This made me laugh while down in the rabbit hole of #HST #PhaseII documentation:
(“SPARS” is a contraction of the word “sparse.”)
https://hst-docs.stsci.edu/wfc3ihb/chapter-7-ir-imaging-with-wfc3/7-7-ir-exposure-and-readout#id-7.7IRExposureandReadout-7.7.3
#Astrodon