beamwidth

    Needed gain

    Other components:

    Diplexer: acts as a filter if same antenna is used for TX/RX

    Hybrid Couplers: if equal power division is needed

    Switches: if there is a need to turn on/off different antenna or if there is a redundant system

    Transmission line: this is where impedance matching with the load (usually antenna) will need to be worked out to deliver as much power to the antenna throughout the transmission line as possible with the least reflected power. Thus, low VSWR.

     

    Johns Hopkins University – Applied Physics Laboratory, Laurel, MD                                                                Jan 2016-Present Space Systems Engineering Part Time Graduate Student attending part time via live video conference, 2016-Present

    The degree goal is to know how to design a space mission for both Earth orbits and deep space, we must be able to design the space mission by analyzing the mission goals and parameters and getting the mission different parameters and budgets such as Mass and Power budgets, as well conduct end to end design for all spacecraft subsystems.

    Working on designing a constellation of 6-10 spacecraft that can detect and report forest fire for NATO countries (The mission is comparable to the FireSatII)

    I’m acting as the Telemetry Tracking and Command (TT&C) subsystem lead, and Attitude Determination Control (ADCS) subsystem lead In addition, I’m responsible on Mission trade studies, Mission design summary, mission requirements, and Delta V budget

    Studying Spacecraft orbital mechanics and astrodynamics and using that knowledge in designing various missions using STK as well getting their parameters using mathematical equations and lastly the ability to calculate the required Delta V budget through the mission life time

    Knowing how to design the spacecraft subsystems and how they can get integrated and tested to operate fully in the environment of space

    In addition to the constellation design, there will also be another space mission will involve hardware design (CubeSat)

    study critical risk-based decision making required from system concept definition and degree auditing through design, procurement, manufacturing, integration and test, launch, and mission operations

    Study and apply mission assurance, ensure mission reliability, and system safety throughout the life cycle of the mission to achieve mission success

    Mission assurance such as risk management, system safety, reliability engineering, parts and materials, configuration management, requirements verification and validation, non-conformance, and anomaly tracking and trending.

     

    Mobilitie, Dallas, Texas       March 2017-Present

    Senior RF System Engineer, 2017-present

     

    Fusion Solutions Contractor, Dallas, Texas              Jan 2016-Nov 2016

    Sr. RF System Engineer Jan 2016- Dec 2016

    Strong Radio Frequency fundamentals, wave propagation, and Antenna theory. A senior DAS and small cells Design Engineer with responsibility on designing & configuring a Varity of custom configured wireless distributed networks with deep knowledge in overall DAS, small cells, antenna systems, and end to end wireless architecture. In addition, assuming full responsibility on the end to end system design. Outdoor small cells design to increase location capacity, and provide superior end customer experience.

    ERICSSON, Plano, Texas                           2010-2015

    RF System Engineer, 2010 – 2015

    RF Engineer Subject Matter Expert and solutions architect with in-depth knowledge of the fundamentals of Radio Frequency, wave propagation, antenna theory, transmission line theory, impedance matching, RF link budget analysis, . Worked on building, designing, integrating, testing, and optimizing end to end wireless networks with hands-on experience with Air Interface side and communication tower hardware such as Radios, cables, jumpers, amplifiers, and antennas. RF Technical Leader and a Subject Matter Expert (SME) with responsibility for, developing, building, and leading technical engineering teams in LTE, VOLTE, IMS Planning, Tuning, optimization, DAS, and small cells high profile projects. In addition, wrote technical documents, research & trial parameters & features

     

    EDUCATION / TRAINING

    Masters of Science, Space Systems Engineering

    Johns Hopkins University, Baltimore, MD - EST 2018 (Current GPA 4.0/4.0)-Administrated by the Applied Physics Laboratory

    Bachelors of Science, Electrical Engineering

    University of South Alabama, Mobile, AL - 2009

    Professional Affiliations: 1. AIAA (American Institute of Aeronautics & Astronautics) 2. IEEE (Institute of Electrical & Electronics Engineers)


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