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gps (11) 11
earth (8) 8
global positioning system (8) 8
geochemistry & geophysics (7) 7
deformation (6) 6
models (6) 6
satellite navigation systems (6) 6
displacement (5) 5
antarctica (4) 4
delay (4) 4
errors (4) 4
geosciences, multidisciplinary (4) 4
global positioning systems--gps (4) 4
gnss (4) 4
interferometry (4) 4
meteorology & atmospheric sciences (4) 4
ocean tides (4) 4
radar (4) 4
remote sensing (4) 4
synthetic aperture radar (4) 4
tides (4) 4
troposphere (4) 4
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analysis (3) 3
atmospheric correction (3) 3
estimates (3) 3
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gravity (3) 3
ground-based gps (3) 3
humans (3) 3
impact (3) 3
index medicus (3) 3
insar (3) 3
interferometric synthetic aperture radar (3) 3
mathematical models (3) 3
ocean models (3) 3
ocean tide loading (3) 3
ocean tide models (3) 3
oceanography (3) 3
oceans (3) 3
precipitable water (3) 3
resolution (3) 3
risk factors (3) 3
studies (3) 3
tide gauges (3) 3
topography (3) 3
turbulence (3) 3
validation (3) 3
accuracy (2) 2
adolescent (2) 2
allografts (2) 2
anelasticity (2) 2
asthenosphere (2) 2
atmospheric effects (2) 2
atmospheric models (2) 2
computations (2) 2
constituents (2) 2
decomposition (2) 2
disease (2) 2
earth models (2) 2
efficient (2) 2
feasibility studies (2) 2
gastroenterology & hepatology (2) 2
geodesy (2) 2
geodetics (2) 2
geophysics/geodesy (2) 2
glacial isostatic adjustment (2) 2
global navigation satellite system (2) 2
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seismology (2) 2
shear modulus (2) 2
single-center experience (2) 2
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1. Pest and disease control of protected crops, outdoor bulbs and corms
by Penna, R. J and British Crop Protection Council
1984, ISBN 9780901436825, ix, p. 375-573
Plantes | Control | Plants, Protection of | Pests | Animaux et plantes nuisibles, Lutte contre les | Protection
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2. Full Text Generation of real‐time mode high‐resolution water vapor fields from GPS observations
by Yu, Chen and Penna, Nigel T and Li, Zhenhong
Journal of Geophysical Research: Atmospheres, ISSN 2169-897X, 02/2017, Volume 122, Issue 3, pp. 2008 - 2025
Pointwise GPS measurements of tropospheric zenith total delay can be interpolated to provide high‐resolution water vapor maps which may be used for correcting... 
real‐time GPS PPP | tropospheric delays | precipitable water vapor | MODIS | real-time GPS PPP | INTERPOLATION | SURFACE-TEMPERATURE | PRODUCTS | INTERFEROMETRIC MEASUREMENTS | TROPOSPHERE | DATA ASSIMILATION | RADIOSONDE | METEOROLOGY & ATMOSPHERIC SCIENCES | GROUND-BASED GPS | ATMOSPHERIC MODELS | DELAY | Atmospheric circulation | Real time | Global positioning systems--GPS | Troposphere | Infrared spectroscopy | Climatology | High resolution | Turbulent flow | Weather forecasting | Satellite navigation systems | Decomposition | Coastal zone | Components | Mountains | Elevation | Water vapour | Maps | Radar | Radar imaging | Mathematical models | Synthetic aperture radar | Turbulence | Imaging techniques | Time measurement | Water vapor | Zenith | Estimates | Cells | Global Positioning System | Weather | Interpolation | Errors | Fields | Converting | Precipitable water | Models | Resolution | Delay
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3. Interferometric synthetic aperture radar atmospheric correction using a GPS-based iterative tropospheric decomposition model
by Chen Yu and Zhenhong Li and Nigel T Penna
Remote Sensing of Environment, ISSN 0034-4257, 01/2018, Volume 204, p. 109
Atmospheric effects represent one of the major error sources of repeat-pass Interferometric Synthetic Aperture Radar (InSAR), and could mask actual... 
Deformation | Turbulent flow | Noise reduction | Atmospheric models | Troposphere | Satellite navigation systems | Synthetic aperture radar interferometry | Decomposition | Interferometric synthetic aperture radar | Global positioning systems--GPS | Topography | Satellite radar | Radar | Iterative methods | Synthetic aperture radar | Interferometry | Turbulence | Atmospheric effects | Atmospheric correction | Feasibility studies | Data processing | Climate models | Global Positioning System | Studies | Satellites
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4. Full Text Practical considerations before installing ground-based geodetic infrastructure for integrated InSAR and cGNSS monitoring of vertical land motion
by Parker, Amy L and Featherstone, Will E and Penna, Nigel T and Filmer, Mick S and Garthwaite, Matt C
Sensors (Switzerland), ISSN 1424-8220, 08/2017, Volume 17, Issue 8, p. 1753
Continuously operating Global Navigation Satellite Systems (cGNSS) can be used to convert relative values of vertical land motion (VLM) derived from... 
Displacement monitoring | Geodetic networks | TerraSAR-X | Sentinel-1 | Corner reflectors | InSAR | Continuous GNSS | Vertical land motion | ELECTROCHEMISTRY | CRUSTAL MOTION | CHEMISTRY, ANALYTICAL | EARTHS SURFACE | displacement monitoring | continuous GNSS | GPS | DEFORMATION | geodetic networks | REFERENCE FRAMES | TIDE-GAUGE | SATELLITE RADAR INTERFEROMETRY | SUBSIDENCE | INSTRUMENTS & INSTRUMENTATION | sentinel-1 | TIME-SERIES | vertical land motion | corner reflectors | Global navigation satellite system | Reflectors | Navigation satellites | Interferometric synthetic aperture radar | Infrastructure | Visibility | Imagery | Clutter | Monitoring | Ionosphere | Interferometry
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5. Full Text Interferometric synthetic aperture radar atmospheric correction using a GPS-based iterative tropospheric decomposition model
by Yu, Chen and Li, Zhenhong and Penna, Nigel T
Remote Sensing of Environment, ISSN 0034-4257, 01/2018, Volume 204, pp. 109 - 121
Atmospheric effects represent one of the major error sources of repeat-pass Interferometric Synthetic Aperture Radar (InSAR), and could mask actual... 
Performance indicator | InSAR | GPS | Atmospheric correction | Station spacing | Tropospheric delay | SAR INTERFEROMETRY | NETWORK | SURFACE DEFORMATION | VALIDATION | IMAGING SCIENCE & PHOTOGRAPHIC TECHNOLOGY | ENVIRONMENTAL SCIENCES | SCATTERERS | REMOTE SENSING | WATER-VAPOR | CYCLE | Usage | Turbulence | Artificial satellites in remote sensing | Analysis | Tectonics (Geology) | Troposphere | Models | Equipment and supplies | Noise control | Synthetic aperture radar | Global Positioning System
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6. Full Text GPS height time series: Short-period origins of spurious long-period signals
by Nigel T. Penna and Matt A. King and Mike P. Stewart
Journal of Geophysical Research - Solid Earth, ISSN 0148-0227, 02/2007, Volume 112, Issue B2, pp. B02402 - n/a
GPS height time series used in geophysical studies are often formed from discrete, continuous, nonoverlapping 24 hour processing sessions. With such a... 
Geodesy and Gravity | technical issues | results | Satellite geodesy | Instruments and techniques | GPS height time series | data artifact | tidal crustal displacement | GEOCHEMISTRY & GEOPHYSICS | EARTH | ERRORS | DISPLACEMENTS | LINE | GRAVITY | DEFORMATION | EFFICIENT | LOADING CORRECTIONS | GAUGE | OCEAN TIDE MODELS
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7. Full Text Asthenospheric anelasticity effects on ocean tide loading in the East China Sea region observed with GPS
by Wang, Junjie and Penna, Nigel T and Clarke, Peter J and Bos, Machiel S
Solid Earth Discussions, ISSN 1869-9537, 09/2019, pp. 1 - 22
Abstract. Anelasticity may decrease the shear modulus of the asthenosphere by 8-10 % at semi-diurnal tidal periods compared with the reference 1 s period of... 
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8. Full Text Outcomes of pregnancy following liver transplantation: The King's College Hospital experience
by Westbrook, Rachel H and Yeoman, Andrew D and Agarwal, Kosh and Aluvihare, Varuna and O'Grady, John and Heaton, Nigel and Penna, Leonie and Heneghan, Michael A
Liver Transplantation, ISSN 1527-6465, 09/2015, Volume 21, Issue 9, pp. 1153 - 1159
Reports of pregnancy in liver transplantation (LT) patients have largely favorable outcomes. Concerns remain with regards to maternal and graft risk, optimal... 
SURVIVAL | SURGERY | SINGLE-CENTER EXPERIENCE | CONTRACEPTION | RECIPIENTS | FERTILITY | TRANSPLANTATION | WOMEN | DISEASE | COMPLICATIONS | PATIENT | TACROLIMUS | GASTROENTEROLOGY & HEPATOLOGY | Pregnancy Complications - etiology | Liver Transplantation - adverse effects | Risk Assessment | Developmental Disabilities - etiology | Humans | Live Birth | Risk Factors | Graft Rejection - etiology | Graft Survival | Liver Transplantation - mortality | Treatment Outcome | Graft Rejection - diagnosis | Pregnancy Complications - diagnosis | Pregnancy | Allografts | Pregnancy Complications - mortality | Time Factors | Graft Rejection - mortality | London | Adult | Female | Immunosuppressive Agents - adverse effects | Developmental Disabilities - diagnosis | Pregnancy Rate
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9. Full Text Sea Surface Height Measurement Using a GNSS Wave Glider
by Penna, Nigel T and Morales Maqueda, Miguel A and Martin, Ian and Guo, Jing and Foden, Peter R
Geophysical Research Letters, ISSN 0094-8276, 06/2018, Volume 45, Issue 11, pp. 5609 - 5616
To overcome spatial and temporal limitations of sea surface height instruments such as tide gauges, satellite altimetry, and Global Navigation Satellite... 
sea surface height | significant wave height | Wave Glider | dynamic ocean topography | GNSS | geoid | SATELLITE ALTIMETRY | GEOSCIENCES, MULTIDISCIPLINARY | Strategic management | Structural design | Sea surface | Measuring instruments | Deployment | Slopes (topography) | Tides | Gauges | Coastal ecosystems | Finite element method | Global navigation satellite system | Satellite altimetry | Geoid | Topography | Surface vehicles | Erosion | Instruments | Oceans | Topography (geology) | Sediment pollution | Climatic changes | Coastal erosion | Sea level | Temperature (air-sea) | Buoys | Pollution dispersion | Satellites | Navigation systems | Resolution | Measurement | Satellite-borne instruments | Tracking | Earth gravitation | Navigation satellites | Ecosystems | Spatial discrimination | Instrumentation | Environmental changes | Remote sensing | Earth | Ships | Local winds | Receivers & amplifiers | Radar | Standard deviation | Height | Pollutants | Gravity | In situ measurement | Wave height | Gravitation | Navigation | Solar power | Structural engineering | Sediments | Water depth | Tide gauges | Climate change | Satellite tracking | Navigation satellite | Spatial resolution
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10. Full Text Successful pregnancy outcomes following liver transplantation is predicted by renal function
by Lim, Tiong Y and Gonsalkorala, Enoka and Cannon, Mary D and Gabeta, Stella and Penna, Leonie and Heaton, Nigel D and Heneghan, Michael A
Liver Transplantation, ISSN 1527-6465, 05/2018, Volume 24, Issue 5, pp. 606 - 615
Liver transplantation (LT) is a successful treatment for both acute liver failure and end‐stage liver disease. The number of women of reproductive age... 
SURVIVAL | SURGERY | SINGLE-CENTER EXPERIENCE | UNITED-KINGDOM | METAANALYSIS | SCORE | RISK | RECIPIENTS | TRANSPLANTATION | WOMEN | DISEASE | COHORT | GASTROENTEROLOGY & HEPATOLOGY
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11. Full Text GPS precise point positioning for UAV photogrammetry
by Grayson, Ben and Penna, Nigel T and Mills, Jon P and Grant, Darion S
The Photogrammetric Record, ISSN 0031-868X, 12/2018, Volume 33, Issue 164, pp. 427 - 447
The use of Global Positioning System (GPS) precise point positioning (PPP) on a fixed‐wing unmanned aerial vehicle (UAV) is demonstrated for photogrammetric... 
precise point positioning | structure from motion | unmanned aerial vehicle | GPS | direct georeferencing | IMAGERY | ACCURACY ASSESSMENT | GNSS | RESOLUTION | IMAGING SCIENCE & PHOTOGRAPHIC TECHNOLOGY | QUALITY ASSESSMENT | FEATURES | FROM-MOTION SFM | GEOGRAPHY, PHYSICAL | GEOSCIENCES, MULTIDISCIPLINARY | REMOTE SENSING | GROUND CONTROL | ORIENTATION | AERIAL | Carnivores | Geographical locations | Cartography | Installation | Global positioning systems--GPS | Satellite navigation systems | Unmanned aerial vehicles | Mapping | Ground stations | Photogrammetry | Global Positioning System | Logistics
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12. Full Text Generic Atmospheric Correction Model for Interferometric Synthetic Aperture Radar Observations
by Yu, Chen and Li, Zhenhong and Penna, Nigel T and Crippa, Paola
Journal of Geophysical Research: Solid Earth, ISSN 2169-9313, 10/2018, Volume 123, Issue 10, pp. 9202 - 9222
For mapping Earth surface movements at larger scale and smaller amplitudes, many new synthetic aperture radar instruments (Sentinel‐1A/B, Gaofen‐3, ALOS‐2)... 
InSAR | tropospheric delay | GACOS | GPS | atmospheric correction | ECMWF | INTERPOLATION | GEOCHEMISTRY & GEOPHYSICS | SCATTERERS | INSAR | SLIP | VALIDATION | MITIGATION | DEFORMATION | WATER-VAPOR CORRECTION | PREDICTION | Deformation | Weather forecasting | Spatial discrimination | Troposphere | Earth surface | Radarsat | Constellations | Delay | Confidence intervals | Earth | Maps | Interferometric synthetic aperture radar | Polar environments | Radar | Apertures | Automatic control | Temporal variations | Iterative methods | Indicators | Synthetic aperture radar | Polar regions | Interferometry | Atmospheric effects | Instruments | Atmospheric correction | Earth movements | Feasibility studies | Topography (geology) | Regions | Weather | Quality control | Feasibility
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13. Full Text Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations
by Thomas, I.D and King, M.A and Bentley, M.J and Whitehouse, P.L and Penna, N.T and Williams, S.D.P and Riva, R.E.M and Lavallee, D.A and Clarke, P.J and King, E.C and Hindmarch, R.C.A and Koivula, H
Geophysical Research Letters, 38, 2011, ISSN 0094-8276, 11/2011, Volume 38, Issue 22, p. n/a
Bedrock uplift in Antarctica is dominated by a combination of glacial isostatic adjustment (GIA) and elastic response to contemporary mass change. Here, we... 
glacial isostatic adjustment | Antarctica | GPS velocity | IMPACT | GEOSCIENCES, MULTIDISCIPLINARY | MAXIMUM | STABILITY | GRACE | ICE-AGE EARTH | PENINSULA | GREENLAND | SHEET | WEDDELL SEA EMBAYMENT | HISTORY | Space | Paleoclimate science | Rheology | Rock deformation | Geodetic surveys | Geodetics | Atmospheric sciences | Cryosphere | Stations | Satellite navigation systems | GRACE (experiment) | Estimates | Bedrock | Global Positioning System | Geographic information systems
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14. Full Text Precipitable water vapor estimates from homogeneously reprocessed GPS data: An intertechnique comparison in Antarctica
by Thomas, Ian D and King, Matt A and Clarke, Peter J and Penna, Nigel T
Journal of Geophysical Research: Atmospheres, ISSN 0148-0227, 02/2011, Volume 116, Issue D4, pp. 1A - n/a
Homogeneously reprocessed GPS data offer the possibility of an accurate, stable, and increasingly long‐term record of integrated precipitable water vapor (PW)... 
Antarctica water vapor | RADIOSONDE DATA | MAP SOP | SATELLITE ANTENNA | IMPACT | HUMIDITY | OCEAN TIDES | MAPPING FUNCTIONS | VALIDATION | METEOROLOGY & ATMOSPHERIC SCIENCES | GROUND-BASED GPS | DRY BIAS
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