A Calibration of the Naval Postgraduate School Middle Ultraviolet Spectrograph and an Analysis of the OII 2470 A and OI 2972 A Emissions Obtained from Mid-Latitude Rocket Observations
Abstract
The MUSTANG instrument was calibrated using standard techniques to determine the sensitivity and wavelength calibrations and field of view. The instrument was launched aboard a NASA sounding rocket on March 30, 1990. Post- flight tests indicated that the calibration did not change as a result of the rocket experiment. Ultraviolet dayglow spectra of the Earth's ionosphere were obtained from approximately 100 km to 320 km in altitude over a wavelength range of 1800 A to 3400 A. The spectra were divided into 512 pixels of approximately 3.134 A per pixel. Analyses of the data from 2420 A to 2490 A and from 2920 A to 2972 A were conducted to obtain the intensity profiles of the OII 2470.4 A multiplet and the OI 2972.3 A line emission, respectively. The intensity profile of the OII 2470.4 A multiplet was found to have a broad peak of 1.6 kR centered at approximately 250 km. The intensity profile of the OI 2972.3 A line emission shows a general trend of decreasing intensity with altitude. The maximum intensity of 3.6 kR was found at 105 km and the minimum of 137 R at 315 km. A partial layer, with an intensity of 4.1 kR, was evident near 150 km.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1990
- Accession Number
- ADA240686
Entities
People
- Carl K. Andersen
Organizations
- Naval Postgraduate School