Pioneer Imaging Photopolarimeter Optical System

Pellicori, S. F.; Russell, E. E.; Watts, L. A.

doi:10.1364/ao.12.001246

Cited by 47 publications

(18 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to in situ measurements, Pioneer 10 and 11 observed the optical-wavelength intensity of the background through the Solar system with a two-band imaging photopolarimeter46. The Pioneer 10 measurements from 2.4 to 3.2 a.u.…”

Section: Methodsmentioning

confidence: 99%

Measurement of the cosmic optical background using the long range reconnaissance imager on New Horizons

et al. 2017

View full text Add to dashboard Cite

The cosmic optical background is an important observable that constrains energy production in stars and more exotic physical processes in the universe, and provides a crucial cosmological benchmark against which to judge theories of structure formation. Measurement of the absolute brightness of this background is complicated by local foregrounds like the Earth's atmosphere and sunlight reflected from local interplanetary dust, and large discrepancies in the inferred brightness of the optical background have resulted. Observations from probes far from the Earth are not affected by these bright foregrounds. Here we analyse the data from the Long Range Reconnaissance Imager (LORRI) instrument on NASA's New Horizons mission acquired during cruise phase outside the orbit of Jupiter, and find a statistical upper limit on the optical background's brightness similar to the integrated light from galaxies. We conclude that a carefully performed survey with LORRI could yield uncertainties comparable to those from galaxy counting measurements.

show abstract

Section: Methodsmentioning

confidence: 99%

Measurement of the cosmic optical background using the long range reconnaissance imager on New Horizons

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The IPP can be operated in three different modes: color imaging of Jupiter, polarimetry of the planets, and mapping of the sky glow (zodiacal light mode). A detailed description of the IPP is given by Pellicori et al [1973], and the results of early zodiacal light observations from Pioneer 10 are given by Weinberg et al [1973]. The imaging and polarimetry are being carried out by the University of Arizona [Swindell and Doose, 1974;Tomasko et al, 1974;Coffeen, 1974].…”

Section: Pioneer 10 and 11 Zodiacal Light Experimentsmentioning

confidence: 99%

Background Starlight observed from Pioneer 10

Weinberg¹,

Hanner²,

Beeson³

et al. 1974

J. Geophys. Res.

View full text Add to dashboard Cite

After passage through the asteroid belt the Pioneer 10 imaging photopolarimeter observed integrated starlight and diffuse galactic light for the first time in the absence of zodiacal light. Brightnesses in the blue are presented with and without individually resolved stars for regions of the sky observed when Pioneer 10 was 4.64 AU from the sun. The Pioneer 10 and 11 asteroid-Jupiter probes have provided the first opportunity to determine the spatial distribution of interplanetary dust beyond I AU and to map the background starlight in the absence of the atmospheric radiations and of zodiacal light, two of the primary objectives of the Pioneer 10 and 11 zodiacal light experiment. In this paper we present the results of background starlight observations obtained by Pioneer 10 beyond the asteroid belt and outline the methods and results of removing the effects of individually resolved stars. In the following paper [Hanner et al., 1974] we determine the spatial extent of zodiacal light and examine the contribution of the asteroid belt to the observed ß zodiacal light. 60 , 55 50 45 40 i=l.o 35 2.5 20 15 I0 ß ß ß 75 125 • ß ß ,oo. ß 150 125

show abstract

“…The optical, mechanical, and electronic details of the IPP have been described fully elsewhere [Pellicori et al, 1973]. It is sufficient here to review the pertinent parameters that affect the quality and quantity of the images obtained.…”

Section: Instrument Descriptionmentioning

confidence: 99%

The Imaging Experiment on Pioneer 10

Swindell¹,

Doose

1974

J. Geophys. Res.

View full text Add to dashboard Cite

In the period 4-4 days from Jovian pericenter, Pioneer 10 returned data from 153 imaging sequences. Data were obtained with the imaging photopolarimeter, a 2.54 cm diameter and 8.6 cm focal length steerable telescope configured as a narrow beam (0.5 mrad) ph6tometer in a spin scan mode of operation. Images were obtained in two spectral bands (390-500 nm and 595-720 nm), and seven of the most interesting pictures are shown and discussed.The imaging photopolarimeter (IPP) carried on Pioneer l0 gathers data in three different modes of operation. These modes differ mainly in the sensitivity and the instantaneous field of view (IFOV) of the instrument. The most sensitive mode (M2), which was used extensively during cruise for zodiacal light measurements, was not used at encounter. However, extensive use was made of the other two modes (M3 and M4) for gathering photometric and polarimetric data on Jupiter over a wide range of phase angles and distances. These data are being reduced, and it is expected that our knowledge concerning the shape, size, and refractive index of the cloud particles and the gas abundance above the Jovian clouds will be improved considerably. Mode 4 operation has the smallest IFO¾, and data gathered in this mode can•also be displayed in the form of images. This article will discuss how the images are obtained and displayed, and it will include a description of some of the more significant features that have been observed in the images produced to date. INSTRUMENT DESCRIPTIONThe optical, mechanical, and electronic details of the IPP have been described fully elsewhere [Pellicori et al., 1973]. It is sufficient here to review the pertinent parameters that affect the quality and quantity of the images obtained.The IPP is a 2.5 cm diameter and 8.6 cm focal length telescope that is movable in elevation from the spin axis of the Pioneer spacecraft. This angle of elevation measured from the All

show abstract

Pioneer Imaging Photopolarimeter Optical System

Cited by 47 publications

References 4 publications

Measurement of the cosmic optical background using the long range reconnaissance imager on New Horizons

Measurement of the cosmic optical background using the long range reconnaissance imager on New Horizons

Background Starlight observed from Pioneer 10

The Imaging Experiment on Pioneer 10

Contact Info

Product

Resources

About