New Horizons Linear Etalon Imaging Spectral Array Kuiper Belt Extended Mission 1 (KEM1) Encounter Calibrated Data, Version 1.0

This data set contains calibrated data taken by the
New Horizons Linear Etalon Imaging Spectral Array instrument during
the KEM1 ENCOUNTER mission phase.

LEISA is an infrared imaging spectrometer. The two-dimensional (2-D)
detector is a 256x256-pixel array. Spectral separation is done with a
wedged optical etalon filter, which comprises high (2.1-2.25 micron) and
low (1.25-2.5 micron) spectral resolution segments. The optics and
filter arrangement configure one detector dimension as spatial at
constant wavelength and the other dimension as both spectral and
spatial. Multiple frames (images) may be taken in sequence, while
scanning the Field Of View (FOV) in the spatial+spectral dimension, such
that each pixel-sized piece of the observed target will be observed at
all wavelengths across multiple frames. The resulting data products in
this data set are three-dimensional image cubes, which dimensions are
spatial, spatial+spectral, and spatial+time and which shall be convolved
into spatial, spatial, and spectral image cubes at a later date.

KEM1 ENCOUNTER contains two epochs of observations. The Vega data
(20180820_039709) is a test of a long integration time using Vega
as a source. The ASTEROID 486958 Arrokoth (2014 MU69) data
(20181231_040854) is the first encounter operations sequence.

Labels were redesigned during migration using the .FIT header and PDS3 .LBL
files, but the data files are unchanged from their PDS3 version.

本数据集收录了在新地平线号线性棱镜成像光谱仪（LEISA）在KEM1遭遇任务阶段所采集的校准数据。LEISA为一款红外成像光谱仪，其二维（2-D）探测器为256x256像素阵列。光谱分离通过楔形光学棱镜滤波器实现，该滤波器包含高分辨率（2.1-2.25微米）和低分辨率（1.25-2.5微米）光谱段。光学和滤波器配置将一个探测器维度设置为在恒定波长下的空间维度，而另一个维度则同时为光谱和空间维度。在扫描空间+光谱维度视场（FOV）的同时，可以按顺序采集多帧（图像），确保观察目标每个像素大小的部分在多个帧中均能在所有波长下被观测到。该数据集产生的数据产品为三维图像立方体，其维度分别为空间、空间+光谱和空间+时间，这些立方体将在后期处理中被卷积为空间、空间和光谱图像立方体。KEM1遭遇任务包含两个观测时期。Vega数据（20180820_039709）是对使用Vega作为源进行长时间积分的测试。小行星486958阿罗科斯（2014 MU69）数据（20181231_040854）是首次遭遇操作序列的数据。在数据迁移过程中，标签被重新设计，使用了.FIT头文件和PDS3 .LBL文件，但数据文件与其PDS3版本保持不变。