Geometric Aspects of Rocket Photometry.
Abstract
This report describes the derivation and application of a technique to transform oblique rocket photometric measurements of emission phenomena to vertical altitude (zenith) profiles and the subsequent derivation of volume emission rates. The van Rhijn method of aspect correction is analyzed including limitations of the method when applied to D and E region emission measurements. A theoretical study is presented in which the general rocketborne photometer geometry is solved for a set of practical volume emission rate cases. The study definitizes the effects of finite fields of view, system directional responsivity and extinction on interpretation of measured emission data and derived volume emission rates. The results of the theoretical study are applied to an actual photometric measurement accomplished on rocket A17.110-3 flown from Poker Flat Rocket Range in Alaska on 16 March 1972. Zenith profiles are derived from oblique hydroxyl emission measurements in the band 1.67 to 1.90 micrometers band made at 60, 70, and 80 deg zenith angle as the rocket ascended. Volume emission rates deduced from these zenith profiles are consistant with results reported in the literature. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1976
- Accession Number
- ADA024947
Entities
People
- Leo A. Whelan
- William F. Grieder
Organizations
- Utah State University