The Sentinel-3 Mission Performance Center

As part of the Sentinel-3 mission and in order to ensure the highest quality of products, ESA in cooperation with EUMETSAT has set up the Sentinel-3 Mission Performance Centre (S-3 MPC). This facility is part of the Payload Data Ground Segment (PDGS) and aims at controlling the quality of all generated products, from L0 to L2. The S-3 MPC is composed of a Coordinating Centre (CC), where the core infrastructure is hosted, which is in charge of the main routine activities (especially the quality control of data) and the overall service management. Expert Support Laboratories (ESLs) are involved in calibration and validation activities and provide specific assessment of the products (e.g., analysis of trends, ad hoc analysis of anomalies, etc.). The S-3 MPC interacts with the Processing Archiving Centres (PACs) and the Marine centre at EUMETSAT

Electronic transitions of cobalt carbide, CoC, near 750 nm: a good example of case (b(betaS)) hyperfine coupling

The laser induced fluorescence spectrum of jet-cooled CoC near 750 nm has been measured at high resolution following the reaction of laser-ablated cobalt atoms with methane. The X2Σ+ ground state of CoC is an unusually good example of Hund's case (bβS) coupling. Since Co has a nuclear spin I=7/2, each rotational level is split by the Fermi contact interaction into G=3 and G=4 components, where G=I+S; the splitting for N=0 is more than 0.5 cm-1. The X2Σ+ state begins to uncouple toward case (bβJ) with increasing rotation. Transitions to various 2Π excited states occur in the region 13 000-14 500 cm-1; the most prominent of these (for which high resolution spectra have been recorded) lie at 13 079 cm-1 ( 2Π3/2) and 13 343 cm-1 (2Π 1/2). The (bβS) coupling in the ground state produces some unexpected hyperfine intensity patterns, which have been studied in detail. A very low-lying 2Δi state, whose Ω=5/2 and Ω=3/2 components lie at 221 and 1173 cm-1, has been identified. Laser excitation of the 2Π3/2- 2Δ5/2 transition has been observed by monitoring the strong 2Π3/2-X2Σ+ emission, which has allowed the 2Δ5/2 state to be characterized at high resolution. A total of 879 rotational-hyperfine transitions between the various 2Π1/2, 2Π3/2, 2Δ5/2, and 2Σ+ states have been assigned and fitted. Matrix elements for a 2Σ+ state in case (b βS) coupling are listed. © 1995 American Institute of Physics.M. Barnes, A. J. Merer and G. F. Meth

PUZZLING DIATOMIC FEATURES SOLVED BY LASER-SPECTROSCOPY

Despite a resolution of 500 000, conventional (grating) spectroscopy failed in providing a satisfactory interpretation of the visible spectra of NbN and, above all, NbO. Laser spectroscopy techniques, from broad-band LIF up to sub-Doppler intermodulated LIF, were successfully used in order to understand these spectra. The main results are the observation of a case (a) coupling in the X4Σ- ground state of NbO and peculiar spin-uncoupling effects in the red system of NbN

Nature and significance of a Cambro-Ordovician high-K, calc-alkaline sub-volcanic suite: The late- to post-orogenic Motru Dyke Swarm (Southern Carpathians, Romania)

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Deep inside a Neoproterozoic intra-oceanic arc: growth, differentiation and exhumation of the Amalaoulaou complex (Gourma, Mali)

IF=3.497info:eu-repo/semantics/publishe