we propose to observe 5 positions as listed in tab. 1. positions 1, 2, and 3 are repeated observations of a dark field on the sky when the field is at 68, 90, and 115 deg from the sun, respectively. pos. 2, 4, and 5 are located along the great circle at 90 deg from the sun. the measurements will outline the large scale dependency of the zl spectral shape on both solar elongation (pos. 1,2,3) and ecliptic latitude (pos. 2,4,5). comparison of pos. 1 with the spectrum taken in may 1996 will show the repeatibility of the spectrum 9 months later. all sky positions are carefully pre-selected dark fields where cirrus contamination is negligible.
Instrument
PHT40
Temporal Coverage
1996-12-15T17:37:14Z/1997-01-30T13:10:23Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, Ulrich Klaas, 2024, 'PHT-S Observations of Zodiacal Light as Function of Solar Aspect', 1.0, European Space Agency, https://doi.org/10.5270/esa-t70guq1
