Rocketborne Far-Infrared Circular-Variable Filter Spectrometer Development PDF Download
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Author: Clair L. Wyatt Publisher: ISBN: Category : Infrared spectroscopy Languages : en Pages : 26
Book Description
The report concerns the development of high-vacuum liquid-helium cooled circular-variable filter spectrometers. These spectrometers have been successfully used in rocketborne applications to make in situ measurements of the overhead spectral radiance, as a function of rocket height, of the atmospheric emission species in the long wavelength region of the infrared. This research led to the advancement of the state-of-the-art in such aerospace infrared measurements and in several related areas such as the detector-preamplifier interface and cold bearing design. A total of five rocket flights were conducted which resulted in measurements of the overhead radiance, as a function of rocket altitude between 45 and 200 km, of the atmospheric emissions in the 7 to 24 micrometer range of the infrared.
Author: Clair L. Wyatt Publisher: ISBN: Category : Infrared spectroscopy Languages : en Pages : 26
Book Description
The report concerns the development of high-vacuum liquid-helium cooled circular-variable filter spectrometers. These spectrometers have been successfully used in rocketborne applications to make in situ measurements of the overhead spectral radiance, as a function of rocket height, of the atmospheric emission species in the long wavelength region of the infrared. This research led to the advancement of the state-of-the-art in such aerospace infrared measurements and in several related areas such as the detector-preamplifier interface and cold bearing design. A total of five rocket flights were conducted which resulted in measurements of the overhead radiance, as a function of rocket altitude between 45 and 200 km, of the atmospheric emissions in the 7 to 24 micrometer range of the infrared.
Author: C. K. Hinrichs Publisher: ISBN: Category : Languages : en Pages : 29
Book Description
The technical note is one of a series that provides brief descriptions of scientific programs investigating the physics and chemistry of the upper atmosphere under normal and disturbed conditions in support of the High Altitude Effects Simulation (HAES) program of the Defense Nuclear Agency. In the absence of actual nuclear testing in the atmosphere a number of experiments are being carried out both in the laboratory and in the field to determine a sufficient number of parameters to characterize the environment and its reactions in a suitable model. This technical note describes one of these experiments. The circular variable filter (CVF) infrared spectrometer is one of the principal instruments used in rocket-borne experiments to measure auroral infrared emissions. The spectrometers described were developed by Utah State University and include both liquid nitrogen cooled short wavelength infrared and liquid helium cooled long wave infrared spectrometers. A brief description is also given of the CVF spectrometer experiments flown in the ICECAP 73 rocket series launched from Poker Flat, Alaska in March 1973.
Author: Publisher: ISBN: Category : Aeronautics Languages : en Pages : 1282
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: James W. Rodgers Publisher: ISBN: Category : Atmosphere, Upper Languages : en Pages : 0
Book Description
A liquid-helium-cooled long-wavelength infrared spectrometer was successfully launched on 22 March 1973 from the Poker Flats Research Facility, Alaska. This spectrometer, which employed a circular variable filter (CVF), was developed over a period of five years and provided the first measurements of the infrared spectrum of the upper atmospheric emissions between 7 and 24 micrometers. The data processing proceeded in a step-by-step manner to provide accurate final data with error limits and an understanding of the spectrometer performance. Each step of the data processing is presented in this report which will provide engineers with information on the spectrometer performance and data analysts with the basis for the final assignment of error limits. Similar procedures can also be used for the data reduction of other CVF flights.
Author: Clair L. Wyatt Publisher: ISBN: Category : Languages : en Pages : 36
Book Description
An infrared spectrometer used to obtain atmospheric emission spectra from a rocket at altitudes between 45 and 200 km in the ICECAP Auroral Measurements Program is described. The instrument continuously scanned the 6.75-23.2 micrometers spectral region at the rate of 2 scans per second. The instrument resolution of the spectrometer, which employed a circular-variable interference filter (CVF), ranged from 3 to 4 percent.
Author: R. M. Warner Publisher: ISBN: Category : Languages : en Pages : 38
Book Description
To permit accurate evaluation of previous airborne measurements, the AFCRL first-generation circular variable filter (CVF) spectrometer was calibrated in the AEROSPACE Research Chamber (7V). Testing consisted of calibration and linearity checks, angular response measurements, off-axis rejection measurements, and modulation transfer function determination. The calibration measurements defined the spectral radiance responsivity over a 4.0- to 13.0-micron wavelength range and the noise-equivalent radiance (NER) of the instrument. (Author).
Author: Clair L. Wyatt
Author: Clair L. Wyatt
Author: C. K. Hinrichs
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Author: James W. Rodgers
Author: Clair L. Wyatt
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Author: R. M. Warner
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