Date of launch (range):
June 21, 1975 (ETR)
Launch vehicle:
Delta 1910
Shape:
rectangular-shaped sail atop a lower
wheel-like structure composed of 9 wedges with 3
stabilization arms
Weight (kg):
1052
Dimensions (m):
3.25, height
2.10, sail diameter
1.52, wheel diameter
Power source:
solar cells plus NiCd
batteries
Prime contractor:
Hughes Aircraft Company
Date of reentry:
In orbit 1984
Responsible NASA center:
GSFC
Project manager:
Robert H. Pickard
Project scientist:
S. P. Maran
Objectives:
To investigate the sun's lower
corona, the chromosphere, and their interface in the uv
spectral region to better understand the transport of energy
from the photosphere into the corona.
Experiments (responsible
organization):
High-resolution ultraviolet
spectrometer (Univ. of Colorado) Chromosphere study (Centre
National de la Recherche Scientifique)
High-sensitivity crystal spectrometer
and polarimeter (Columbia)
Mapping x-ray heliometer (Lockheed
Missiles & Space Co.)
Soft x-ray background radiation
(Univ. of Wisconsin)
Cosmic x-ray spectroscopy
(GSFC)
High-energy celestial x-ray
(GSFC)
xuv radiation (Naval Research
Laboratory)
Results:
Successful; satellite turned off in
Sept. 1978.
Reference: MOR S-821-75-09, June 4, 1975.