Dr. Ernest Hilsenrath Profile

Dr. Ernest Hilsenrath

at NASA Headquarters

SPIE Involvement:

Author

Publications (24)

Proceedings Article | 21 November 2017

Ozone monitoring instrument flight-model on-ground and inflight calibration

Marcel Dobber, Ruud Dirksen, Pieternel Levelt, Gijsbertus van den Oord, Glen Jaross, Matt Kowalewski, George Mount, Donald Heath, Ernest Hilsenrath, Richard Cebula

Proc. SPIE. 10568, International Conference on Space Optics — ICSO 2004

KEYWORDS: Calibration, Diffusers, Mirrors, Aluminum, Sensors, Spectral calibration, Data processing, Ozone, Charge-coupled devices, Reflectivity

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Proceedings Article | 19 December 2008 Paper

Earth observations informing energy management: a CEOS and GEOSS perspective

Richard Eckman, Brian Killough, Ernest Hilsenrath

Proc. SPIE. 7151, GEOSS, CEOS, and the Future Global Remote Sensing Space System for Societal Benefits

KEYWORDS: Solar energy, Renewable energy, Data modeling, Atmospheric modeling, Wind energy, Satellites, Solar radiation models, Energy efficiency, Systems modeling, Environmental sensing

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Proceedings Article | 29 August 2005 Paper

Algorithm science to operations for the National Polar-orbiting Operational Environmental Satellite System (NPOESS) ozone mapping and profiler suite (OMPS)

James Duda, Suzanna Barth, Lawrence Flynn, Maria Caponi, Ernest Hilsenrath

Proc. SPIE. 5890, Atmospheric and Environmental Remote Sensing Data Processing and Utilization: Numerical Atmospheric Prediction and Environmental Monitoring

KEYWORDS: Sensors, Algorithm development, Ozone, Data conversion, Calibration, Satellites, Data processing, Algorithms, Space operations, Associative arrays

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Proceedings Article | 26 October 2004 Paper

Retrievals from the Limb Ozone Retrieval Experiment on STS107

David Flittner, Ernest Hilsenrath, Scott Janz, Robert Loughman, Richard McPeters, Didier Rault

Proc. SPIE. 5542, Earth Observing Systems IX

KEYWORDS: Ozone, Aerosols, Clouds, Scattering, Stray light, Rayleigh scattering, Atmospheric modeling, Scatter measurement, Light scattering, Data modeling

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Proceedings Article | 15 October 2004 Paper

Stray light characterization of the Limb Ozone Retrieval Experiment

David Flittner, Scott Janz, Ernest Hilsenrath, Richard McPeters

Proc. SPIE. 5526, Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control

KEYWORDS: Stray light, Point spread functions, Ozone, Calibration, Light scattering, Ultraviolet radiation, Scatter measurement, Deconvolution, Atmospheric modeling, Data modeling

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Proceedings Article | 2 February 2004 Paper

The on-ground calibration of the ozone monitoring instrument from a scientific point of view

Ruud Dirksen, Marcel Dobber, Pieternel Levelt, Gijsbertus van den Oord, Glen Jaross, Matthew Kowalewski, George Mount, Donald Heath, Ernest Hilsenrath, Johan de Vries

Proc. SPIE. 5234, Sensors, Systems, and Next-Generation Satellites VII

KEYWORDS: Calibration, Diffusers, Absorption, Spectral calibration, Aluminum, Ozone, Sensors, Mirrors, Reflectivity, Spectrographs

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Proceedings Article | 10 November 2003 Paper

Atmospheric products from the ozone monitoring instrument (OMI)

Suraiya Ahmad, Pieternel Levelt, Pawan Bhartia, Ernest Hilsenrath, Gilbert Leppelmeier, James Johnson

Proc. SPIE. 5151, Earth Observing Systems VIII

KEYWORDS: Ozone, Clouds, Aerosols, Ultraviolet radiation, Data archive systems, Gases, Calibration, Satellites, Sensors, Atmospheric chemistry

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Proceedings Article | 17 January 2002 Paper

Ozone monitoring instrument (OMI)

Johan de Vries, Gijsbertus van den Oord, Ernest Hilsenrath, Maurice te Plate, Pieternel Levelt, Ruud Dirksen

Proc. SPIE. 4480, Imaging Spectrometry VII

KEYWORDS: Charge-coupled devices, Sensors, Polarization, Stray light, Ozone, Calibration, Diffusers, Distortion, Mirrors, CCD image sensors

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Proceedings Article | 12 December 2001 Paper

Toward the use of the Ozone Monitoring Instrument (OMI)

Erik Laan, Dolf de Winter, Johan de Vries, Pieternel Levelt, Gijsbertus van den Oord, Anssi Malkki, Gilbert Leppelmeier, Ernest Hilsenrath

Proc. SPIE. 4540, Sensors, Systems, and Next-Generation Satellites V

KEYWORDS: Calibration, Charge-coupled devices, Diffusers, Ozone, Sensors, Mirrors, Data processing, Telescopes, Satellites, Ultraviolet radiation

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Proceedings Article | 15 November 2000 Paper

Ozone monitoring with the OMI instrument

Erik Laan, Johan de Vries, Bob Kruizinga, Huib Visser, Pieternel Levelt, Gijsbertus van den Oord, A. Maelkki, Gilbert Leppelmeier, Ernest Hilsenrath

Proc. SPIE. 4132, Imaging Spectrometry VI

KEYWORDS: Charge-coupled devices, Sensors, Ozone, Diffusers, CCD image sensors, Polarization, Telescopes, Calibration, Mirrors, Ultraviolet radiation

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Proceedings Article | 24 September 1999 Paper

Scientific requirements and optical design of the ozone monitoring instrument on EOS-CHEM

Piet Stammes, Pieternel Levelt, Johan de Vries, Huib Visser, Bob Kruizinga, Kees Smorenburg, Gilbert Leppelmeier, Ernest Hilsenrath

Proc. SPIE. 3750, Earth Observing Systems IV

KEYWORDS: Ozone, Ultraviolet radiation, Charge-coupled devices, Aerosols, Mirrors, Clouds, Calibration, Gases, NOx, Optical design

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Proceedings Article | 27 October 1998 Paper

Backscatter ultraviolet instrument solar diffuser degradation

Glen Jaross, Richard Cebula, Matthew DeLand, K. Steinfeld, Richard McPeters, Ernest Hilsenrath, Arlin Krueger

Proc. SPIE. 3427, Optical Systems Contamination and Degradation

KEYWORDS: Diffusers, Reflectivity, Space operations, Aluminum, Calibration, Ultraviolet radiation, Lamps, Backscatter, Contamination, Absorption

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Proceedings Article | 18 August 1998 Paper

Characterization of a hardened ultrastable UV linear variable filter and recent results on the radiometric stability of narrowband interference filters subjected to temperature/humidity, thermal/v

Donald Heath, Ernest Hilsenrath, Scott Janz

Proc. SPIE. 3501, Optical Remote Sensing of the Atmosphere and Clouds

KEYWORDS: Transmittance, Optical filters, Interference filters, Humidity, Temperature metrology, Linear filtering, Signal to noise ratio, Ionizing radiation, Sensors, Ultraviolet radiation

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Proceedings Article | 31 December 1997 Paper

Calibration and characterization of remote sensing instruments using ultrastable interference filters

Donald Heath, Zongying Wei, Ernest Hilsenrath, Scott Janz

Proc. SPIE. 3221, Sensors, Systems, and Next-Generation Satellites

KEYWORDS: Interference filters, Remote sensing, Calibration, Monochromators, Thermal energy technology, Stray light, Environmental sensing, Aerospace engineering, Spectral calibration

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Proceedings Article | 11 November 1996 Paper

Radiometric calibration of second-generation Total Ozone Mapping Spectrometer (TOMS)

Hongwoo Park, Arlin Krueger, Ernest Hilsenrath, Glen Jaross, Robert Haring

Proc. SPIE. 2820, Earth Observing System

KEYWORDS: Calibration, Diffusers, Ozone, Mirrors, Collimation, Bidirectional reflectance transmission function, Integrating spheres, Lamps, Free electron lasers, Satellites

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Proceedings Article | 8 November 1996 Paper

Remote sensing applications of continuous spectral backscatter ultraviolet measurements

Joanna Joiner, Pawan Bhartia, Ernest Hilsenrath

Proc. SPIE. 2831, Ultraviolet Atmospheric and Space Remote Sensing: Methods and Instrumentation

KEYWORDS: Clouds, Ozone, Ultraviolet radiation, Calibration, Backscatter, Satellites, Scattering, Remote sensing, Ions, Radiative transfer

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Proceedings Article | 8 November 1996 Paper

Rayleigh scattering attitude sensor

Scott Janz, Ernest Hilsenrath, David Flittner, Donald Heath

Proc. SPIE. 2831, Ultraviolet Atmospheric and Space Remote Sensing: Methods and Instrumentation

KEYWORDS: Sensors, Rayleigh scattering, Calibration, Ultraviolet radiation, Diodes, Infrared sensors, Bandpass filters, Detector arrays, Earth's atmosphere, Space telescopes

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Proceedings Article | 21 December 1994 Paper

Spectroradiometric calibration and validation of space instruments used to derive long-term changes in stratospheric ozone using the solar backscattered ultraviolet radiation technique

Donald Heath, Zongying Wei, Ernest Hilsenrath, William Fowler, V. Nelson, Roel Hoekstra, Carina Olij, Scott Janz

Proc. SPIE. 2318, Recent Advances in Remote Sensing and Hyperspectral Remote Sensing

KEYWORDS: Calibration, Diffusers, Optical spheres, Bidirectional reflectance transmission function, Spectral calibration, Ozone, Spherical lenses, Free electron lasers, Lamps, Aerospace engineering

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Beginning in the mid 1960's large aperture scanning radiometers have been used in space to determine spectroradiometric properties of earth scenes in the red and near infrared regions. Panel diffusers as calibration sources for these radiometers were abandoned in favor of internally illuminated integrating spheres because of problems of illuminating the panel diffuser uniformly.1 Since 1970 spectroradiometric instruments used in space for remote sensing of the atmosphere in the ultraviolet for the determination of stratospheric ozone and total column amounts have used spectral radiance calibrations derived from calibrated panel diffusers illuminated by NIST standards of spectral irradiance. An advantage of the panel diffuser technique is simplicity of the experimental set up. Stratospheric ozone profiles and total column amounts are derived from ratios of atmospheric radiances to corresponding solar irradiances incident at the top of the atmosphere in the wavelength region of 250 - 340 nm. An inherent problem associated with measurements for the remote sensing of stratospheric ozone which is not shared with remote sensing measurements of earth scenes at longer wavelengths of the solar scattering and reflective region is the extremely large dynamic range of atmospheric radiances and the steep gradients of radiance with wavelength. For a typical wavelength scan the spectral radiance changes by about lO and the average signal level of a spectral scan can shift by another factor of 25 or more due to solar zenith angle changes between the subsolar point and the solar zenith angle limit of useful scan information which is within a couple of degrees of the terminator. The derivation of spectral radiance calibrations using either the sphere or panel diffuser techniques for ultraviolet remote sensing instruments are single point calibrations at each wavelength. A subsequent linearity calibration of the detector and electronics is made in non dispersed or white light over the entire dynamic range of the instrument of more than six decades. Consequently the derived radiometric calibration constants consist of a radiometric sensitivity term and a signal dependent linearity correction. An initial comparison of spectral radiance calibrations of SBUV-2 instruments using spherical integrator and panel diffuser techniques has been given by Heath et al.2. Subsequent work by Heath et al. describes the results from comparisons of four spectral radiance calibrations derived using panel diffuser techniques with five spectral radiance calibrations derived using spherical integrator techniques for three different SBUV-2 instruments. The comparability of the sphere and panel diffuser spectral radiance calibration techniques is assesed by comparing derived average BRDF values of panel diffusers based upon the sphere technique with laboratory measurements of BRDF of the panel diffusers. The sphere radiances determined relative to NIST standards of spectral irradiance are compared with measurements of sphere radiance relative to a NIST high temperature blackbody source. This work describes the evaluation of the consistency of spectral radiance calibration scales established using panel diffuser and internally illuminated spherical integrator techniques for the SSBUV and SBUV-2 Flight Model 5 instruments using zenith sky radiance measurements as a function of solar zenith angle (UMKEHR) which coincident in space and time. Also described are the spectral radiance calibrations of the Global Ozone Monitoring Experiment (GOME) with the NASA sphere which has been used to intercalibrate SBUV-2 and SSBUV instruments. These spectral radiance calibration constants are compared with those derived using a Spectralon panel diffuser whose BRDF was measured at NASA Goddard Space Flight Center by J. Butler.

SPIE Journal Paper | 1 November 1994

Effects of Space Shuttle flight on the reflectance characteristics of diffusers in the near-infrared, visible, and ultraviolet regions

Ernest Hilsenrath, Howard Herzig, Donald Williams, Carol Bruegge, Albert Stiegman

OE Vol. 33 Issue 11

KEYWORDS: Diffusers, Reflectivity, Aluminum, Contamination, Ultraviolet radiation, Calibration, Ozone, Space operations, Visible radiation, Environmental sensing

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Proceedings Article | 14 September 1994 Paper

Comparisons of UV spectral radiance calibrations of SBUV/2 type ozone monitoring instruments and traceability to NIST

Donald Heath, Zongying Wei, William Fowler, V. Nelson, James Butler, Ernest Hilsenrath

Proc. SPIE. 2282, Ultraviolet Technology V

KEYWORDS: Diffusers, Optical spheres, Calibration, Bidirectional reflectance transmission function, Spectral calibration, Spherical lenses, Ultraviolet radiation, Black bodies, Lamps, Free electron lasers

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Proceedings Article | 13 September 1994 Paper

Comparability of spectral radiance calibrations of large aperture earth observing instruments based upon diffuse reflective panels and internally illuminated spherical integrator techniques

Donald Heath, Zongying Wei, William Fowler, V. Nelson, Ernest Hilsenrath

Proc. SPIE. 2209, Space Optics 1994: Earth Observation and Astronomy

KEYWORDS: Diffusers, Optical spheres, Calibration, Bidirectional reflectance transmission function, Spectral calibration, Spherical lenses, Lamps, Phase transfer function, Free electron lasers, Reflectivity

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Proceedings Article | 6 December 1993 Paper

Effects of space shuttle flight on the reflectance characteristics of diffusers in the NIR, VIS, and UV

Ernest Hilsenrath, Howard Herzig, Donald Williams, Carol Bruegge, Albert Stiegman

Proc. SPIE. 2018, Passive Materials for Optical Elements II

KEYWORDS: Diffusers, Reflectivity, Aluminum, Contamination, Ultraviolet radiation, Calibration, Optical components, Near infrared, Ozone, Environmental sensing

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