21 to 30 of 6,761 Results
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... |
Mar 2, 2024
Eric Rice, 2024, "Designing the Ka-Band System Architecture for Science Data Return on the SPHEREx Mission", https://doi.org/10.48577/jpl.BW19VP, IEEE Aerospace Conference Big Sky, Montana, JPL Open Repository
The Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer (SPHEREx) mission, a part of the NASA Astrophysics Medium Explorer (MIDEX) program, will produce the first all-sky near infrared spectral survey of the universe, collecting images ever... |
Mar 2, 2024
William Jun, 2024, "Ground-Assisted Position Navigation and Timing (PNT) for Moon and Mars", https://doi.org/10.48577/jpl.O77R17, IEEE Aerospace Conference Big Sky, Montana, JPL Open Repository
The recent exploration initiatives for robotic and human missions to the Moon and Mars requires long-term communications and navigation infrastructures that provide accurate and autonomous PNT services for orbiting and surface users. NASA launched the Communication Relay and Navi... |
Mar 2, 2024
Lin Yi, 2024, "All Solid-State Transmitter (ASTRAM) for Next-Generation Ground-Based Planetary Radar", https://doi.org/10.48577/jpl.NZDBJV, IEEE Aerospace Conference Big Sky, Montana, JPL Open Repository
This paper presents the development of a newtype of transmitter for next-generation ground-basedplanetary radar. The transmitter is based on mature,reliable solid-state technology, and provides analternative to traditional amplifier tube-basedtransmitter systems. The technology d... |
