1 to 10 of 65 Results
Oct 31, 2021
Bescup, John C, 2021, "Large-Scale CT Inspection of Feed-Through EMI Filters for Space Application", https://hdl.handle.net/2014/55914, International Symposium for Testing and Failure Analysis (ISTFA) 2021, Phoenix, Arizona, October 31 - November 6, 2021, JPL Open Repository
A type of Feed-Through Electromagnetic Interference (EMI) Filter incorporating two discoidal (ring-shaped) capacitors was selected for use in the Europa Clipper spacecraft propulsion systems. Parts reliability specialists were aware of historical problems with the attach material... |
Sep 27, 2021
Rossi, Federico; Branch, Andrew; Schodlok, Michael P.; Stanton, Timothy; Fenty, Ian G.; Vander Hook, Joshua; Clark, Evan B., 2021, "Stochastic Guidance of Buoyancy Controlled Vehicles under Ice Shelves using Ocean Currents", https://hdl.handle.net/2014/55064, 2021 International Conference on Intelligent Robots and Systems (IROS), Prague, Czech Republic, September 27 - October 1, 2021, JPL Open Repository
We propose a novel technique for guidance ofbuoyancy-controlled vehicles in uncertain under-ice ocean flows.In-situ melt rate measurements collected at the grounding zoneof Antarctic ice shelves, where the ice shelf meets the underlyingbedrock, are essential to constrain models o... |
Sep 20, 2021
Schoelen, Dane; Clar, Evan B.; Mechentel, Flora; Gebara, Christine, 2021, "System Analysis and Generative Design for Icenode, a Buoyant Vehicle for Measuring Melt Rate Under Ice Shelves", https://hdl.handle.net/2014/55204, OCEANS 2021, San Diego, California, September 20-23, 2021, JPL Open Repository
Antarctic ice shelves buttress the Antarctic Ice Sheet from sliding into the ocean, and their collapse could trigger a meter or more of global sea level rise by the end of the century. Current state-of-the-art predictions for ice shelf behavior in a warming climate have large unc... |
Sep 20, 2021
Sparks, Lawrence; Altshuler, Eric, 2021, "The spatial distribution of ionospheric threats to WAAS integrity, 2000 – 2019: a systematic analysis", https://hdl.handle.net/2014/55944, ION GNSS+ 2021, St Louis, Missouri, September 20-24, 2021, JPL Open Repository
The United States’ Wide Area Augmentation System (WAAS) broadcasts data to facilitate aircraft navigation. This paper examines the spatial dependence of ionospheric disturbances that have threatened the accuracy and reliability of position estimates derived from these data over t... |
Sep 20, 2021
Gomez, Annabel; Pi, Xiaoqing, 2021, "Applying Machine Learning to Predict Alaskan Ionospheric Irregularities", https://hdl.handle.net/2014/55927, ION GNSS+ 2021, St Louis, Missouri, September 20-24, 2021, JPL Open Repository
In this work several machine-learning (ML) techniques for predicting ionospheric irregularities in the northern auroral zone were tested. The techniques include Ridge Regression, Long Short-Term Memory Neural Network (LSTM), Classification Neural Network (CNN), Autoencoder Classi... |
Sep 13, 2021
Gunapala, Sarath; Ting, David; Rafol, Sir; Soibel, Alexander; Khoshaklagh, Arezou; Keo, Sam; Pepper, Brian; Fisher, Anita; Hill, Cory; Wenger, Tobias; Pagano, Thomas, 2021, "Digital Mid-Wavelength and Long-Wavelength Infrared Focal Planes for SmallSat Applications", https://hdl.handle.net/2014/55921, SPIE Remote Sensing 2021 (Virtual / In-Person Hybrid), Madrid, Spain, September 13-16, 2021, JPL Open Repository
In this presentation, we will report our recent efforts in achieving high performance in Antimonides type-II superlattice (T2SL) based infrared photodetectors using the barrier infrared detector (BIRD) architecture. The high operating temperature (HOT) BIRD focal plane arrays (FP... |
Sep 12, 2021
Mohamed, Mohamed Sabry; Forouhar, Siamak, 2021, "β-BBO-on-Insulator Waveguide Design for Deep-Ultraviolet Generation", https://hdl.handle.net/2014/55251, ECOC 2021, Bordeaux, France, September 12-16, 2021, JPL Open Repository
We present a rib waveguide design in β-barium borate-on-insulator platform for coherent deep-ultraviolet generation down to a wavelength of 230 nm via nonlinear frequency conversion. |
Aug 28, 2021
Virkler, Kristen M; Soriano, Melissa; Pineda, Jorge L.; Kocz, Jonathon; Horiuchi, Shinji; McNichols, Tyrone; Bradford, Brian, 2021, "DSN Radio Astronomy Spectrometer", https://hdl.handle.net/2014/54277, International Union of Radio Science General Assembly & Science Symposium (URSI GASS) 2021, Rome, Italy, August 28 - September 4, 2021, JPL Open Repository
The Deep Space Network (DSN) enables NASA to communicate with its deep space spacecraft. By virtue of its large antennas, the DSN can be used as a powerful instrument for radio astronomy. In particular, Deep Space Station (DSS) 43, the 70 m antenna at the Canberra Deep Space Comm... |
Aug 16, 2021
Gunapala, Sarath; Bidney, Grant W.; Jin, Boya; Deguzman, Lou; Duran, Joshua M.; Ariyawansa, Gamini; Anisimov, Igor; Limberopoulos, Nicholaos I.; Urbas, Augustine M.; Allen, Kenneth W.; Astratov, Vasily N., 2021, "Ni-Silicide Schottky Barrier Micropyramidal Photodetector Array", https://hdl.handle.net/2014/55103, IEEE National Aerospace & Electronics Conference, Dayton, Ohio, August 16-19, 2021, JPL Open Repository
In attempt to increase the quantum yield of metal/silicide Schottky barrier photodetectors, in this work we fabricated and tested Si micropyramidal arrays which are capable to resonantly trap photons in the photodetector areas. To simplify testing, Ni/silicide Schottky barrier ph... |
Aug 9, 2021
Blanchard, Jared T.; Lo, Martin W.; Landau, Damon; Anderson, Brian D.; Close, Sigrid, 2021, "New Tools for Tour Design: Swiss Cheese Plot, Invariant Funnel, and Resonant Encounter Map", https://hdl.handle.net/2014/55236, 2021 AAS/AIAA Astrodynamics Specialist Conference, Big Sky, Montana, August 9-12, 2021, JPL Open Repository
We define a new set of tools for tour design introduced in previous work: the”Swiss Cheese Plot,” ”Invariant Funnel,” and ”Resonant Encounter Map.” These tools promise to be useful in designing, analyzing, and navigating low-energy trajectories through multi-body systems. We revi... |
