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Advanced Net Flux Radiometer for the Ice Giants
Space Science Reviews ( IF 10.3 ) Pub Date : 2020-01-23 , DOI: 10.1007/s11214-019-0630-x
S. Aslam , R. K. Achterberg , S. B. Calcutt , V. Cottini , N. J. Gorius , T. Hewagama , P. G. Irwin , C. A. Nixon , G. Quilligan , M. Roos-Serote , A. A. Simon , D. Tran , G. Villanueva

The design of an advanced Net Flux Radiometer (NFR), for inclusion as a payload on a future Ice Giants probe mission, is given. The Ice Giants NFR (IG-NFR) will measure the upward and downward radiation flux (hence net radiation flux), in seven spectral bands, spanning the range from solar to far infra-red wavelengths, each with a 5 ∘ $5^{\circ}$ Field-Of-View (FOV) and in five sequential view angles ( ± 80 ∘ $\pm 80^{\circ}$ , ± 45 ∘ $\pm 45^{\circ}$ , and 0 ∘ $0^{\circ}$ ) as a function of altitude. IG-NFR measurements within either Uranus or Neptune’s atmospheres, using dedicated spectral filter bands will help derive radiative heating and cooling profiles, and will significantly contribute to our understanding of the planet’s atmospheric heat balance and structure, tropospheric 3-D flow, and compositions and opacities of the cloud layers. The IG-NFR uses an array of non-imaging Winston cones integrated to a matched thermopile detector Focal Plane Assembly (FPA), with individual bandpass filters, housed in a diamond windowed vacuum micro-vessel. The FPA thermopile detector signals are read out in parallel mode, amplified and processed by a multi-channel digitizer application specific integrated circuit (MCD ASIC) under field programmable gate array (FPGA) control. The vacuum micro-vessel rotates providing chopping between FOV’s of upward and downward radiation fluxes. This unique design allows for small net flux measurements in the presence of large ambient fluxes and rapidly changing ambient temperatures during the probe descent to ≥ 10 ${\geq} 10$ bar pressure.

中文翻译:

用于冰巨人的先进净通量辐射计

给出了先进的净通量辐射计 (NFR) 的设计,作为未来冰巨人探测任务的有效载荷。Ice Giants NFR (IG-NFR) 将在七个光谱带中测量向上和向下的辐射通量(因此是净辐射通量),涵盖从太阳到远红外波长的范围,每个波段都有 5 ∘ $5^{\ circ}$ 视场 (FOV) 和五个连续视角(± 80 ∘ $\pm 80^{\circ}$ ,± 45 ∘ $\pm 45^{\circ}$ 和 0 ∘ $0 ^{\circ}$ ) 作为高度的函数。天王星或海王星大气中的 IG-NFR 测量,使用专用的光谱滤波器带将有助于推导出辐射加热和冷却剖面,并将显着有助于我们了解行星的大气热平衡和结构、对流层 3-D 流动和成分以及云层的不透明度。IG-NFR 使用集成到匹配热电堆探测器焦平面组件 (FPA) 的非成像 Winston 锥体阵列,以及单独的带通滤波器,安装在金刚石窗口真空微容器中。FPA 热电堆探测器信号在现场可编程门阵列 (FPGA) 控制下以并行模式读出、放大和处理,由多通道数字化仪专用集成电路 (MCD ASIC) 处理。真空微容器旋转,在向上和向下辐射通量的 FOV 之间提供斩波。这种独特的设计允许在存在大环境通量和在探头下降到 ≥ 10 ${\geq} 10 $ bar 压力期间环境温度快速变化的情况下进行小净通量测量。带有单独的带通滤波器,安装在金刚石窗口真空微容器中。FPA 热电堆探测器信号在现场可编程门阵列 (FPGA) 控制下以并行模式读出、放大和处理,由多通道数字化仪专用集成电路 (MCD ASIC) 处理。真空微容器旋转,在向上和向下辐射通量的 FOV 之间提供斩波。这种独特的设计允许在存在大环境通量和在探头下降到 ≥ 10 ${\geq} 10 $ bar 压力期间环境温度快速变化的情况下进行小净通量测量。带有单独的带通滤波器,安装在金刚石窗口真空微容器中。FPA 热电堆探测器信号在现场可编程门阵列 (FPGA) 控制下以并行模式读出、放大和处理,由多通道数字化仪专用集成电路 (MCD ASIC) 处理。真空微容器旋转,在向上和向下辐射通量的 FOV 之间提供斩波。这种独特的设计允许在存在大环境通量和在探头下降到 ≥ 10 ${\geq} 10 $ bar 压力期间环境温度快速变化的情况下进行小净通量测量。由多通道数字化仪专用集成电路 (MCD ASIC) 在现场可编程门阵列 (FPGA) 控制下放大和处理。真空微容器旋转,在向上和向下辐射通量的 FOV 之间提供斩波。这种独特的设计允许在存在大环境通量和在探头下降到 ≥ 10 ${\geq} 10 $ bar 压力期间环境温度快速变化的情况下进行小净通量测量。由多通道数字化仪专用集成电路 (MCD ASIC) 在现场可编程门阵列 (FPGA) 控制下放大和处理。真空微容器旋转,在向上和向下辐射通量的 FOV 之间提供斩波。这种独特的设计允许在存在大环境通量和在探头下降到 ≥ 10 ${\geq} 10 $ bar 压力期间环境温度快速变化的情况下进行小净通量测量。
更新日期:2020-01-23
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