scholarly journals Geodetic aspects of GPS permanent station non-linearity studies

2015 ◽  
pp. 323-333 ◽  
Author(s):  
Janusz Bogusz
Keyword(s):  
Permanent Station

Intercomparison and Validation of GNSS-IWV Derived with G-Nut and Bernese Software

2017 ◽  
Author(s):  
Pawel Golaszewski ◽  
Pawel Wielgosz ◽  
Katarzyna Stepniak
Keyword(s):  
Water Vapor ◽  
Meteorological Data ◽  
Microwave Radiometer ◽  
Severe Weather ◽  
Final Solution ◽  
Weather Forecasts ◽  
Software Packages ◽  
Gnss Measurements ◽  
Gnss Data ◽  
Permanent Station

GNSS is an important source of meteorological data. GNSS measurements can provide tropospheric Zenith Wet Delays (ZWD) over wide area covered with permanent stations. In addition, when using surface synoptical data, GNSS can provide Integrated Water Vapor (IWV) which is very valuable information utilized in weather forecasts and severe weather monitoring. Hence, there is a need to test and validate various algorithms and software used for ZWD estimation. In this research, the accuracy of the ZWD estimates was tested using two different software packages: Bernese GNSS Software v.5.2 and G-Nut/Tefnut. In addition, their computational load was evaluated. The GNSS data were obtained from POTS permanent station, which is located in Potsdam, Germany. To validate the estimation results, the derived ZWD was transformed into the IWV, and afterwards compared to the reference IWV measured by the collocated Microwave Radiometer. In addition, the ZWD estimates were also compared to the EUREF final solution.

scholarly journals Study of Calcium-K Network Evolution from Antarctica

1993 ◽  
Vol 141 ◽  
pp. 410-411
Author(s):  
Jagdev Singh
Keyword(s):  
Magnetic Field ◽  
Life Time ◽  
Network Evolution ◽  
Solar Telescope ◽  
Continuous Sequence ◽  
Set Up ◽  
Convective Cells ◽  
Permanent Station

AbstractTo study the evolution and decay of large convective cells known as supergranules, a solar telescope was set up at Maitri, Indian permanent station in Antarctica region during the local summer months (December 1989 through March 1990). A continuous sequence of calcium-K-line filtergrams for 106 hours with an interval of about 10 minute was obtained. The analysis of this data indicates that most probable life time of the calcium K network is about 20 hours. The life time depends upon the size of the cell and is larger for bigger cells. The data also show that cells (of given size) associated with remanent magnetic field regions live longer than those in the region free from magnetic field regions.

scholarly journals Towards Reliable Velocities of Permanent GNSS Stations

2016 ◽  
Vol 100 (1) ◽  
pp. 17-26
Author(s):  
Janusz Bogusz ◽  
Anna Klos ◽  
Marta Gruszczynska ◽  
Maciej Gruszczynski
Keyword(s):  
Time Series ◽  
Singular Spectrum Analysis ◽  
Principal Component ◽  
North East ◽  
Temporal Correlations ◽  
The North ◽  
Spatio Temporal ◽  
Permanent Station

Abstract In the modern geodesy the role of the permanent station is growing constantly. The proper treatment of the time series from such station lead to the determination of the reliable velocities. In this paper we focused on some pre-analysis as well as analysis issues, which have to be performed upon the time series of the North, East and Up components and showed the best, in our opinion, methods of determination of periodicities (by means of Singular Spectrum Analysis) and spatio-temporal correlations (Principal Component Analysis), that still exist in the time series despite modelling. Finally, the velocities of the selected European permanent stations with the associated errors determined following power-law assumption in the stochastic part is presented.

Testing prediction models of land subsidence on GPS permanent station

2008 ◽  
Author(s):  
Hung-Zi Chen ◽  
Pen-shan Hung ◽  
Chia-Chyang Chang
Keyword(s):  
Land Subsidence ◽  
Prediction Models ◽  
Permanent Station

The first marine biological station in Canada: 100 years of scientific research at St. Andrews

1999 ◽  
Vol 56 (12) ◽  
pp. 2495-2507 ◽  
Author(s):  
Edward A Trippel
Keyword(s):  
New Brunswick ◽  
Canadian Journal ◽  
Aquatic Environment ◽  
100Th Anniversary ◽  
Early Research ◽  
Marine Research ◽  
Biological Station ◽  
Marine Biological ◽  
Aquatic Sciences ◽  
Permanent Station

The first marine biological station in Canada was established in St. Andrews, New Brunswick, in July 1899. The original station was a portable laboratory and was moved between various summer research sites in Atlantic Canada before a permanent station was established in St. Andrews in 1908. Early research included practical problems in the fisheries and descriptive work of coastal fauna and was performed by university researchers. Contributions to Canadian Biology, a journal founded to report the findings of the early station's researchers, in time evolved into the Canadian Journal of Fisheries and Aquatic Sciences. For the first 75 years, the station was managed as part of the Fisheries Research Board of Canada and its predecessors, and since 1979 by the Department of Fisheries and Oceans (from 1972 to 1978, two other government departments held this responsibility). Research on fisheries, the environment, oceanography, and aquaculture has dominated the station's history. July 1999 marked the 100th anniversary of marine research in St. Andrews. We celebrate and remember with pride our accomplishments and look forward to the future of conserving Canada's aquatic environment and the livelihood of Atlantic Canadians.

scholarly journals PERMANENT STATION OF SPACE GEODESY NVSK AND ISKITIM EARTHQUAKES

2019 ◽  
Vol 2 (2) ◽  
pp. 19-26
Author(s):  
Vladimir Timofeev ◽  
Dmitriy Ardyukov ◽  
Elena Boyko ◽  
Anton Timofeev
Keyword(s):  
Electric Power ◽  
Coal Mines ◽  
Water Reservoir ◽  
Network Measurement ◽  
Space Geodesy ◽  
Electric Power Station ◽  
Gas Oil ◽  
Power Station ◽  
Ecological Problems ◽  
Permanent Station

We discuss technical-ecological problems. Displacement and tilt results, received at permanent station Klyuchi (11 km from Novosibirsk) during Iskitim earthquakes period, were presented for 2017-2019 yy. These earthquakes happened at Iskitim coal-mines territory, 50 km from Novosibirsk and 20 km from Berdsk. We review effects connected with building of water-reservoirs and with exploitation of deposits. Space geodesy receivers GLONASS-GPS type, tilt-meters and gravimeters were used at NVSK (Klyuchi) station. This complex was used for network measurement. We discuss the results of displacement-strain observation at Ust-Balyk gas-oil deposit, Zapolyarnii gas deposit and for water-reservoir of Sayan-Shushenskoe Electric Power Station (SSEPS).

Activities on the King George Island group, South Shetland Islands, Antarctica

Polar Record ◽  
1985 ◽  
Vol 22 (140) ◽  
pp. 475-484 ◽  
Author(s):  
R. K. Headland ◽  
P. L. Keage
Keyword(s):  
South Shetland Islands ◽  
Falkland Islands ◽  
King George Island ◽  
Republic Of China ◽  
Shetland Islands ◽  
Island Group ◽  
Antarctic Treaty ◽  
The 19Th Century ◽  
Permanent Station ◽  
Central South

AbstractKing George Island and Nelson Island, close together in the central South Shetland Islands, were discovered early in the 19th century and often visited by whalers and sealers. Whalers also used their harbours early in the present century. The first permanent station was established in 1947 by the Falkland Islands Dependencies Survey. Currently they are the site of scientific stations and depots operated by eight Antarctic Treaty nations (Argentina, Brazil, Britain, Chile, Peoples' Republic of China, Poland, USSR and Uruguay), all of which make use of their accessible harbours and relatively long summer season.

Sign in / Sign up

Export Citation Format

Share Document