New Horizons Linear Etalon Imaging Spectral Array (LEISA) KEM1 Cruise Calibrated Data, Version 1.0

This collection contains a set of calibrated images in .FIT format for the
New Horizons Linear Etalon Imaging Spectral Array (LEISA) instrument during
the KEM1 CRUISE 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 Cruise contains two epochs of observations.
All of the data were taken for testing or calibration. The Arcturus
data were taken for radiometric calibration (20170921_036833).
The Vega data (20171103_037203) includes a test of a long integration
time using Vega as a source. These data were migrated from the PDS3
dataset: NH-X-LEISA-3-KEMCRUISE1-V2.0.

In some data sequences, the target star appears to bounce back and
forth. This effect happens due to spacecraft thruster firings.

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