ESA GNC Conference Papers Repository

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136 search results:
Closed-loop validation of a free-floating guidance scheme for a space robot
Salzburg 2017

B.D. Dellandrea, A. Perez Gonzalez, V. Dubanchet

A new experimental facility for testing of vision-based GNC algorithms for planetary landing
Salzburg 2017

P. Lunghi, M. Ciarambino, M. Marcon, M. Lavagna

Electromagnetic position and attitude control for pacman experiment
Salzburg 2017

M. Duzzi, M. Mazzucato, A. Cenedese, A. Francesconi

Star tracker catalogue tuning on ESA's billion star surveyor GAIA mission
Salzburg 2017

J.L. Marie, J. Kolmas, D.J. Milligan

Prisma AOCS subsystem design with high agility and pointing performance for EO missions
Salzburg 2017

G. Curti, E. Paolini, F. Longo, G. Varacalli, R. Formaro

Smart reaction wheels- in-orbit experiences and lessons learned from tet-1 and biros
Salzburg 2017

S. Stoltz, C. Raschke, T. Terzibaschian, W. Halle, S. Eckert, S. Scheiding

The study for improving accuracy of star tracker
Salzburg 2017

T. Sekiguchi, S. Shimizu, G. Ono, K. Ichida, T. Kamiya, Y. Torikai

Precision ADCS of cubesats by on-orbit determination of the dynamic magnetic moment
Salzburg 2017

A. Lassakeur, C. Underwood

Technology consolidation of Bradford reaction wheels
Salzburg 2017

R. Antunes Ferreira, P. van Put, P. Le

Sizing and steering CMG arrays for agile spacecraft
Salzburg 2017

B.J. Hamilton

Design and testing of an active payload/launcher isolation system based on positive force feedback
Salzburg 2017

C.U. Jetzschmann, H. Strauch, R. Buchwald, S. Knief

PEET v1.0: the state-of-the-art pointing and performance error engineering tool for space missions
Salzburg 2017

M. Hirth, H. Su, T. Ott, M. Casasco, G. Ortega

On-board real-time gyro calibration for fast high-precision repointing spacecraft: challenges and solutions
Salzburg 2017

S. Winkler, F. Schiemenz

Autonomous model predictive control for hybrid rendezvous under eclipses constraints
Salzburg 2017

F. Capolupo, A. Falcoz

Influence of radiation effects on a COTS near range distance multi-sensor system
Salzburg 2017

M. Grimm, B. Voss, D. M

Coordinated orbit and attitude control of a satellite formation in a satellite simulator testbed
Salzburg 2017

S. Wehrmann, M. Schlotterer

Beacons for improving lunar landing navigation
Salzburg 2017

S. Theil

3D model-based relative pose estimation for rendezvous and docking using edge features
Salzburg 2017

M.S.G. Gansmann, O.M. Mongrard, F.A. Ankersen

Linear modeling and robust control of a flexible space manipulator
Salzburg 2017

B.D.D. Dellandrea, A.P.G. Perez Gonzalez, V.D. Dubanchet

Guidance and control of magnetic Space Tug
Salzburg 2017

D.A. Alazard, E.F. Fabacher, S.L.D. Lizi-Destrez, F.A. Ankersen, A.P. Profizi

Architectural elements of hybrid navigation systems for future space transportation
Salzburg 2017

F. Trigo, S. Theil

Design of a new real-time steering law for control moment gyro clusters
Salzburg 2017

H.E. Evain, M. Rognant, D. Alazard, J. Mignot

Robust control design in a non-smooth h-infinity/mu setting for spacecraft microvibration attenuation
Salzburg 2017

V.P. Preda, J.C. Cieslak, D.H. Henry, S.B. Bennani, A.F. Falcoz

Dynamic modeling and analysis of micro-vibration jitter of a spacecraft with solar arrays drive mechanism for high accuracy pointing control purposes
Salzburg 2017

F. Sanfedino, D. Alazard, V. Budinger, A. Falcoz, F. Boquet

Revisiting the SGR-GEO on Giove-A for GPS satellite antenna pattern mapping
Salzburg 2017

M.J.U. Unwin, S.M.D. Duncan, A.H. Hyslop, S.K. Kowaltschek

In-flight guidance, navigation, and control performance results for the GOES-16 spacecraft
Salzburg 2017

J. Chapel, D. Stancliffe, T. Bevacqua, S. Winkler, B. Clapp, T. Rood, D. Freesland, A. Reth, D. Early, T. Walsh, A. Krimchansky

GPS receiver on-orbit performance for the GOES-R spacecraft
Salzburg 2017

S. Winkler, G. Ramsey, C. Frey, J. Chapel, D. Chu, D. Freesland, A. Krimchansky, M. Concha

The AVANTI experiment: flight results
Salzburg 2017

G. Gaias, J.S. Ardaens, C. Schultz

Exomars 2016, trace gas orbiter GNC design and in flight GNC behaviour
Salzburg 2017

H.R. Renault, N.S. Sergent, M.C. Chevallier, N.K. Kutrowski, A.B. Bacchetta, D.T. Temperanza

Drag-free performance of the ST7 disturbance reduction system flight experiment on the LISA pathfinder
Salzburg 2017

P.G.M. Maghami, J.o.D. O'Donnell, Jr., O.H. Hsu, J.Z. Ziemer, C.E.D. Dunn

In-orbit performance of the LiSA pathfinder drag free and attitude control system
Salzburg 2017

A.S. Schleicher, R.S. Schubert, T.Z. Ziegler, U.J. Johann, W.F. Fichter, J.G. Grzymisch

Fluid dynamic in space experiment
Salzburg 2017

R.P. Pierre

In-orbit earth observation experiences of GHGsat-D
Salzburg 2017

N.S.I. Ibrahim, N.R. Roth, K.S. Sarda, D.D.K. Kekez, L.B. Bradbury, R.E.Z. dr. Zee

Rosetta star trackers in the comet dust : understanding and improving the flight behavior through on-ground testing of the STR EQM with the Airbus DS microSTOS optical stimulator
Salzburg 2017

P.R. Regnier, P.V. Vidal, M.J. Janvier, S.L. Lodiot, J.M.P.B. Pellon-Bailon

Cryosat-2 Terma star trackers, in-orbit improvements
Salzburg 2017

P. Davidsen, P. Bohn, C. gjevert Petersen

First in-orbit results from JASON3, last satellite from the Proteus family
Salzburg 2017

S.D. Djalal, S.B. Berrivin, B.R. Raffier, D.B. Brethé

Solar radiation pressure torque evolution as seen by ESA's ultra-precise GAIA mission
Salzburg 2017

J.L.M. Marie, D.J.M. Milligan

SGEO AOCS in-flight results
Salzburg 2017

C.C. Chasset, N.N. Neumann, T.N. Nicholls, E.G. Gröndahl, R.V. Viroli

Lisa PathFinder (LPF) in orbit experience: LEOP and On-Station operations
Salzburg 2017

A.P. Povoleri, V.P. Pereira, M.W. Watt

Mechanism disturbance analysis. an approach to simplified rigid multi-body dynamics
Salzburg 2017

C.H.G. Hervas Garcia, I.C. Cantiello, G.M. Monroig, E.P. Palombo

AOCS & image navigation and registration for earth observation from GEO
Salzburg 2017

L. Carreira, D. Esteves, J. Seabra, F. Camara, L. Guillaume, K. Lagadec

PointingSat - high precision pointing error analysis with ESA PEET v1.0
Salzburg 2017

T. Ott, M. Hirth, M. Casasco, D. Gedon, S. Görries, A. Ponche

AOCS solution to Euclid's highly stringent pointing and stability performance requirements
Salzburg 2017

R.S.M. Sanchez Maestro, A.A.D. Agenjo Diaz, F.C. Cacciatore, C. Ardura, V. Gomez, M.O. Oort, M.S. Saponara, G.S.C. Saavedra Criado

The fine guidance sensor for the Euclid european observatory
Salzburg 2017

F.B. Boldrini, P. Fidanzati, E. Monnini, D. Procopio

Very high accuracy attitude determination for LOS steering
Salzburg 2017

M. Giurato, F. Haydar, M. Lovera, G. Sechi

High accuracy line-of-sight stabilization for geo high-resolution earth observation missions with onboard optical correlator: imaging performances estimation
Salzburg 2017

V. Chernykh, K. Janschek, B. Harnisch

GOES-R active vibration damping controller design, implementation, and on-orbit performance
Salzburg 2017

B. Clapp, H. Weigl, N. Goodzeit, D. Carter, T. Rood

GNSS-based safety for launchers
Salzburg 2017

M.S. Sachot, F.H. Hennart

Effectiveness and limitation of IMU-GPS integrated navigation and gps attitude determination for launch vehicle guidance
Salzburg 2017

S.M. Matsumoto, M.K. Komatsu, E.S. Shimane, Y.K. Kobayashi, S.Y. Yamazaki

Forces-RTP: a tool for on-board real-time autonomous trajectory planning
Salzburg 2017

L. Jerez, S. Merkli, S. Bennani, H. Strauch

EAGLE - environment for autonomous GNC landing experiments
Salzburg 2017

M.D. Dumke, S.T. Theil

Guidance navigation and control solution for a reentry vehicle hosting experiments with the highest micro-gravity level
Salzburg 2017

M.V. Vitelli, G.D. Dodelin, J.M. Müller, F.P. Plachetta, E.T. Trehet, J.W. Wynn

Space Rider thruster configuration and control strategy optimisation
Salzburg 2017

L.T.C. Tarabini Castellani, R.H. Haya, A.A. Ayuso

Flight performance of the IXV re-entry guidance, control & DRS triggering
Salzburg 2017

M.L. Kerr, J.A. Ospina, G. de Zaiacomo, V. Marco, R. Haya

Dispersion analysis and autonomous image-based navigation for an approach to small bodies
Salzburg 2017

N.S.C.H. Hormigo, D. Esteves, L. Carreira, F. Camara

Altimeter for planetary lander
Salzburg 2017

C.P. Costa Pinto, A.M. Marques, O.D.M. Dubois-Matra

Real-time implementation of the hybrid camera-LiDAR hazard detection and avoidance software in space qualified hardware
Salzburg 2017

F. Camara, J. Canilho, M. Rodrigues, J. Oliveira, C. Posse, O. Dubois-Matra

Landmark based pose estimation for autonomous inertial hovering around small solar system bodies
Salzburg 2017

S.D. Delchambre, T.Z. Ziegler, U.J. Johann, A.F. Falke, K.J. Janschek

Simulating planetary approach and landing to test and verify autonomous navigation and guidance systems
Salzburg 2017

I.M. Martin, M.N. Dunstan, S.M. Parkes, M. Sanchez-Gestido, G. Ortega

Design and validation of a GNC system for missions to asteroids - the AIM scenario
Salzburg 2017

A.P. Pellacani, P. Kicman, M. Suatoni, M. Casasco, J. Gil, I. Carnelli

Benchmark of sampling based motion planning techniques for small body proximity operations
Salzburg 2017

F.C. Capolupo, T.S. Simeon, J.C.B. Berges

Maneuver strategy for OSIRIS-REx proximity operations
Salzburg 2017

D.R.W. Wibben, K.E.W. Williams, J.V.M. Mcadams, P.G.A. Antreasian, J.M.L. Leonard, M.C.M. Moreau

Results of new guidance and control strategies for landing on small bodies
Salzburg 2017

E.J. Joffre, M.Z. Zamaro, N.S. Silva, A.M. Marcos, P.S. Simplicio, B.R. Richardson

GNC design for pinpoint landing on Phobos
Salzburg 2017

A.B.S. Bidaux-Sokolowski, J.L. Lisowski, P.K. Kicman, O.D.M. Dubois-Matra, T.V. Voirin

GNC design challenges for variable flight configuration on the Bepicolombo mission to Mercury
Salzburg 2017

P.Espeillac, T. Strandberg, M. Casasco, C. Steiger, A. Altay, E. Montagnon

Station keeping techniques for near rectilinear orbits in the earth-moon system
Salzburg 2017

L.B. Bucci, M.L. Lavagna, R. Jehn

Hybrid optical navigation by crater detection for lunar pin-point landing: trajectories from helicopter flight tests
Salzburg 2017

B. Maass, G.F. Trigo, H. Krüger, S. Theil

Convex guidance, navigation, and control for pin-point lunar landing
Salzburg 2017

K. de Ridder , E. Mooij

Achieving lunar landing hazard detection and avoidance in the context of PILOT
Salzburg 2017

D. Neveu, J.F. Hamel, G. Mercier, A. Nagaty, K. Hornbostel, D. de Rosa

Optimal real-time force rendering for on-orbit structures assembly
Salzburg 2017

C.A.P. Pascucci, M.S. Szmuk, B.A. Acikmese

Cubetug: a tethered space tug concept demonstration for active debris removal missions
Salzburg 2017

L.O. Olivieri, R.M. Mantellato, A.F. Francesconi

Development and implementation of a microsatellite to in-orbit-validation mission: the µhetsat project
Salzburg 2017

V.F. Fabbri, A.A. Avanzi, D.F.L. de Filippis, M.N. Melega

Neoshield-2: design and end-to-end validation of an autonomous closed-loop GNC system for asteroid kinetic impactor missions
Salzburg 2017

M.C. Chapuy, N.D. Despré, P.H. Hyounet, F.C. Capolupo, R.B. Brochard

High accuracy pointing attitude determination estimator system of the future infrared astronomy satellite SWARM interferometer
Salzburg 2017

D.B. Bhatia, U.B. Bestmann, P.H. Hecker

AOCS design for the Athena X-ray telescope: challenges and solutions
Salzburg 2017

T. Ott, A. Schleicher, S. Winkler, S. Arefin, K. Kajak, S. Görries

The next generation gravity mission: challenges and consolidation of the system and AOCS concepts
Salzburg 2017

S.D. Dionisio, A. Anselmi1, S. Cesare, L. Massotti, P. Silvestrin

GNC for tethered debris removal experiments in the international space station
Salzburg 2017

T.V. Peters, J.F. Briz Valero, V. Lappas, R. Biesbroek

Vision-based navigation experiment onboard the removedebris mission
Salzburg 2017

T.C. Chabot, K.K. Kanani, A.P. Pollini, F.C. Chaumette, E.M. Marchand, J.F. Forshaw

End-to-end simulation and verification of GNC and robotic systems considering both space segment and ground segment
Salzburg 2017

H.B. Benninghoff, F.R. Rems, B.B. Brunner, M.S. Stelzer, P.S. Schmidt, R.K. Krenn, R. Faller, M. Gnat

Lessons-learned from on-ground testing of image-based non-cooperative rendezvous navigation with visible-spectrum and thermal infrared cameras
Salzburg 2017

F. Schnitzer, A.S. Sonnenburg, K.J. Janschek, M.S.G. Sanchez Gestido

Using infrared-based relative navigation for active debris removal
Salzburg 2017

O. Yilmaz, N. Aouf, L. Majewski, M. Sanchez-Gestido, G. Ortega

Wave based control analysis and experimental validation for reliable space transportation applications
Salzburg 2017

B.A. Bellanca, V.P. Pesce, P. Lunghi, M.L. phd. Lavagna

Combined control for active debris removal using a satellite equipped with a robot arm
Salzburg 2017

J. Reiner, J.G. Fernandez, G. Ortega

Coupled control of chaser platform and robot arm for the e.deorbit mission
Salzburg 2017

J.T. Telaar, S.E. Estable, M.S. de Stefano, W.R. Rackl, R.L. Lampariello, F.A. Ankersen

Galileo - work order 1 finished and deployed
Salzburg 2017

M.B.E. Berlin, L.D.R. de Rocco, J.R.N. Rodriguez-Navarro

AS250 avionics: from SPOT-6 to Biomass, a success story
Salzburg 2017

X.L. Langevin, C.B. Bonneau

Meteosat Third Generation: challenges at the end of the design phase
Salzburg 2017

M.B. Battilana, L.A. Ascani, J.H. Habets, M.J. Jacquemard, G.R. Rigot

Gyroless AOCS for observations and science applications on LEO
Salzburg 2017

M. Alvarado, J.L. Beaupellet, P. Samson, D. Brethé, G. Chamberland, A. Dumortier

LEO satellite attitude guidance & control design for widely-varying solar beta angles
Salzburg 2017

L.O. Ottone, J.B.F. Frappe, A.H. Hyslop

AOCS design and AOCS SW development of two SmallGEO based satellites: the all chemical propulsion European Data Relay Satellite EDRS-C and the all-electric propulsion satellite platform Electra
Salzburg 2017

T.N. Nicholls, P.B. Bodin, N.O. Oriol, K.R.E. Rynninger Eriksson, N.A. Ata, A.S. Schönfeld

AOCS design for solar orbiter, a mission to 0.28 a.u. from the sun
Salzburg 2017

M.C. Campana, I.C. Cantiello, P.C. Chapman, G.M. Monroig, S.S. Strandmoe

GOES-16 on-orbit dual isolation performance characterization results
Salzburg 2017

D. Carter, B. Clapp, D. Early, D. Freesland, J. Chapel, R. Bailey, A. Krimchansky

Eurostar E3000: ADCS evolutions for full electric satellites
Salzburg 2017

M.F. Fondeville, M.G. Guyot, I.L. Laine, J.F. Fischer, D.M. Mignon, S.K. Kowaltschek

Microscope mission: drag-free and attitude control system expertise activities toward the scientific team
Salzburg 2017

S.D. Delavault, P.P. Prieur, T.L. Liénart, A.R. Robert, P.Y.G. Guidotti

AOCS for iridium next mega constellation satellites
Salzburg 2017

D. Forestier, E. Pierre, M. Alvarado

SGEO AOCS verification and validation
Salzburg 2017

N.N. Neumann, R.V. Viroli, C.C.H. Chasset

The Euclid AOCS tasks at system level
Salzburg 2017

M.S. Saponara, A.B. Bosco, A.B. Bacchetta, J.S.L. Llorente, M.O. Oort, G.S.C. Saavedra Criado

JUICE attitude and orbit control system : an optimal combination of Airbus DS interplanetary AOCS heritage and efficient GNC innovations
Salzburg 2017

P.R. Regnier, A.G. Guignard, D.G. Gherardi

Technologies for control and cooperation of multi-robot autonomous system in defence and space applications
Salzburg 2017

M.D. Detratti

Sun avoidance implementation on safe modes for LEO satellites
Salzburg 2017

A. Dumortier, G. Chamberland, M. Alvarado

Orbit determination strategy and simulation performance for OSIRIS-REx proximity operations
Salzburg 2017

M. Leonard, P.G. Antreasian, C.D. Jackman, B. Page, D.R. Wibben, M.C. Moreau

Avoiding rigor mortis - Euclid attitude and orbit control subsystem failure detection isolation and recovery
Salzburg 2017

J.A. Meijer, J.F. Bos, G. Saavedra Criado, G. Chlewicki, A. Agenjo

GNC autonomy and FDIR challenges for the Bepicolombo mission to Mercury
Salzburg 2017

C. Steiger, A. Pasetti, E. Espeillac, T. Strandberg, M.Casasco, A. Altay, E.M. Montagnon

Inverse simulation as a tool for fault detection & isolation in planetary rovers
Salzburg 2017

M.L.I. Ireland, R.M. Mackenzie, T.F. Flessa, K.J.W. Worrall, D.G.T. Thomson, E.W.M. Mcgookin

Beyond l-inf reaction wheel commanding: increased on-board autonomy through enhanced wheel failure handling
Salzburg 2017

S.W. Winkler, M.E. Evers, B.K. Kraft

Absolute navigation for a network of nanosatellites in lunar orbit
Salzburg 2017

M.D. Delpech, A.L. Laurens

Hardware acceleration and performance assessment of image processing algorithms applicable to future ESA missions
Salzburg 2017

N.S.C.H. Hormigo, M. Rodrigues, L. Carreira, F. Camara

Vision-based pose estimation and relative navigation around uncooperative space objects
Salzburg 2017

V.P. Pesce, M.L. Lavagna, S. Sarno, R.O. Opromolla, M.G. Grassi

Robust model based tracking through fusion of optical flow and edge tracking techniques
Salzburg 2017

D. Mora, G. Prisco, M. Avilés, P. Colmenarejo, J. Gil

Dual technologies to mature vision based navigation: the example of space rendezvous and air to air refuelling
Salzburg 2017

K.K. Kanani, C. Robin, A. Masson, R. Brochard, P. Duteis, R. Delage

Rendezvous GNC-system for autonomous orbital servicing of uncooperative targets
Salzburg 2017

F.R. Rems, E.R. Risse, H.B. Benninghoff

A minimal state augmentation algorithm for vision-based navigation without using mapped landmarks
Salzburg 2017

M. San Martin, D.S.B. Bayard, D.T.C. Conway, M.M. Mandic, E.S.B. Bailey

Vision based navigation for JUICE
Salzburg 2017

X.M.J. Manuel Juanpere, G.J. Jonniaux, B.P. Polle, D.G. Gherardi

Evaluation results on HAS3, next generation cmos image sensor for AOCS star tracking
Salzburg 2017

I.T. Thanasopoulos

Faint Star - an intelligent single-chip sensor head for STRs - prototype results
Salzburg 2017

W. Ogiers, K. Ruythooren, K. van Wichelen, M. Dendoncker, S. Kowaltschek

On the use of plenoptic imaging technology for 3D vision based relative navigation in space
Salzburg 2017

A. Hernández Delgado, N. Martínez Rey, J.P. Lüke, J.M. Rodríguez Ramos, M.Sánchez Gestido, M. Bullock

The RVS3000 LiDAR sensor and its future in space robotics
Salzburg 2017

C.S. Schmitt, F.K. Kolb, M.W. Windmueller, M.R. Rö?ler

SPC for space, science fiction or reality
Salzburg 2017

J.a.p. Leijtens, A. los, S. Schmidt, J.M.U. Uittenhout

Design of a vision-based navigation camera for JUICE
Salzburg 2017

L. Oddos-Marcel, L.N. Nicollet, C.C. Chalte, L.M. Majewski, M.C. Chapuy, D.G. Gherardi, M. Beaumel, K.K. Kanani

Airbus CMG - an enabler for high pointing accuracy missions
Salzburg 2017

D.L. Lasnet, P.h.F. Faucheux

Building, testing and analysing robust and accurate cubesat reaction wheels
Salzburg 2017

A.J. Delabie, R.B. Boonen, D.V. Vandepitte

Reaction wheel performance - some experience with analysis, testing and flight operations
Salzburg 2017

R. Seiler, F. Liebold, T. Haefner

Evolution of next generation european MEMS inertial products
Salzburg 2017

R.J. Durrant, M. Utton, E. Whitly, S. Kowaltschek

Robustness of Astrix Fiber Optic Gyros in space radiative environment
Salzburg 2017

S. Masson

Development of a stand-alone 3-axis european accelerometer unit for spaceflight applications
Salzburg 2017

A.P. Bacon, D. Durrant, M.A. Utton, J. Vandersteen

Terma next generation star tracker using APS
Salzburg 2017

P. Davidsen, O. Mikkelsen, P. Bohn, C. gjevert Petersen, M. Lorenzen

Brand-new star trackers of Geofizika-Cosmos. From 348K success to new challenges
Salzburg 2017

V. Knyazev

Horus: a star tracker for space super highways
Salzburg 2017

M.F. Fullenbaum, B.G. Gelin, D.P. Prevost, J.F.B. Bouvry, P.E.M. Martinez, S.K. Kowaltschek

Stability of NASA's space launch system with adaptive augmenting control
Salzburg 2017

T.V.Z. Vanzwieten, M.H. Hannan, J.W. Wall

Determining spacecraft moment of inertia using in-orbit data
Salzburg 2017

A.K. Kornienko, P.D. Dhole, R.G. Geshnizjani, W.F. Fichter

Structured H-infinity control design for the VEGA launch vehicle: recovery of the legacy control behaviour
Salzburg 2017

D.N.T. Navarro-Tapia, A.n.d.r.é Marcos, S.a.m.i.r Bennani, C.h.r.i.s Roux

Model based active slosh damping experiment
Salzburg 2017

C.U.J. Jetzschmann, H.S. Strauch, S.B. Bennani

Spacecraft relative motion control using the state-dependent Riccati equation technique
Salzburg 2017

G.F. Franzini, M.T. Tannous, M.I. Innocenti

Formation flying control design for the PROBA-3 phase C/D
Salzburg 2017

J.V. Veenman, D.S.L. Serrano, R.S.M. Sánchez, A.C. Cropp, L.S. Strippoli, R.C.F. Contreras

Coupled AOCS and CFD analyses for high accuracy fuel sloshing prediction: improvement and validation via ISS experiment
Salzburg 2017

F.C. Cirillo, M.F. Franz, P.B. Behruzi, F.D.R. de Rose

Performance analysis of distinct control and estimation frameworks for spacecraft proximity operations involving severe uncertainties
Salzburg 2017

A.T.E. Teran Espinoza, C.M.J. Jewison