Results 171 to 180 of about 4,818 (307)

Satellite Attitude Control Using Atmopheric Drag

, 2007
Attitude control is a requirement for most satellites. Many schemes have been devised over the years including control moment gyros, reaction wheels, spin stabilization and gravity gradient stabilization.
Guettler, David B.
core  

Impact of land surface characteristics on coastal compound flooding using a coupled hydrodynamic-hydraulic modelling framework. [PDF]

Sci Rep
Tiwari P, Rao AD, Pant V.
europepmc   +1 more source

A multimodel intercomparison study of variable‐resolution global models with grid refinement over the Arctic and Antarctic

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We document the protocol and first results from the first ever coordinated multimodel variable‐resolution experiment set with refinement over the polar regions. We find that the refinement generally yields model‐dependent effects. The most consistent improvement is an amelioration of the upper‐level cold bias in the polar regions that translates into ...
Lise Seland Graff, Dörthe Handorf, Raphael Köhler, Xavier Levine, René R. Wijngaard, Gareth J. Marshall, Alexey Yu. Karpechko, Ryan S. Williams, Priscilla A. Mooney   +8 more
wiley   +1 more source

A preliminary upper atmospheric density model derived from satellite drag density data Final report

, 1969
Satellite drag data for statistical upper atmosphere density fluctuation ...
Butler, J. H.
core  

Methods for tagging whale sharks: insights into performance and best practices with a focus on clamp attachments. [PDF]

Anim Biotelemetry
Womersley FC, Green S, Garcia-Baciero A, Conlon R, Jeffries AL, Waller MJ, Ratão SS, Queiroz N, Afonso P, Araujo G, Barnett A, Barry C, Berumen ML, Bloch F, Boldrocchi G, Braun CD, Caillouet R, Chapman C, Cochran JEM, de la Parra R, Diamant S, Dove ADM, Dunbabin M, Erdmann MV, Ferreira LC, Fitzpatrick R, Fontes J, Gleiss AC, Green JR, Griffin LP, Griffin CR, Hardenstine RS, Hassan A, Hearn AR, Hendon JM, Putra MIH, Hoffmayer E, Hoopes L, Hueter RE, John S, Levenson J, Lewis S, Macena BCL, Meekan MG, Miller IB, Norman B, Paulsen J, Perry C, Pierce SJ, Reynolds SD, Robinson DP, Rohner CA, Schmidt J, Setyawan E, Sianipar AB, Smith J, Thorrold SR, Thums M, Wilson R, Southall EJ, Sims DW.   +60 more
europepmc   +1 more source

Modulation of wind drag by tidal currents in an embayment

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Tidal currents modulate how wind energy enters the surface wave field by influencing both wave drag and wave generation. In Shark Bay, following currents reduce effective wave steepness and wind drag, and opposing currents enhance wave growth. Wind energy is partitioned between wave drag and the creation of new waves, explaining observed tidal ...
Stephen M. Thurgate, Michael V. W. Cuttler   +1 more
wiley   +1 more source

O-RAID: a satellite constellation architecture for ultra-resilient global data backup. [PDF]

Sci Rep
Meegama RGN.
europepmc   +1 more source

A framework to evaluate and identify development requirements for land‐surface models at km‐scale resolution: Application to a semi‐arid and mountainous region

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This article provides a first evaluation of land‐surface models at the km‐scale resolutions at which they are used in weather and Earth‐system models. At these resolutions, the lateral transfers of water that organize landscapes play an important role in predicting evaporation correctly. Riparian processes and human water management for irrigation need
Jan Polcher, Julie Collignan, Juan Pablo Sierra Perez, Gabriele Arduini, Sophie Bastin, Martin Best, Aaron Boone, Manel Bravo, Francesca Covella, Jasper M. C. Denissen, Cenlin He, Simon Munier, Marc Prange, Elena Shevliakova   +13 more
wiley   +1 more source

T-RAIM for Precise Orbit Determination in LEO-PNT. [PDF]

Sensors (Basel)
Gioia C, Menzione F, Piccolo A, Casotto S, Bardella M.   +4 more
europepmc   +1 more source

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source