Removing Artifacts in the Calibration of Cassini CIRS Spectra of Saturn and Titan
Abstract
The Composite Infrared Spectrometer (CIRS) on the NASA Cassini spacecraft is a dual far- and mid-IR Fourier transform spectrometer (FTS) which covers the spectral range 10 - 1400 cm-1 with an adjustable spectral resolution of 7.8 - 0.27 cm-1 unapodized [1, 2]. The CIRS detectors comprise three separate focal planes totalling 21 individual pixels: A redundant pair of far-IR thermopiles (Focal Plane 1: 10 - 650 cm-1), a 1 x 10 mid-IR HgCdTe PC array (Focal Plane 3: 605 - 1119 cm-1), and a 1 x 10 mid-IR HgCdTe PV array (Focal Plane 4: 1114 - 1429 cm-1). CIRS is a dual-temperature FTS, since the FP3 and FP4 detector arrays are operated at ~ 76K, whereas the rest of CIRS, including the FP1 thermopiles, is maintained at ~170.0K to within ±0.1K.
- Publication:
-
EPSC-DPS Joint Meeting 2011
- Pub Date:
- October 2011
- Bibcode:
- 2011epsc.conf...27C