High-Resolution Dynamics Limb Sounder (HIRDLS) for the Earth Observing System
High-Resolution Dynamics Limb Sounder (HIRDLS) for the Earth Observing System
复制标题
用于地球观测系统的高分辨率动态临肢探测器 (HIRDLS)
DOI：
--
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Wayne P. Rudolph
中科院分区：
文献类型：
--
作者：
J. Gille;J. Barnett;W. Mankin;Brian R. Johnson;M. Dials;J. Whitney;D. Woodard;P. Arter;Wayne P. Rudolph
HIRDLS 仪器的设计目的是获取数据，以解决与中层大气及其在全球变化中的作用相关的关键问题。我们简要说明实验的科学目标，然后描述对仪器的要求。其中包括获得 4 度纬度和经度分辨率以及 1 公里垂直分辨率的测量的能力，在无云时探测对流层上层的能力，以及测量辐射剖面的能力，以推断 5 年或更长时间的温度和不同化学寿命的多种痕量物质的浓度，以及位势高度场的梯度。 HIRDLS 仪器是一款多通道红外肢体扫描仪，显着扩展了 LIMS 和 ISAMS 等早期仪器的测量能力。进步包括使用两轴扫描仪允许在多个方位角进行肢体扫描、窄视场结合过采样、数字滤波和低噪声以增强垂直分辨率、使用更多通道来获取更大高度范围内的数据以及使用陀螺仪来确定光具座的运动。描述了完成此操作的方法。最苛刻的要求是辐射精度和精确度，以及精确的指向知识（存在振动的情况下）。介绍了权衡研究的结果，并描述了当前的概念设计。
The HIRDLS instrument is being designed to obtain data to address critical questions related to the middle atmosphere and its role in global change. We briefly state the scientific objectives of the experiment, and then describe the requirements placed on the instrument. These include the ability to obtain measurements with 4 degree(s)latitudinal and longitudinal resolution, and 1 km vertical resolution, the ability to sound down into the upper troposphere when clouds are absent, and the ability to measure radiance profiles in order to infer temperature and the concentrations of a number of trace species of different chemical lifetimes, along with the gradients of the geopotential height fields, for 5 or more years. The HIRDLS instrument is a multichannel infrared limb scanner that significantly extends the measurement capabilities of earlier instruments such as LIMS and ISAMS. Advances include the use of a two-axis scanner to allow limb scans at multiple azimuths, narrow fields of view coupled with over-sampling, digital filtering and low noise to enhance vertical resolution, the use of larger numbers of channels to acquire data over a larger range of altitudes and the use of a gyroscope to determine motions of the optical bench. The ways in which this is done are described. The most demanding requirements are for radiometric accuracy and precision, and for precise pointing knowledge (in the presence of vibration). The results of trade-off studies are presented, and the current conceptual design is described.