000193564 001__ 193564
000193564 003__ CZ-ZdVUG
000193564 005__ 20220530123740.0
000193564 041__ $$aeng
000193564 040__ $$aABC039$$bcze
000193564 1001_ $$aKostelecký, Jan
000193564 24510 $$aGround track density considerations on the resolvability of gravity field harmonics in a repeat
000193564 300__ $$a15 stran
000193564 5203_ $$aOne of the limiting factors in the determination of global gravity field parameters is the spatial sampling, namely during phases when the satellite is in an orbit with few revolutions for each repeat cycle. This often happens when it is freely passing (drifting) through the atmosphere and encountering a fair number of such deficient repeat orbits. This research was triggered in 2004 by the significant but only temporary, 2?3 months long, decrease of the accuracy of monthly solutions for the gravity field variations derived from GRACE. The reason for the dip was the 61/4 resonance in the GRACE orbits in autumn 2004. At this resonance, the ground track density dramatically decreased and large (mainly longitude) gaps appeared in the data-coverage of theglobe. The problem of spatial sampling has been studied repeatedly and simple rules have been derived to limit the maximum order for unconstrained solutions (inversions) for the gravity field parameters or their variations from observatio
000193564 655_4 $$ačlánek v časopise
000193564 7001_ $$aBezděk, Aleš
000193564 7001_ $$aKlokočník, Jaroslav
000193564 7001_ $$aWagner, Carl A.
000193564 7730_ $$92015$$dSpolková republika Německo, 2015$$g56 (2015), 1146-1160, 2015.$$tAdvanced Space Research$$x0273-1177
000193564 85642 $$ahttps://www.rvvi.cz/riv?s=rozsirene-vyhledavani&ss=detail&n=0&h=RIV%2F00025615%3A_____%2F15%3A%230002176%21RIV16-MSM-00025615
000193564 910__ $$aABC039
000193564 980__ $$aclanky_vugtk
000193564 985__ $$akoseteleckyjan
000193564 985__ $$aanotace
000193564 985__ $$autvar21