NDLI: Nitric acid oxide mixing ratio measurements using a rocket launched chemiluminescent instrument

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Nitric acid oxide mixing ratio measurements using a rocket launched chemiluminescent instrument

Content Provider	NASA Technical Reports Server (NTRS)
Author	Horvath, Jack J.
Copyright Year	1989
Description	A total of 18 rocket launched parachute borne nitric oxide instruments were launched from 1977 to 1985. A very precise instrument for the measurement of the nitric oxide mixing ratio was fabricated. No changes were made in the main body of the instruments, i.e., things associated with the reaction volume. Except for the last 4 launches, however, it did not yield the required absolute values that was hoped for. Two major problems were encountered. First, the wrong choice of the background calibration gas, nitrogen, caused the first 10 data sets to be too low in the absolute mixing ratio by nearly the order of 2 to 5 ppbv. The error was realized, and air was substituted for the bias gas measurement. Second, in the desire to extend the measurement to higher altitudes, the problem of contaminating the inlet flow tube with ozone from the reagent gas was encountered. The ozone valve was opened too early in the flight and this caused the pressure in the reaction volume to exceed the pressure at the flow tube entrance, permitting the ozone to migrate backwards. This problem was restricted to an altitude above 45 km.
File Size	1889971
Page Count	67
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19890008588
Archival Resource Key	ark:/13960/t3033rd3q
Language	English
Publisher Date	1989-01-30
Access Restriction	Open
Subject Keyword	Geophysics Atmospheric Composition Atmospheric Chemistry Emission Spectra Calibrating Nitric Oxide Ozone Chemiluminescence Nitric Acid Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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