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Nanosatellite optical downlink experiment: design, simulation, and prototyping
The approach to transition prototype transmitter and receiver designs to a full end-to-end CubeSat-scale system is described, which includes link budget refinement, drive electronics miniaturization, packaging reduction, improvements to pointing and attitude estimation, implementation of modulation, coding, and interleaving, and ground station receiver design.
Optical Detection of Lasers with Near-term Technology at Interstellar Distances
This paper examines the ability to produce a laser beam detectable to a cursory survey (SNR 0.1% with a 1 m receive telescope) by an extraterrestrial intelligence using proven or near-term technology…
Laser Guide Star for Large Segmented-aperture Space Telescopes. I. Implications for Terrestrial Exoplanet Detection and Observatory Stability
Precision wavefront control on future segmented-aperture space telescopes presents significant challenges, particularly in the context of high-contrast exoplanet direct imaging. We present a new…
Design of a Space-Based Laser Guide Star Mission to Enable Ground and Space Telescope Observations of Faint Objects
We present the detailed design of a Laser Guide Star small satellite that would formation fly with a large space observatory or fly with respect to a ground telescope that use adaptive optics (AO)…
Analyzing Constellation Performance for the Radio Occultation Tomography of Internal Gravity Waves
- Riley M. Fitzgerald, Lucy Halperin, S. Leroy, Amelia Gagnon, K. Cahoy, J. Clark
- Environmental Science, PhysicsIEEE Journal of Selected Topics in Applied Earth…
Radio occultation cluster quality metrics predictive of internal gravity wave tomographic reconstruction error are presented and used to compare the performance of two alternative RO constellation geometries: mutual orbit groups (MOG) and a spread in right ascension of the ascending node (RAAN).
Diffraction analysis of Laser Guide Star enabled cophasing wavefront control for large segmented aperture space telescopes
Nonlinear Optics for Frequency-Doubling in Nanosatellite Laser Communication
Free-space optical communication attracts interest due to its promise of higher data rates for similar size, weight, and power costs compared with radio systems. However, while satellite-to-ground…
Capabilities of a Laser Guide Star for a Large Segmented Space Telescope
Satellite Laser Guide Stars for Large Aperture Segmented Ground Telescopes
In this work we consider using satellite laser guide stars to enable high contrast imaging with extremely large telescopes (ELTs). In 2010, Traub and Oppenheimer calculated that a natural or…
Orbital Maintenance of a Constellation of CubeSats for Internal Gravity Wave Tomography
- S. Leroy, Riley M. Fitzgerald, K. Cahoy, James M. Abel, J. Clark
- PhysicsIEEE Journal of Selected Topics in Applied Earth…
- 12 February 2020
Mission lifetime is the most critical consideration for a mission, thus electrospray propulsion is recommended for the constellation-flying of CubeSats, but the accelerations that they offer must be greatly increased to enable spacecraft separations useful for tomography of internal gravity waves.