GOME instrument simulation

The paper presents a detailed software simulation package for the Global Ozone Monitoring Experiment (GOME) instrument which will fly on ERS-2 in 1994. The GOME instrument is a nadir-viewing spectrometer designed for measurements of ozone and related trace gases such as NO, NO2, ClO, BrO, OClO, HCHO, SO2, O2/O4, and H2O. Examples are presented of input and output spectra and signal-to-noise calculations for normal viewing mode (nadir observations) and for sun and moon calibration mode. The GOME instrument simulating program can be used for a variety of purposes during instrument development, such as tests and calibrations, and tests of the so-called Zero-to-One processing step. The scheme could be adapted to other optical instruments.