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  • Tabataba-Vakili, Fachreddin; Rogers, J.H.; Eichstädt, G.; Orton, G.S.; Hansen, C.J.; Sinclair, J.A.; Giles, R.S.; Ravine, M.A.; Bolton, S.J. (Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2019, 2019-07-28)
  • Paciesas, W. S.; Pendleton, G. N.; Harmon, B. A.; Wilson, C. A.; Rubin, B. C.; Ling, J. C.; Skelton, R. T.; Wheaton, W. A. (1994--Augu)
  • Jun, I.; Mitrofanov, I.; Litvak, M. L.; Sanin, A. B.; Boynton, W. V.; Fedosov, F.; Gabriel, T.; Golovin, D.; Hardgrove, C.; Harshman, K.; Kozyrev, A. S.; Kuzmin, R. O.; Malakhov, A.; Moersch, J.; Mokrousov, M.; Nikiforov, S.; Tate, C. (Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2017, 2017-05-15)
    The Dynamic Albedo of Neutrons (DAN) instrument onboard Mars Science Laboratory (MSL) consists of a pulsed neutron generator (PNG) and the neutron detector/electronics (DE) module. There are two 3He-proportional counters ...
  • Ruzmaikin, Alexander; Feynman, Joan; Robinson, Paul (1993-07)
    We examine the question of whether or not the non-periodic Variations in solar activity are caused by a white-noise random process. The Hurst exponent, which characterizes the persistence of a time series, is evaluated ...
  • Spence, Penelope (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2009, 2009-11)
    This is a continuation of the report “Effects of Hand Soldering MIL-PRF-55365 Tantalum Capacitors,” which discusses the parametric effects of convection reflow soldering, JPL standard hand soldering, and optimized hand ...
  • Pap, J. M. (1996-09-30)
    Measurements of the solar energy throughout the solar spectrum and understanding its variability provide important information about the physical processes and structural changes in the solar interior and in the solar ...
  • Klein, M. J.; Hofstadter, M. D.; Hammel, H. B.; Leflang, J. G.; Roller, J. P.; McLeod, R. K. (2002-10-06)
  • Pap, Judit M.; Willson, Richard C.; Frohlich, Claus; Donnelly, Richard F.; Puga, Larry (1993-06-20)
    For more than a decade total solar irradiance has been monitored simultaneously from space by different satellites. The detection of total solar irradiance variations by satellite -based experiments during the past decade ...
  • Johnson, William R.; Hook, Simon J.; Mouroulis, Pantazis Z.; Wilson, Daniel W.; Gunapala, Sarath D.; Hill, Cory J.; Mumolo, Jason M.; Eng, Bjorn T. (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2008, 2008-08-10)
    Preliminary results are presented for an ultra compact long-wave infrared slit spectrometer based on the dyson concentric design. The dyson spectrometer has been integrated in a dewar environment with a quantum well infrared ...
  • Gunapala, S.; Bandara, S.; Liu, J.; Luong, E.; McKelvey, M.; Mumolo, J.; Rafol, S.; Shott, C.; Stetson, N. (1999-05-03)
    In this paper, we discuss the development of this very sensitive long-wavelength infrared (LWIR) camera based on a GaAs/AlGaAs QWIP focal plane array (FPA) and its performance in terms of quantum efficiency, NET, MRDT, ...
  • Gunapala, S.; Bandara, S.; Liu, J.; Luong, E.; McKelvey, M.; Mumolo, J.; Shott, C.; Stetson, N.; Rafol, S. (1998-11-03)
    In this paper, we discuss the development of this very sensitive long-wavelength infrared (LWIR) camera based on a GaAs/AlGaAs QWIP focal plane array (FPA) and its performance in terms of quantum efficiency, NEAT, uniformity, ...
  • Gunapala, S. D.; Liu, J. K.; Sundaram, M.; Bandara, S. V.; Shott, C. A.; Hoelter, T.; Maker, P. D.; Muller, R. E. (1996-04-08)
    In this paper, we discuss the development of very sensitive long wavelength infrared (LWIR) GaAs/AlxGa1-xAs quantum well infrared photodetectors (QWIPs), fabrication of random reflectors for efficient light coupling, and ...
  • Gunapala, S. D.; Bandara, S. V.; Liu, J. K.; Hong, W.; Sundaram, M.; Maker, P. D.; Muller, R. E.; Shott, C. A.; Carralejo, R. (1998-03)
    The performcance of this QWIP camera is reported including indoor and outdoor imaging.
  • Gunapala, S. D.; Bandara, S. V.; Liu, J. K.; Hong, W.; Sundaram, M.; Carralejo, R.; Shott, C. A.; Maker, P. D.; Miller, R. E. (1997-04-21)
    A hand-held quantum well infrared photodetector camera has been demonstrated.
  • Gunapala, Sarath D.; Bandara, S. V.; Liu, J. K.; Hill, C. J.; Rafol, S. B.; Mumolo, J. M.; Blazejewski, E. R.; Shott, C. A. (Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006., 2006-04-17)
    We have exploited the artificial atomlike properties of epitaxially self-assembled quantum dots for the development of high operating temperature long wavelength infrared (LWlR) focal plane arrays. Quantum dots are ...
  • Gunapala, Sarath; Rafol, Sir; Ting, David; Soibel, Alexander; Khoshakhlagh, Arezou; Keo, Sam; Pepper, Brian; Fisher, Anita; Luong, Edward; Hill, Cory; D'Souza, Arvind; Masterjohn, Christopher; Babu, Sachidananda; Ghuman, Parminder (Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2019, 2019-07-28)
    We will report our recent efforts in achieving high performance in Antimonides type-II strained-layer superlattice based infrared photodectors using the barrier infrared detectors.
  • Lin, T.; Park, J.; George, T.; Jones, E. W.; Fathauer, R. W.; Maserjian, J. (1993-02-02)
    By incorporating a 1-nm-thick p+ doping spike at the PtSi/Si interface, we have successfullydemonstrated extended cutoff wavelengths of PtSi Schottky infrared detectors in the long wavelengthinfrared (LWIR) regime for the ...
  • Campbell, Bruce A.; Hawke, B. Ray; Thompson, Thomas W. (1995)
    Radar measurements at 70 cm and 7.5 m wavelengths provide insight into the structure and chemical properties of the upper 5-100 m of the lunar regolith and crust. Past work has identified a number of anomalous regions and ...
  • Park, J. S.; Lin, T. L.; Jones, E. W.; Castillo, H. M. Del; George, T.; Gunapala, S. D. (1993-07)
    Utilizing the low temperature silicon molecular beam epitaxy (MBE) growth of degenerately doped SiGe layers on Si, long wavelength stacked SiGe/Si heterojunction internal photoemission (HIP) infrared detectors with multiple ...