The Hubble Space Telescope has recently emerged as the first telescope
to detect molecular signatures in an exoplanet via infrared spectroscopy. Molecular
spectroscopy of exoplanets is demanding and requires an accurate determination and
removal of the instrument systematics. Here we report on our effort to extract accurate
exoplanet spectra from NICMOS spectrophotometry. We developed a standardized
and highly automated pipeline to remove instrument systematics based on our previous
results. We tested the pipeline and find excellent agreement with observation specific
implementations. The process of decorrelating instrument parameters from the measured
time series is well understood, stable and guarantees reproducible results.