a region with low galactic and extragalactic emission is observed near the ecliptic plane. all apertures that have been used by observers during routine observations with a given filter are measured, to obtain the effective area projected on the sky. the results will be compared with the known geometric areas of the field-apertures.
Instrument
PHT04
Temporal Coverage
1997-07-16T10:44:09Z/1997-07-16T11:42:01Z
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, '5.2.5.12 Linearity of the Aperture Photometer comma P1-Pilot Measurement', 1.0, European Space Agency, https://doi.org/10.5270/esa-lfnv074
