Table 1 Components of IR2
From: Development and in-flight calibration of IR2: 2-μm camera onboard Japan’s Venus orbiter, Akatsuki
Component | Sub-component | T a | Weight (g) | Power consumption and remarks |
|---|---|---|---|---|
IR2-CMR | IR2-SNS | 1100 | 5.0 W (from IR-AE, when imaging) | |
(17-μm pitch 1M pix. PtSi) | 66 | IFOV = 0.20 mRad/FOV = \(12^\circ\) | ||
IR2-OPT (triplet lens) | 172 | \(f =\) 84.6 mm (170 K), F / 4 | ||
IR2-STR (structure) | – | |||
IR2-FWH (filter wheel) | 172 | 7.2 W (from IR-AE, when in motion) | ||
IR2-FLTR | 83 | Fixed short-wavelength pass filter | ||
IR2-ELC | 250 | A set of wire herness | ||
IR2-THRM | CP (Radiator plate) | 2500 | AlBeMet162 alloy metal | |
IR2-CMP (compressor) | 3500 | 50 W (from IR2-CDE) | ||
IR2-CHD (cold head) | 800 | |||
IR2-CDE | 3600 | 74.4 W (50 W to IR2-CMP) | ||
IR2-H | 2320 | Box-shape baffle | ||
IR-AE | 3300 | 40.4 W (when imaging) | ||
33.4 W (when FWH in motion) | ||||
IR-AE-WHN | 200 | A set of wire herness | ||
Total | 17,570 | 114.8 W (when imaging) | ||
107.8 W (when FWH in motion) |