Latest Space News
Thu, 23 Nov 2017 00:00:00 +0100
The 11th annual Mobile Deployable Communications conference will take place in Warsaw, Poland on 1st and 2nd February 2018. Download Conference Agenda | Register to attend this Conference Flexible and continuous connectivity, anywhere, at any time remains a key priority for major defence forces around the world. With the critical threat of cyber warfare intensifying, there is now a pressing need to ensure secure communications can be effectively operated in contested environments. The...
Wed, 22 Nov 2017 19:00:00 +0100
Neutrinos are abundant subatomic particles that are famous for passing through anything and everything, only very rarely interacting with matter. About 100 trillion neutrinos pass through your body every second. Now, scientists have demonstrated that the Earth stops energetic neutrinos-they do not go through everything. These high-energy neutrino interactions were seen by the IceCube detector, an array of 5,160 basketball-sized optical sensors deeply encased within a cubic kilometer of very c...
Wed, 22 Nov 2017 15:09:00 +0100
ESA's first Earth observation satellite was launched on 23 November 1977. When the first Meteosat satellite took its place in the sky, it completed coverage of the whole globe from geostationary orbit and laid the foundations for European and world cooperation in meteorology that continues today. Weather - and particularly extreme weather - affects everything we do. Being able to see the whole disc of Earth allows forecasters to see developing weather systems, as well as working out wind spee...
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 ...
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  • CV: Thermal engineer

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    Personal information
     Name:<withheld>
     Age:<withheld>
     Country:<withheld>
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    Contact information
     Email:<withheld>
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    Candidate Profile
     Date Submitted:15-04-2014
     Last Modified:16-04-2014 (08:36)
    Job information
     Current job:Thermal engineer
     Employment Term:Temp/Contract
     Job location:US only
     Date available:immediately
     Industry:Satellite Manufacturers and Subcontractors
     KeywordsSatellite Thermal Control, Heat Transfer, Numerical Analysis
    CV


     Residency Status: US Citizen

     

    Accomplishments:

    1.   Worked on thermal design and analysis of geosynchronous satellites of Indian Space Program at ISRO for 15 years as senior thermal scientist.

    2.   Thermal system design of high power density components of geo-synchronous satellites.

    3.   Strong programming experience in FORTRAN and C on UNIX based workstation such as IBM RS6000. Worked on various CAD packages such as AutoCAD, SDRC-IDEAS.

    4.   Thermal analysis of some of the critical components of the spacecraft for both transfer and in-orbit conditions.

    5.   Thermal control design using MLI, OSR, Al-blocks and heat pipes.

    6.   Thermal control issues like optical property degradation of materials such as OSR, MLI, low emittance tape, black and white paints have been studied.

    7.   Experience in thermal vacuum testing of satellites: Package thermal qualification level testing (hot and cold soak testing and thermal cycling) and on-orbit testing.

    8.   Transfer orbit as well as on-orbit temperature control of geo-synchronous satellite.

    9.   Post launch thermal analysis: thermal model correction.

    10. As a part of my Ph.D. thesis, extensive research has been conducted to develop techniques and algorithms to optimize the design of thermal control system of the spacecraft. This technique is found to be highly useful in improving the thermal performance of the geo-synchronous satellites. Results of these studies are published in several reputed international journals.

    11. Authored 5 technical reports (Department of Space, Government of India).

    12. Authored 4 papers. These are published in the Journal of Spacecraft and Rockets under the publication of American Institute of Aeronautics and Astronautics (AIAA), U.S.A. and Journal of Aerospace Engineering, U.K.

    13. Acted as a referee for the Journal of Aerospace Engineering, U.K.
     

     

    Specialization: Optimization of thermal systems design of spacecraft components using sensitivity analysis.  Expert in analysis and design of thermal control system for the electronic components of spacecraft systemsuch as, TWTA, Battery, Shunt regulator, Solar panel etc.  Expert in developing Mathematical models for any thermal control system. Expert in the topics such as Calculus, Differential equations, Numerical analysis, Linear algebra.

     

    Publications:

    1. Suresha, S., Gupta S.C., and Katti, R.A, "Thermal Sensitivity Analysis of Spacecraft Battery", Journal of Spacecraft and Rockets,AIAA, Vol. 34, No.3, May-June 1997, pp.384-390.

    2. Suresha, S., Gupta S.C., "Calculation of Sensitivities in Thermal Control Systems with Nonlinear inequality Constraints", Journal of Spacecraft and Rockets, AIAA, Vol.35, No. 4, July-August 1998, pp.552-558.

    3. "Effect of discontinuous heat loads during solar eclipse on transient thermal sensitivity analysis", AIAA, Vol. 36, No.6, November-December 1999, pp. 916- 918.

    4. "Thermal Sensitivity Analysis of a 22N Bipropellant Thruster in Spacecraft", Proc Inst Mech Engs, Vol 213 part G, pp.321-335.
     

     

    Professional Experience: 

     

    BAE Systems (TAC Contractor), Santa Clara, CA                        

    Worked as a Vehicle software Engineer. Job involved the electrical system integration and testing of combat vehicles.

    Functionality testing of RTD Sensors:

    RTD sensors were used to activate AFES system in the vehicle. Tested the sensors both in automatic and manual mode. In automatic mode, sensor needs to give feed back to the control unit called RIU depending upon its temperature co-efficient resistance. Subsequently RIU system has to drive the AFES.

    Firmware uploading on RIU and other LRUs:

    Uploaded the firmwares on different LRUs (Line replacement units) using respective hardware application tools through Ethernet/RS232 communication  ports. Participated in different system functionality testing relating to low and high voltage systems. Good knowledge of propulsion system of the vehicle. In-depth knowledge on network communication testing tools such as CANoe. Debugging Ethernet and CAN communication issues. Good knowledge on Hybrid Electric Drive.

     

    Uploading and downloading of firmwares on the system using RS32 and Gigabit etthernet communication. Management of system configuration files developed in C++.

     

    Santa Clara University, Santa Clara, CA                (2003-2008)   

                                

    Specializing in logic design and Digital Signal Processing.  Design and Analysis of combinational as well as sequential logic circuits have been studied in depth.  Initially, simple combinational logic circuits have been implemented using Xilinx Spartan FPGA. Subsequently, ALU (Adder/Subtractor) and Comparator designs were realized also with FPGA. 

     Hardware Description Language such as Verilog has been used to capture the schematic. Studied ASIC design philosophy and hardware verification procedures. Also the Digital Signal Processing techniques have been studying with a more emphasize on filtering design. Some of the analog circuits have been analyzed for their frequency response using SPICE tool.

     

    Protnov Computer School,Mountain View, CA            (2001 – 2002)

    Worked on Software QA tests and test automation projects using SILK.

     

    Indian Space Research Organization, India             (1985-2000)

    Worked in ISRO as a Project Manager for GSAT (geo-synchronous satellites) project. During the 15 years of career in ISRO, I worked on many different spacecraft projects as a Scientist, technical consultant and Project Manager.

    Following electronic components have been designed for their temperatures for both transfer as well as in-orbit conditions:
    Shunt regulator, SSPA, TWTA, Antenna, Solar Panel and house keeping packages of INSAT-2E and GSAT-2 satellite of Indian space program.

    Each and every component of the spacecraft has to be maintained under certain temperature regimes during all the phases of the spacecraft such as transfer orbit and in-orbit conditions. To ensure this thermal control system design is envisaged.
    Design of thermal control system for the spacecraft requires the development of mathematical model. Heat transfer in spacecraft systems is dominated by conduction and radiation modes of heat transfer. Mathematical model is developed using lumped parameter approach in conjunction with finite difference technique. Both coarse and detailed mathematical models have been developed depending on the problem such as panel level or package level analysis. Both steady state as well as transient models has been developed. Mathematical model for steady state results in system of algebraic equations and system of differential equations for transient problems. Both these types of equations are solved using numerical approach. Temperatures prediction has been done for transfer orbit as well as on-orbit conditions. Subsequently, temperatures are analyzed to design optimal radiator areas on the satellite equipment panel.

    Design of Thermal Control System for High Power Density Packages
    a) Development of Thermal Mathematical model
    b) Calculation of Steady state and Transient Temperatures :
    Design of thermal control system for high power density packages of the spacecraft such as Traveling Wave Tube Amplifiers (TWTA) and Solid State Power Amplifiers(SSPA) is an uphill task as all these components are to be maintained within a narrow temperature range and subjected to large amount of internal heat dissipation and external heat load boundary. In such situation, thermal management of these components has become an important task. In general thermal system design is envisaged with the help of thermal control systems such as heat pipes, Al- embedded blocks as heat sinks, OSR, MLI, selective tapes etc. In this particular situation, heat pipes, MLI and OSR are used to control the temperature of TWTAs and SSPAs. Heat pipe network has been embedded inside the equipment panel on which power density components are mounted. Surface of the equipment panel facing space is covered with MLI and OSR. Appropriate MLI and OSR sizing have been done to provide optimal radiator area. Surface facing the spacecraft is painted black to have more radiation coupling with spacecraft. Design of these thermal control elements is based on the thermal analysis under consideration. Thermal analysis of packages like these requires a usage of CAD tool such as I-DEAS. I-DEAS is generally available on UNIX workstations such as SGI, IBM and SUN. Simulation component of I-DEAS has been extensively used in this context.

    Master modeler has been used to simulate SSPAs and TWTAs. These components are of different shapes and sizes. Initially sub-parts were created using primitive parts such as sphere, cube, cylinder etc. Heat pipe modeling was also done appropriately. Subsequently all these parts were modified, dimensioned and assembled together to form an object. Once all the objects are created they are stored in library.

    Meshing module has been used to carry out solid mesh or surface mesh on the objects created. Both manual and mapped mesh has been used. Meshing results in the creation of different finite elements. These elements are grouped under different names. Finally all these objects are placed on the spacecraft panel which is also modeled and meshed in a similar fashion.
    Thermal analysis module is used to simulate conduction couplings, radiation couplings, and orbital heating for thermal control elements such as heat pipes, MLI, heat sinks and OSR.
     

    Finally Temperature prediction has been done using I-DEAS TMG. Both steady-state as well as transient temperatures were calculated from the above simulation model for both transfer as well as in-orbit conditions. Subsequently, the temperatures of all the components are analyzed to design optimal radiator areas for the components.

    Development of Interface Program between I-DEAS and Harvard Graphics
    Interface has been developed between I-DEAS and Harvard Graphics using 'C'. This program converts the temperature of I-DEAS stored in .unv file and TEMPF file to a format suitable for X-Y Plot using Harvard Graphics. This program is used for the generation of customized time v/s temperature data.

    Thermal Vacuum Testing for Satellites
    Important packages of the satellites were tested for hot and cold soak and thermal cycling conditions. Also, the thermal performance test has been done to verify the thermal mathematical model. Thermal mathematical model correction has been done based on the analysis of thermal performance test.

    Post-Launch Thermal Analysis of Satellites
    On-orbit temperatures of the packages are compared with the predicted temperatures and subsequently, the thermal mathematical model correction has been done with the help of thermal sensitivity studies.
     

     

    Education:

    Santa Clara University, Santa Clara, CA

    MS in Electrical Engineering                                                                (March. 2008)

    Graduate Certificate Program in Fundamental of  Electrical  Engg.        (Dec.  2004)              

     

    Indian Institute of Science

    Ph.D  in Applied Mathematics                                                                      (Sept.  1999)

     

    Annamalai University                                                                                    (Sept. 1991)

    MS in Physics (Electronics)


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