Title: review.ppt
1Cassini CIRS Heritage
CLARREO Infrared Instrument Meeting4-6 March 2009
Don Jennings
2Nimbus 4 IRIS
3Voyager IRIS
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5It Takes a Village
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7CIRS Instrument Description
Telescope Diameter(cm) 50.8 Interferometers FAR
-IR MID-IR Type Polarizing Michelson Spectral
range(cm-1) 10 - 650 600 -1450 Spectral
range(microns) 15.4 - 1000 6.9 -16.6 Spectral
resolution(cm-1) 0.5 to 20 0.5 to
20 Integration time(sec) 2 to 50 2 to
50 FOCAL PLANES FP1 FP3 FP4 Spectral
range(cm-1) 10 - 650 600 - 1125 1100 -
1450 Detectors Thermopile PC HgCdTe PV
HgCdTe Pixels 2 1 x 10 1 X 10 Pixel
FOV(mrad) 3.9 0.273 0.273 Peak D(cm hz1/2
W-1) 4 x 109 2 x 1010 5 x 1011 Data Telemetry
Rate(kbs) 2, 4 Instrument Temperature(K) 170 Foc
al Planes 3 4 Temperature(K) 75 - 90
8Optical Layout
9CIRS Mechanical Layout with Raytrace
10CIRS Conceptual Layout
11CIRS Fields of Views
12CIRS FP1 spectrum at 0.5 cm-1 resolution
C4H2
C2N2
C4H2 C3H4
CH4
HC3N
C3H4
?
CO HCN
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14Titan in the Mid-Infrared (FP4)
15CIRS Engineering Model
16CIRS Telescope
17CIRS Reference Interferometer
18CIRS Scan Mechanism
19SPIRE Flexure Carriage
20CIRS Retroreflectors
21CIRS Mid-IR and Far-IRInterferometers
22Far-IR Beamsplitter Cold Adjustment on EM
23CIRS Mid-IR Far-IR Focal Planes
24CIRS Mid-IR Focal Plane
25CIRS Electronics
26DLaTGS pyroelectric detectors
Data from Selex, Southhampton UK.
27Nimbus, Mariner, Voyager, Cassini
Spectral ?? Scan FOV Range
(apod) Time ______________________________
_________________________________ Nimbus 3
IRIS 400-2000 cm-1 5 cm-1 10 sec 8
deg Nimbus 4 IRIS 400-1600 2.8 16
5 Mariner 9 IRIS 200-2000 2.4 18.2
4.4 Voyager IRIS 200-4000 4.3 45.6
0.25 Cassini CIRS 10-600-1500 0.5 50
0.02, 0.2
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