Effect of the Laser Ranging Instrument (LRI) on gravity field recovery

This challenge will investigate the use of the LRI data, in particular ranging and attitude measurements, in the context of different gravity field recovery methods. The results can then be analysed to quantify the improvements obtained from the use of the LRI data, and to assess possible problems or restrictions associated with its use. This challenge builds on challenge 1, using a similar simulation environment and similarly simplified Earth models, but adds the LRI instrument noise model to produce an augmented data set. This challenge will give the community the opportunity to develop their algorithms to deal with data coming from the LRI which will fly on GRACE Follow-On and will also serve to compare the microwave and LRI ranging data under controlled conditions.