NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
A study of the feasibility of ultraviolet spectrometry for cometary missionsUltraviolet spectra fo the comet West obtained by sounding rocket experiments in 1976 are reproduced and interpreted in order to estimate the expected brightness of the emission features and determine the spatial extent of these features for the proposed Halley Flyby/Tempel 2 rendezvous and the possible Halley or Encke flybys close to perihelion. A coma model was constructed and evaluated for the physical condition of candidate targets such as heliocentric distance, gas production, and composition. In addition to brightness profiles, the neutral and ion densities of the principal species are also dervied. The brightness profiles can be used to determine the feasibility of utilizing the space telescope to provide supporting observations during the mission. Basic parameters identified are spectral range, wavelength resolution, spatial resolution, sensitivity and dynamic range, rejection of scattered light, and integration or accumulation time.
Document ID
19790014816
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Feldman, P. D. (Johns Hopkins Univ. Baltimore, MD, United States)
Date Acquired
September 3, 2013
Publication Date
February 28, 1979
Subject Category
Lunar And Planetary Exploration
Report/Patent Number
NASA-CR-158492
Accession Number
79N22987
Funding Number(s)
CONTRACT_GRANT: NSG-7382
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available