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Dr David Bramall's Outputs (3)

WIVERN: a laboratory experiment for testing novel laser-based wavefront sensing techniques (2022)
Presentation / Conference Contribution
Bharmal, N. A., Bramall, D., Calcines Rosario, A. Z., Morris, T. J., Schmoll, J., & Staykov, L. (2022, December). WIVERN: a laboratory experiment for testing novel laser-based wavefront sensing techniques. Presented at Adaptive Optics Systems VIII

WIVERN is a testbed for laboratory experiments in laser-based wavefront sensing. It emulates laser uplink from a 4m telescope with 1.6 arcsec seeing and laser back-scattering from up to 20 km. Currently there are three current wavefront sensing capab... Read More about WIVERN: a laboratory experiment for testing novel laser-based wavefront sensing techniques.

A four mirror anastigmat collimator design for optical payload calibration (2016)
Presentation / Conference Contribution
Rolt, S., Calcines, A., Lomanowski, B. A., & Bramall, D. G. (2016, December). A four mirror anastigmat collimator design for optical payload calibration. Presented at Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh

We present here a four mirror anastigmatic optical collimator design intended for the calibration of an earth observation satellite instrument. Specifically, the collimator is to be applied to the ground based calibration of the Sentinel-4/UVN instru... Read More about A four mirror anastigmat collimator design for optical payload calibration.

An efficient stable optical polariser module for calibration of the S4UVN earth observation satellite (2016)
Presentation / Conference Contribution
Rolt, S., Calcines, A., Lomanowski, B., Bramall, D., & Shaw, B. (2016, December). An efficient stable optical polariser module for calibration of the S4UVN earth observation satellite. Presented at Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh

We describe here an optical polariser module intended to deliver well characterised polarised light to an imaging spectrometer instrument. The instrument in question is the Sentinel-4/UVN Earth observation imaging spectrometer due to be deployed in 2... Read More about An efficient stable optical polariser module for calibration of the S4UVN earth observation satellite.