In this talk we report on the development of OISL terminals at Honeywell for high-speed crosslinks in LEO mega constellations, optical downlinks for EO data transfer, and QKD applications. Since 2017 Honeywell has been actively developing a 100 mm class, high-reliability OISL laser communication terminal named the LCT100. Honeywell has also been developed terminals suitable for quantum communication and QKD applications, including a quantum-enabled version of the LCT100 crosslink terminal, and a 250 mm class terminal for Canada’s Quantum Encryption and Science Satellite (QEYSSat) which is capable of distributing provably secure encryption keys to ground stations separated by 400 km or more. Major technical challenges include accurate pointing and tracking, polarization-management throughout the optical chain, and deep suppression of background and stray light sources, given the nature of single photon exchange over large distances. Honeywell will fly both QKD and classical terminals on the upcoming QEYSSat mission and in this talk we discuss the design and the readiness of these technologies to address the current challenges in LEO crosslinks and FSO communications.
KEYWORDS: Tunable filters, James Webb Space Telescope, Sensors, Electronics, Mirrors, Stars, Space operations, Interfaces, Control systems, Optical filters
The science instrumentation for the James Webb Space Telescope (JWST) has concluded its Phase A definition stage. We have developed a concept for the JWST Fine Guidance Sensor (FGS), which will form the Canadian contribution to the mission. As part of the JWST re-plan in early 2003, the FGS design was recast to incorporate a narrow-band (R~100) science-imaging mode. This capability was previously resident in the NIRCam instrument. This FGS science mode makes use of tunable filters and filter wheels containing blocking filters, calibration sources and aperture masks. The science function of the FGS Tunable Filters (FGS-TF) remains complementary to the NIRCam science goals. Narrow-band FGS-TF imaging will be employed during many of the JWST deep imaging surveys to take advantage of the sensitivity to emission line objects. The FGS-TF will also provide a coronagraphic capability for the characterization of host galaxies of active galactic nuclei and for the characterization of extra solar planets. The primary function of the FGS remains to provide the sensor data for the JWST Observatory line-of-sight stabilization system. We report here on the overall configuration of the FGS and we indicate how the concept meets the performance and interface requirements.
SWIFT is a small (< 85 kg, approximately 0.5 m3, < 100 W) satellite instrument which is designed to accurately measure global horizontal winds and ozone concentrations in the stratosphere. SWIFT is similar to the highly successful WINDII instrument currently operating on the UARS satellite. Both use a field-widened Michelson interferometer set at high path difference to image the Doppler shift of atmospheric emission. The data set provided by SWIFT will provide essential input to the next generation of Numerical Weather Prediction (NWP) models which are currently being developed by meteorological organizations worldwide. SWIFT is currently a leading candidate to fill the foreign instrument opening for the NASDA GCOM-A1 mission, providing highly complimentary data to the ODUS and SOFIS instruments. SWIFT allows direct measurement of stratospheric dynamics and high vertical resolution ozone profiling to maximize the scientific return for this mission.
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