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In general , the situation in terms of NICMOS and STIS observations is favorable , with good quality observations ongoing and some excellent science having been reported in press releases and in scientific meetings . General plan of campaign ; position and description of stations ; instruments ; determination of instrumental constantsl method of observation ; rating of chronometers ; reduction of observations ; reduction to sea level ; summary of results ; mean density of the earth from Pikes Peak pendulum observations ; observations with quarter-second pendulums and special pendulum observations ; description of quarter-second pendulums ; comparison or results with different pendulums ; experiments with knife-edges of different angles ; variation of period at different arcs ; use of penulum apparatus for investigating chronometers . The wind field is obtained through a retrieval process combining single-Doppler radar observations and a numerical model using a four-dimensional variational scheme . Two-dimensional maps of cloud heights such as those provided by the Multi-angle Imaging SpectroRadiometer offer an unprecedented opportunity for comparing simulated cloud fields against actual hurricane observations . Because uncertainties in representing hurricane cloud processes still exist , it is vital that model findings be evaluated against actual hurricane observations whenever possible . " This is important to our on-going Cassini studies because this association allows us to have some idea of what the aurora are doing throughout the mission from our continuous radio observations .