21 to 30 of 6,770 Results
Mar 25, 2024
Yoseph Bar-Cohen, 2024, "Acoustics and RF communication thru deep ice for application to ocean worlds exploration", https://doi.org/10.48577/jpl.MXSIR5, SPIE Smart Structures and Nondestructive Evaluation 2024, JPL Open Repository
One of NASA’s priorities is the in-situ exploration of ocean worlds in the solar system where there may potentially exist life under the ice shell. This requires reaching the ocean below through great depths of ice at extremely low temperatures. Jupiter’s moon Europa is such a ch... |
Mar 25, 2024
Yoseph Bar-Cohen, 2024, "Piezoelectric motor for cryogenic applications", https://doi.org/10.48577/jpl.D4KMUF, SPIE Smart Structures and Nondestructive Evaluation 2024, JPL Open Repository
Expanding the capabilities that are used in the NASA’s exploration of planetary bodies in our solar system would require mechanisms and actuators that can operate at cryogenic temperatures (-240 °C to -60 °C) in dusty environments. These applications include the exploration of lu... |
Mar 25, 2024
Hyeong Jae Lee, 2024, "Development of Elastic Wave Analyzer for Icy Sub-surfaces (EWAIS) in water-bearing worlds", https://doi.org/10.48577/jpl.DQQM2Q, SPIE Smart Structures and Nondestructive Evaluation 2024, JPL Open Repository
Active acoustic probing is important for supporting the investigation of icy subsurfaces and under-surface liquid water in potentially water-bearing habitable worlds. Many planetary orbital spacecraft and lander mission concepts have already been equipped with or are in the proce... |
Mar 25, 2024
John Liu, 2024, "Auxiliary Gyroscope Approach for Balanced Performance via Gyro Self-Calibration", https://doi.org/10.48577/jpl.NGGPM2, The 11th IEEE International Symposium on Inertial Sensors & Systems, JPL Open Repository
Gyro noise and bias are often performance limitingfactors in space and terrestrial navigation systems, especiallyin cases where no aiding sensors are available. A gyro unitwith good performance in both noise and bias may be veryexpensive and with undesirable SWaP. In this paper,... |
Mar 25, 2024
Stewart Sherrit, 2024, "Characterization of surface parallel mirror actuation using preloaded commercial lead zirconate titanate (PZT) stacks", https://doi.org/10.48577/jpl.TWUFCE, SPIE Smart Structures and Nondestructive Evaluation 2024, JPL Open Repository
The next generation of space telescopes will require large, segmented apertures for observations in the near ultraviolet through mid- and far-infrared regions to enable new science ranging from exoplanet characterization to precision astronomical observations that refine astrophy... |
Mar 25, 2024
Stewart Sherrit, 2024, "A network model for piezoelectric flexure actuators", https://doi.org/10.48577/jpl.GWO9YG, SPIE Smart Structures and Nondestructive Evaluation 2024, JPL Open Repository
We investigate flexure piezoelectric stacks to produce large force and fine position control. The network model for the free ideal stack with many layers was first worked out by Martin [Martin 1963, 1964a, 1964b]. He noted that the stack impedance model in the limit of large laye... |
Mar 24, 2024
Andrey Matsko, 2024, "Environmentally Stable Ultra-Low Noise Self-Injection Locked Semiconductor Lasers", https://doi.org/10.48577/jpl.LFC2QV, Optical Fiber Communication Conference 2024, JPL Open Repository
Self-injection locking (SIL) of semiconductor lasers by means of monolithic optical cavities allow generation of high spectral purity and high stability optical signals under varying environmental conditions. We review recent advances in the field and focus at the SIL by means of... |
Mar 17, 2024
Kristy Hecht, 2024, "Dual-Frequency Metasurface Antenna for Remote Sensing", https://doi.org/10.48577/jpl.AMT91X, 18th European Conference on Antennas and Propagation, JPL Open Repository
This paper presents an innovative approach to designing dual-frequency Metasurface (MTS) antennas. These antennas cater to the growing demand for multifrequency ca- pabilities in applications like Earth science, satellite communi- cations, and remote sensing. Traditional multifre... |
Mar 17, 2024
Gaurangi Gupta, 2024, "Feed Assembly Development for INCUS", https://doi.org/10.48577/jpl.P3JCWY, 18th European Conference on Antennas and Propagation, JPL Open Repository
INCUS (INvestigation of Convective UpdraftS) is an Earth Science project approved by NASA in 2022. The goal of the mission is to study in detail how water vapor and droplets move inside tropical storms and thunderstorms and understand their effects on weather and climate models.... |
Mar 3, 2024
Mina Rais-Zadeh, 2024, "Advances in Microvalve and Micro Pre-concentrator Technology for the Space Atmosphere Monitor Instrument: From Research to the International Space Station", https://doi.org/10.48577/jpl.NOKA3U, IEEE EDTM, JPL Open Repository
This paper delves into the iterative evolution of microelectromechanical system (MEMS) Microvalve (MV) and pre-concentrator (PC) generations designed for the Spacecraft Atmosphere Monitor (S.A.M.) instrument, a critical component of the International Space Station’s (ISS) air qua... |
