A5014833223- Space Satellite Systems and Control
- Spacecraft Design and Technology
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Particle Detector Development and Performance
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
- Adaptive optics and wavefront sensing
- Satellite Image Processing and Photogrammetry
- Atmospheric Ozone and Climate
- Dark Matter and Cosmic Phenomena
- Astro and Planetary Science
- Satellite Communication Systems
- Ionosphere and magnetosphere dynamics
- CCD and CMOS Imaging Sensors
- Solar and Space Plasma Dynamics
- Scientific Research and Discoveries
- Spacecraft and Cryogenic Technologies
- Advanced Chemical Sensor Technologies
- Nuclear Physics and Applications
- Robotics and Sensor-Based Localization
- Astrophysical Phenomena and Observations
- Particle Accelerators and Free-Electron Lasers
- Aerospace Engineering and Energy Systems
- Space Exploration and Technology
Lawrence Livermore National Laboratory
2011-2024
Stanford Synchrotron Radiation Lightsource
2007-2009
University of California, Santa Barbara
2009
The Pandora SmallSat is a NASA flight project aimed at studying the atmospheres of exoplanets -- planets orbiting stars outside our Solar System. will provide first dataset simultaneous, multiband (visible and NIR), long-baseline observations their host stars. an ambitious that fly 0.44 m telescope in small form factor. To achieve scientific goals, mission requires departure from traditional cost-schedule paradigm half-meter-class observatories. achieves this by leveraging existing...
Abstract Pulse shape discrimination (PSD) is the task of classifying electronic pulse shapes for different particle types such as gamma rays and fast neutrons interacting in scintillators read out by photo sensitive detectors. This field has been limited its adoption techniques found statistical learning community. Methods initially employed 1960s analog circuitry persist current PSD literature describing operations performed on digitized pulses, which are amenable to rigor. Despite vast...
The Space-based Telescopes for Actionable Refinement of Ephemeris (STARE) program will collect the information needed to help satellite operators avoid collisions in space by using a network nanosatellites determine more accurate trajectories selected objects orbiting Earth. In first phase STARE program, two pathfinder cube-satellites (CubeSats) equipped with an optical imaging payload are being developed and deployed demonstrate main elements concept. We give overview program. details...
We present the first astronomical results from a 4K<sup>2</sup> Hybrid Visible Silicon PIN array detector (HyViSI) read out with Teledyne Scientific and Imaging SIDECAR ASIC. These include observations of standards photometric measurements using 2.1m KPNO telescope. also report test program in Rochester Detector Laboratory (RIDL), including: noise, dark current, linearity, gain, well depth, quantum efficiency, substrate voltage effects. Lastly, we highlight operation window mode discuss its...
A precise measurement of the Cosmic X-ray Background (CXB) is crucial for constraining models evolution and composition universe. While several large, expensive satellites have measured CXB as a secondary mission, there still disagreement about normalization its spectrum. The NanoSat (CXBN) small, low-cost satellite whose primary goal to measure over two-year lifetime. Benefiting from low instrument-induced background due small mass size, CXBN will use novel, pixelated Cadmium Zinc Telluride...
The Space-based Telescopes for Actionable Refinement of Ephemeris (STARE) program will collect the information needed to help satellite operators avoid collisions in space by using a network nano-satellites determine more accurate trajectories selected objects orbiting Earth. In first phase STARE program, two pathfinder cube-satellites (CubeSats) equipped with an optical imaging payload are being developed and deployed demonstrate main elements concept. this paper, we give overview program....
An algorithm for determining satellite track end points with subpixel resolution in spaced-based images is presented. The allows significant curvature the imaged due to rotation of spacecraft capturing image. motivation behind point determination first presented, followed by a description methodology used. Results from running on real ground-based and simulated are shown highlight its effectiveness.
We report on long exposure results obtained with a Teledyne HyViSI H2RG detector operating in guide mode. The sensor simultaneously nearly seeing-limited data while also guiding the Kitt Peak 2.1 m telescope. Results from unguided and guided operation are presented used to place lower limits flux/fluence values for accurate centroid measurements. significant noise reduction recent laboratory measurements that should further improve capability higher magnitude stars.
Abstract We present the final design, environmental testing, and launch history of MiniCarb, a 6U CubeSat developed through partnership between NASA Goddard Space Flight Center Lawrence Livermore National Laboratory. MiniCarb’s science payload, at Goddard, was an occultation-viewing, passive laser heterodyne radiometer for observing methane, carbon dioxide, water vapor in Earth’s atmosphere ∼1.6 µm s −1 . satellite, Livermore, implemented their Next Generation Bus plug-and-play architecture...
Abstract. Stellar occultation observations from space can probe the stratosphere and mesosphere at a fine vertical scale around globe. Unlike other measurement techniques like radiosondes aircraft, stellar has potential to observe atmosphere above 30 km, unlike radio occultation, probes fine-scale phenomena with atmospheric turbulence. We imaged refractive bending angle of star centroid for series occultations by atmosphere. Atmospheric refractivity, density, then temperature are retrieved...