GOME Timeline Builder & Viewer - Ensuring On-Board Control Procedure Validity and Observability

Le résumé fourni par la source

The GOME-2 instrument onboard EUMETSAT’s Metop-A Spacecraft is a spectrometer collecting light from the Sun illuminated atmosphere. In order to make good quality trace gas measurements, GOME-2 must be continually adapted throughout the sun-synchronous, near polar orbit to match current lighting conditions. This is achieved using Timelines which are essentially linear On-Board Control Procedures (OBCPs) as defined by ECSS PUS Service 18 1 . A Timeline is triggered to execute once per Metop orbit and contains 20 macrocommands on average, each with up to 25 low level directives embedded. To date, generation of scientific products from the GOME-2 instrument has required over 17,000 timeline activations and development of over 200 distinct timelines. In order to facilitate such operations, two tools have been developed in-house at Eumetsat;

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