PDS_VERSION_ID = PDS3
LABEL_REVISION_NOTE = "Initiated JMAFI, 2004-03-01"
OBJECT = INSTRUMENT
INSTRUMENT_HOST_ID = P10
INSTRUMENT_ID = UV
OBJECT = INSTRUMENT_INFORMATION
INSTRUMENT_NAME = "ULTRAVIOLET PHOTOMETER"
INSTRUMENT_TYPE = "ULTRAVIOLET SPECTROMETER"
INSTRUMENT_DESC = "
Instrument Overview
===================
The ultraviolet photometer investigated the ultraviolet reflective
properties or emission from interplanetary hydrogen, helium and
dust, and from Jupiter's atmosphere and satellites. It was hoped to
provide data to resolve the origin of interplanetary neutral
hydrogen and establish the boundaries of the heliosphere. From
measurements of the interplanetary helium, experimenters hoped to
determine the percentage of this gas in the interstellar medium.
The ultraviolet photometer had a fixed viewing angle and uses the
spin of the spacecraft to scan around the celestial sphere. When
close to Jupiter, the photometer scaned the medium above the cloud
tops. By measuring the changes in the intensity of ultraviolet light
reflected into two photocathodes of the instrument -- one measuring
radiation at 1216 Angstroms, the other at 584 Angstroms -- the
photometer detected light from hydrogen and helium respectively.
Within the Jovian system the photometer measured the scattering of
solar ultraviolet light by the atmosphere of Jupiter. This
scattering provided information on the amount of atomic hydrogen in
Jupiter's upper atmosphere, the mixing rate of Jupiter's atmosphere,
the amount of helium there, and therefore the ratio of helium to
hydrogen at Jupiter. Prior to Pioneer 10's mission helium had not
been identified at the planet.
By measuring changes in the ultraviolet light glow the instrument
checked to see if Jupiter has polar auroras.
['Instrument Overview' was adapted from FIMMELETAL pp. 56-57.]"
END_OBJECT = INSTRUMENT_INFORMATION
OBJECT = INSTRUMENT_REFERENCE_INFO
REFERENCE_KEY_ID = "FIMMELETAL1977"
END_OBJECT = INSTRUMENT_REFERENCE_INFO
OBJECT = INSTRUMENT_REFERENCE_INFO
REFERENCE_KEY_ID = "JUDGEETAL1976"
END_OBJECT = INSTRUMENT_REFERENCE_INFO
END_OBJECT = INSTRUMENT
END
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