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

This data set contains Raw 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.