Rocket-borne Spectral Measurement of Atmospheric Infrared Emission During a Quiet Condition in the Auroral Zone


Book Description

A Nike-Javelin rocket (NJ-74-1) was launched at Poker Flat, Alaska, on 11 Apr 74 at 0801 hours UT during a non-auroral condition. A near-zenith spectral radiance profile was obtained from 54 km to an apogee of 118 km on ascent and from 118 km down to about 85.6 km on descent, using a circular variable filter spectrometer. About 464 spectral scans were obtained during flight, covering the range from 1.7 to 5.4 micrometers at a resolution of about 4 percent. The dominant emission feature was at 4.3 micrometer, which is attributed to the CO2 nu3 fundamental. The upward viewed spectral radiance appeared to range from about 215 MRmicrometer at 54 km to less than the noise equivalent spectral radiance of 3 MR /micrometer at 118 km. In this report are given the first quiet condition (no aurora) rocket data in the auroral zone. (Author).




Scientific and Technical Aerospace Reports


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.




LWIR (7-24 Micrometer) Measurements from the Launch of a Rocketborne Spectrometer Into a Quiet Atmosphere (1974)


Book Description

A liquid-helium-cooled, long-wavelength infrared (LWIR) spectrometer was successfully launched on 14 Feb 1974 from the University of Poker Flat Research Range at Chatanika, Alaska, part of the DNA ICECAP 74 Program. The Spectrometer, which employs a circular-variable filter, was almost identical to one flown on 22 Mar 1973 that provided the first measurements of the altitude profile of the infrared spectrum of the upper-atmospheric emissions between 7 and 24 micrometers. The 1973 measurements were from an energetically pumped atmosphere during the occurrence of an IBC II aurora. The objective of the 1974 flight was to obtain emission data from an aurorally quiet atmosphere to determine the contribution of the auroral energy input to the data obtained in 1973. The payload was successfully launched during nonauroral conditions, and data were obtained on the 15 micrometer carbon dioxide (nu 2) emission from 74 to 160 km and on the 9.6 micrometer ozone (nu 3) emission between 74 and 110 km. Above 110 km, significant unidentified emission was again observed at 9.3 micrometers.




Rocketborne Measurement of an Infrared Enhancement Associated with a Bright Auroral Breakup


Book Description

A Paiute-Tomahawk sounding rocket containing a 1.5-5.3 micrometers cryogenically cooled spectrometer was flown into a very bright (IBC III+) auroral breakup from Poker Flat, Alaska. The main emission features at 2.8, 4.3, and 5.3 micrometers were all found to be enhanced due to the large energy input to the atmosphere associated with the aurora. The most prominent enhancement occurred in the 4.3 micrometers region. (Author).




High Altitude Effects Simulation (HAES) Program. Report No. 1


Book Description

An Astrobee D rocket (A30.205-4) was launched at Poker Flat, Alaska, on 9 March 1972 at 1052 hours UT during a condition of Class IBC2 post-breakup auroral display. A near-zenith spectral radiance profile was obtained from 48.5 km to an apogee of 91.9 km on ascent, and from 91.9 km down to about 84.7 km on descent, using a circular variable-filter spectrometer. About 268 spectral scans were obtained during flight, covering the range from 1.4 to 5.0 micrometer at a resolution of about 4 per cent. The dominant emission feature was at 4.3 micrometer, which is attributed to the CO2 nu(3) fundamental. The upward-viewed spectral radiance appeared to range from about 45 MR/micrometer at 48.5 km to less than 2 MR/micrometer at 92 km. A volume-emission-rate/altitude profile for the nu(3) fundamental of CO2 is presented. The profile is based on a simple LTE model and neglects radiation transport. As a result, the model cannot be compared directly with the data. A more complete analysis of the problem is in progress. (Author).










Atmospheres of Earth and the Planets


Book Description

This book contains the lectures presented at the Summer Advanced Study Institute, 'Physics and Chemistry of Atmospheres' which was held at the University of Liege, Belgium, during the period July 29-August 9, 1974. One-hundred nineteen persons from eleven different countries attended the Institute. The authors and publisher have made a special effort for rapid publication of an up to-date status of the physics and chemistry ofthe atmospheres of Earth and the plan ets, which is an ever-changing area. Special thanks are due to the lecturers for their diligent preparation and excellent presentations. The individual lectures and the published papers were deliberately limited; the authors' cooperation in conforming to these specifications is greatly appreciated. The contents of the book are organized by subject area rather than in the order in which papers were presented during the Institute. Many thanks are due to Drs Alv Egeland, Donald M. Hunten, Gunther Lange-Hesse, Marcel Nicolet, Harold I. Schiff, Lance Thomas, Alister Vallance Jones, Richard Wayne, and Gilbert Weill who served as session chairmen during the Institute and contributed greatly to its success by skillfully directing the discussion period in a stimulating manner after each lecture. Many persons contributed to the success of the Institute. Drs Alv Egeland, Donald M. Hunten, Gunther Lange-Hesse, Marcel Nicolet, Harold I. Schiff, Erwin R. Schmerling, Lance Thomas, Alister Vallance Jones, Richard Wayne, and Gilbert Weill were especially helpful in preparing the technical program.




Report on Research at AFCRL.


Book Description




The Sun, the Earth, and Near-earth Space


Book Description

" ... Concise explanations and descriptions - easily read and readily understood - of what we know of the chain of events and processes that connect the Sun to the Earth, with special emphasis on space weather and Sun-Climate."--Dear Reader.