Comparison between GNSS ground-based and GPS radio occultation precipitable water observations over ocean-dominated regions
Precipitable water (PW) inferred from GPS (Global Positioning System) radio occultation (RO) and ground-based (GB) Global Navigation Satellite System (GNSS) observations are compared between years 2007 and 2014. As previous studies were mainly performed over continental areas we now focus over ocean...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01698095_v209_n_p115_BurgosFonseca http://hdl.handle.net/20.500.12110/paper_01698095_v209_n_p115_BurgosFonseca |
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paper:paper_01698095_v209_n_p115_BurgosFonseca |
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paper:paper_01698095_v209_n_p115_BurgosFonseca2023-06-08T15:18:33Z Comparison between GNSS ground-based and GPS radio occultation precipitable water observations over ocean-dominated regions GNSS ground-based retrievals GPS radio occultations Precipitable water Landforms Radio Radio navigation Reliability analysis Global Navigation Satellite Systems Gps (global positioning system) GPS radio occultations Ground based Precipitable water Qualitative behavior Radio occultations Root mean square deviations Global positioning system GNSS GPS ground-based measurement precipitable water qualitative analysis time series analysis Precipitable water (PW) inferred from GPS (Global Positioning System) radio occultation (RO) and ground-based (GB) Global Navigation Satellite System (GNSS) observations are compared between years 2007 and 2014. As previous studies were mainly performed over continental areas we now focus over ocean-dominated geographical areas. Our analysis is done in order to find out how the reliability level of RO results over oceanic areas compares to land. As RO soundings usually miss some information close to the ground, we also assess different methods to complete the lacking data. We found 47 terrestrial stations that lie in islands small and far away from continental areas where the weather might be governed by the sea conditions. From comparisons of almost 5000 collocated samples, PW from RO and GB exhibit a global mean difference around 1 mm, root-mean-square deviation about 5 mm and a correlation above 0.9. The 2007–2014 timeseries and the monthly mean RO and GB PW were also compared to reanalyses per hemisphere, latitude regions and oceans. In each zone it was found that PW from RO, GB and reanalyses all exhibit in general consistent seasonal qualitative behavior. However, quantitative differences exist between reanalyses on one side and RO and GB on the other side. It is shown that PW from reanalyses lacks reliability in areas where the island topography is poorly represented by them. We also conclude that RO and GB seem to be more sensitive for the detection of features that depart from the regular annual cycle. © 2018 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01698095_v209_n_p115_BurgosFonseca http://hdl.handle.net/20.500.12110/paper_01698095_v209_n_p115_BurgosFonseca |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
GNSS ground-based retrievals GPS radio occultations Precipitable water Landforms Radio Radio navigation Reliability analysis Global Navigation Satellite Systems Gps (global positioning system) GPS radio occultations Ground based Precipitable water Qualitative behavior Radio occultations Root mean square deviations Global positioning system GNSS GPS ground-based measurement precipitable water qualitative analysis time series analysis |
| spellingShingle |
GNSS ground-based retrievals GPS radio occultations Precipitable water Landforms Radio Radio navigation Reliability analysis Global Navigation Satellite Systems Gps (global positioning system) GPS radio occultations Ground based Precipitable water Qualitative behavior Radio occultations Root mean square deviations Global positioning system GNSS GPS ground-based measurement precipitable water qualitative analysis time series analysis Comparison between GNSS ground-based and GPS radio occultation precipitable water observations over ocean-dominated regions |
| topic_facet |
GNSS ground-based retrievals GPS radio occultations Precipitable water Landforms Radio Radio navigation Reliability analysis Global Navigation Satellite Systems Gps (global positioning system) GPS radio occultations Ground based Precipitable water Qualitative behavior Radio occultations Root mean square deviations Global positioning system GNSS GPS ground-based measurement precipitable water qualitative analysis time series analysis |
| description |
Precipitable water (PW) inferred from GPS (Global Positioning System) radio occultation (RO) and ground-based (GB) Global Navigation Satellite System (GNSS) observations are compared between years 2007 and 2014. As previous studies were mainly performed over continental areas we now focus over ocean-dominated geographical areas. Our analysis is done in order to find out how the reliability level of RO results over oceanic areas compares to land. As RO soundings usually miss some information close to the ground, we also assess different methods to complete the lacking data. We found 47 terrestrial stations that lie in islands small and far away from continental areas where the weather might be governed by the sea conditions. From comparisons of almost 5000 collocated samples, PW from RO and GB exhibit a global mean difference around 1 mm, root-mean-square deviation about 5 mm and a correlation above 0.9. The 2007–2014 timeseries and the monthly mean RO and GB PW were also compared to reanalyses per hemisphere, latitude regions and oceans. In each zone it was found that PW from RO, GB and reanalyses all exhibit in general consistent seasonal qualitative behavior. However, quantitative differences exist between reanalyses on one side and RO and GB on the other side. It is shown that PW from reanalyses lacks reliability in areas where the island topography is poorly represented by them. We also conclude that RO and GB seem to be more sensitive for the detection of features that depart from the regular annual cycle. © 2018 |
| title |
Comparison between GNSS ground-based and GPS radio occultation precipitable water observations over ocean-dominated regions |
| title_short |
Comparison between GNSS ground-based and GPS radio occultation precipitable water observations over ocean-dominated regions |
| title_full |
Comparison between GNSS ground-based and GPS radio occultation precipitable water observations over ocean-dominated regions |
| title_fullStr |
Comparison between GNSS ground-based and GPS radio occultation precipitable water observations over ocean-dominated regions |
| title_full_unstemmed |
Comparison between GNSS ground-based and GPS radio occultation precipitable water observations over ocean-dominated regions |
| title_sort |
comparison between gnss ground-based and gps radio occultation precipitable water observations over ocean-dominated regions |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01698095_v209_n_p115_BurgosFonseca http://hdl.handle.net/20.500.12110/paper_01698095_v209_n_p115_BurgosFonseca |
| _version_ |
1768544269563330560 |