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Mars 1064 nm spectral radiance measurements determined from the receiver noise response of the Mars Orbiter Laser Altimeter

Zuber, Maria T.; Sun, Xiaoli; Neumann, Gregory A. +1 more

A technique was developed to compute the radiance of the scene viewed by the optical receiver of the Mars Orbiter Laser Altimeter. The technique used the detection threshold and the false detection rate of the receiver to provide a passive radiometry measurement of Mars at the 1064 nm wavelength over a 2 nm bandwidth and subkilometer spatial resol…

Laboratory Studies of Alkali Metal Filter Deposition, Ultraviolet Transmission, and Visible Blocking

Trauger, John T.; Vincent, Mark B.; Clarke, John T. +4 more

Far-ultraviolet alkali metal or Wood s filters have been produced and tested supporting the production of a flight filter for the Wide Field Planetary Camera 2 on the Hubble Space Telescope. Sodium layers 0.5 1- m thick transmit up to 40% in the ultraviolet while efficiently blocking visible wavelengths. The prevention of visible pinholes is assis…

Hubble Space Telescope Faint Object Camera calculated point-spread functions

Hollis, J. M.; Dorband, J. E.; Lyon, R. G.

A set of observed noisy Hubble Space Telescope Faint Object Camera point-spread functions is used to recover the combined Hubble and Faint Object Camera wave-front error. The low-spatial-frequency wave-front error is parameterized in terms of a set of 32 annular Zernike polynomials. The midlevel and higher spatial frequencies are parameterized in …

Phase-retrieval analysis of pre-and post-repair Hubble Space Telescope images

Krist, John E.; Burrows, Christopher J.

Phase-retrieval measurements of point-spread functions from the pre- and post-repair Hubble Space Telescope are presented. The primary goal was to determine the aberrations present in the second wide-field and planetary camera (WFPC2) to align and validate its corrective optics. With both parametric model-fitting techniques and iterative (Gerchber…

Combined approach to the Hubble Space Telescope wave-front distortion analysis.

Roddier, Claude; Roddier, Francois

Stellar images taken by the Hubble Space Telescope at various focus positions have been analyzed to estimate wave-front distortion. Rather than using a single algorithm, the authors found that better results were obtained by combining the advantages of various algorithms. For the planetary camera, the most accurate algorithms consistently gave a s…

Maximum entropy restoration of blurred and oversaturated Hubble Space Telescope imagery

Dorband, J. E.; Bonavito, N. L.; Busse, T.