11 to 20 of 332 Results
Dec 14, 2020
Poberezhskiya, Ilya; Luchika, Thomas; Zhao, Feng; Frerkinga, Margaret; Baileya, Vanessa; Basingera, Scott; Cady, Eric; Colavitaa, Mark; Creagera, Brandon; Fathpoura, Nanaz; Goulliouda, Renaud; Groff, Tyler; Morrissey, Patrick; Kempenaara, Joshua; Kerna, Brian; Krist, John; Moka, Fai; Mulierea, David; Nematic, Bijan; Riggsa, A.J.; Seoa, Byoung-Joon; Shia, Fang; Shreckengosta, Belinda; Steevesa, John; Tanga, Hong, 2020, "Roman Space Telescope Coronagraph Engineering Design and Operating Concept", https://hdl.handle.net/2014/53310, SPIE Astronomical Telescopes + Instrumentation 2020, San Diego, California, December 14-18, 2020, JPL Open Repository
NASA’s Nancy Grace Roman Space Telescope (formerly known as WFIRST) is a flagship astrophysics mission planned for launch in 2025. The coronagraph instrument (CGI) on Roman will demonstrate the technology for direct imaging and spectroscopy of exoplanets around nearby stars. It w... |
Dec 14, 2020
Kurtza, Stanley E.; Stander, Tinus; de Villiers, Dirk I. L.; Cerfonteyn, William; de Witt, Aletha; Ferrusca Rodrıquez, Daniel; Hiriart, David; Hughes, David H.; Jacobs, Christopher; Loinard, Laurent; van den Heever, Fanie; Velazquez de la Rosa Becerra, Miguel, 2020, "The Potential for a K-Band Receiver on the Large Millimeter Telescope", https://hdl.handle.net/2014/53303, SPIE Astronomical Telescopes + Instrumentation 2020, San Diego, California, December 14-18, 2020, JPL Open Repository
The 50-meter Large Millimeter Telescope (LMT) operating on the Sierra Negra in Mexico is the largest single- dish millimeter-wave telescope in the world. Although designed to work in the 3 mm and 1 mm bands, there is significant potential for LMT observations at centimeter wavele... |
Dec 14, 2020
McKeithen, Dylan; Shaklan, Stuart; Martin, Stefan; Lowe, Eric; Sheikh, David, 2020, "Broadband Characterization of Anti-reflection Coated Starshade Optical Edges for Solar Glint Control", https://hdl.handle.net/2014/53304, SPIE Astronomical Telescopes + Instrumentation 2020, San Diego, California, December 14-18, 2020, JPL Open Repository
A starshade is a large flower-shaped screen designed to enable the direct imaging of exoplanets with a space telescope. The starshade perimeter is composed of sharp, precisely shaped edges to minimize the glint of sunlight into the telescope. Past work has focused on bare edges t... |
Dec 7, 2020
McKinley, Ian M; Mok, Mason; Rodriguez, Jose, 2020, "Characterization Testing of Space-Flight Lockheed Martin Micro1-2 Cryocooler for the Mapping Imaging Spectrometer for Europa (MISE)", https://hdl.handle.net/2014/54771, VIRTUAL 21st International Cryocooler Conference (ICC21), Tallahassee, Florida, December 7-10, 2020, JPL Open Repository
The Mapping Imaging Spectrometer for Europa (MISE) instrument on the Europa Clipper mission uses a Lockheed Martin “high-power” Micro1-2 pulse tube cryocooler with a heat rejection temperature around 220 K to provide cooling at 80 K. This paper describes the thermal performance a... |
Dec 6, 2020
MacDonald, Michael; Kurowski, Marcin J.; Teixeira, Joao, 2020, "Direct Numerical Simulation of Fog Formation Within the Surface Layer", https://hdl.handle.net/2014/53234, 22nd Australasian Fluid Mechanics Conference (AFMC2020), Brisbane, Australia, December 6-10, 2020, JPL Open Repository
We investigate the effects of shear-driven turbulence on fog formation in the stably stratified surface layer, using recent direct numerical simulations (DNS) of dry and moist open-channel flows. A constant cooling rate applied at the ground mimics longwave radiative cooling, lea... |
Dec 5, 2020
Lakhmiri, Dounia; Alimo, Ryan; Le Digabel, Sébastien, 2020, "Tuning a variational autoencoder for data accountability problem in the Mars Science Laboratory ground data system", https://hdl.handle.net/2014/52317, NeurIPS - Conference on Neural Information Processing Systems, Vancouver, Canada, December 5-12, 2020, JPL Open Repository
The Mars Curiosity rover is frequently sending back engineering and science data that goes through a pipeline of systems before reaching its final destination at the mission operations center making it prone to volume loss and data corruption. A ground data system analysis (GDSA)... |
Nov 30, 2020
Bozovich, Amanda N.; Nguyen, Duc; Rax, Bernard G.; Davila, Joe; Zajac, Stephanie A., 2020, "Investigation of Application-Specific Bias Conditions and Dose Rate Dependency in Total Ionizing Dose (TID) Response", https://hdl.handle.net/2014/53315, IEEE Nuclear & Space Radiation Effects Conference, Santa Fe, New Mexico, November 30 - December 4, 2020, JPL Open Repository
This paper investigates flight circuit application bias and irradiation dose rate dependencies (“test as you fly” conditions) in the total ionizing dose (TID) response of various electronic components considered for use in a space radiation environment. |
Nov 30, 2020
Silverman, Milo C; Lin, Justin, 2020, "Mars 2020 Rover Adaptive Caching Assembly: Caching Martian Samples for Potential Earth Return", https://hdl.handle.net/2014/53268, 45th Aerospace Mechanisms Symposium, Houston, Texas, November 30 - December 4, 2020, JPL Open Repository
The Adaptive Caching Assembly (ACA) is part of the Sampling and Caching System on the Mars 2020 Perseverance Rover, and consists of multiple stations that process, hermetically seal, and store sample tubes containing collected Martian material, either rock cores or regolith sampl... |
Nov 30, 2020
Havelund, Klaus; Kurklu, Elif, 2020, "A Flight Rule Checker for the LADEE Lunar Spacecraft", https://hdl.handle.net/2014/53316, ICTAC 2020: 17th International Colloquium on Theoretical Aspects of Computing, Macau, China, November 30 - December 4, 2020, JPL Open Repository
As part of the design of a space mission, an important part is the design of so-called flight rules. Flight rules express constraints on various parts and processes of the mission, that if followed, will reduce the risk of failure. One such set of flight rules constrain the forma... |
Nov 29, 2020
Thorbourn, Dennis O; Scheick, L. Z.; Woo, A. R.; Kim, W.; Dawson, S. F.; Low, N. M.; Boca, A.; Chinn, J. Z.; Martin, E.; Foster, J. T.; Davies, R. D.; Soares, C. E.; Fugett, D.A.; Wong, A. T., 2020, "In Situ Testing Methods for Mixed-Mode Harsh Environments", https://hdl.handle.net/2014/53287, VIRTUAL IEEE Nuclear & Space Radiation Effects Conference, Santa Fe, New Mexico, November 29 - December 8, 2020, JPL Open Repository
A review of the radiation effects investigation capabilities of the JPL Dynamitron Accelerator Facility are discussed. A process for its use in performing total ionizing dose (TID) studies are outlined. The results of radiation effects in complicated test systems where device eff... |
