the accurate knowledge of the beam profiles is a prerequisite for the calibration of extended sources of centre point source observations. it is not possible to cover all filter/aperture combinations to assess the beam profile shape. based on statistics of the actual science observations the key wavelength/aperure combinations are: 11.5 micron/52 11.5 micron/180 we will scan the aperture in y and z using a point source (star) in order to determine the aperture profile for the two combinations history 15/12/97\tcreation database for 180 scan (rjl) \t must be executed on 20/01/98 because of fixed position angle .ott 9977 sec .tdt 11497 sec
Instrument
PHT03 , PHT17 , PHT18 , PHT19
Temporal Coverage
1998-01-20T15:52:10Z/1998-01-20T18:51:54Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the world's 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.
