astro.oma.be

icecon2012.blogspot.com

IceCon: Constraining Ice Mass Change in Antarctica: March 2012

http://icecon2012.blogspot.com/2012_03_01_archive.html

IceCon: Constraining Ice Mass Change in Antarctica. Monday, March 26, 2012. IceCon is a project funded by the Federal Science Policy Office ( BELSPO. And aims at constraining past and current mass changes of the Antarctic ice sheet in the coastal area of Dronning Maud Land, Antarctica. It comprises 6 partners of several Belgian and foreign institutions, i.e. Université Libre de Bruxelles ( ULB. Royal Observatory of Belgium ( ROB. University of Luxembourg ( UL. Norwegian Polar Institute ( NPI.

gps.oma.be

GNSS@ROB - VTEC Time Series

http://gps.oma.be/Atmospheric_Maps/VTEC_Time_Series.php

Royal Observatory of Belgium. Figure 1 shows the evolution over time of the Vertical Total Electron Content. VTEC) in the ionosphere ( in red. Extracted from the near-real time 15-min VTEC maps. At 3 different locations (Figure 2):. A) Northern part (top). C) Southern part (bottom). Also shown, the model based on the median of the 15 previous days ( in grey. With its standard deviation represented as error bars and the VTEC variability ( in dark red. Figure 1: VTEC Time Series. GPS, GLONASS, GALILEO, .

gps.oma.be

GNSS@ROB - GNSS Data

http://gps.oma.be/ROB_Network/data.php

Royal Observatory of Belgium. Apr 22, 2016 by ROB. The ROB mountains several continuously observing GPS tracking stations. The observation data from some of the stations are freely available to the public. 2 GNSS Data for Post-Processing. GNSS stations generate data files in the RINEX. The RINEX observation data can be dowloaded from. Daily files, 30 sec. sampling rate (on-line for a period of 1 year) : BRUX DENT DOUR WARE. Ftp:/ gnss.oma.be/gnss/data/rinex/daily/. 3 Real-Time GNSS Data. Many proprietary...

gps.oma.be

GNSS@ROB - Atomium

http://gps.oma.be/atomium.php

Royal Observatory of Belgium. Apr 09, 2010 by ROB. Atomium is a software developped by the ROB for geodetic positionning and time transfer. Based on GNSS code and carrier phase measurements analysis, it was originally dedicated to perform Precise Point Positioning (PPP), but it can also perform GNSS based time and frequency transfer in Single Difference mode. The PPP procedure is fully described in (Kouba-Heroux 2001). It uses a least-square adjustment to estimate several parameters :. Station position i...

gps.oma.be

GNSS@ROB - Atmosphere

http://gps.oma.be/atmosphere_tutorial.php

Royal Observatory of Belgium. Aug 19, 2010 by ROB. 1 The Earth's Atmosphere. The Earth's atmosphere can be divided in two major parts for GNSS applications: troposphere and ionosphere. The troposphere is the lowest region of Earth's atmosphere ranging from 0 to 50km. It is the seat of all meteorological phenomena's (clouds, rain, hydrometeors.) and contains approximately 75% of the atmosphere's mass and almost all (99%) of its water vapour and aerosols. 2 GNSS Signals and Earth's Atmosphere. The two atmo...

gps.oma.be

GNSS@ROB - Atmosphere

http://gps.oma.be/atmosphere.php

Royal Observatory of Belgium. Apr 16, 2010 by ROB. Figure 1 : Network of GNSS stations processed by the ROB analysis centre in the frame of E-GVAP (Status: February 2009). Figure 2 : Global structure of the ROB processing methodology. Troposphere Zenith Path delay time series. European Troposphere Zenith Path Delay grids. Troposphere Zenith Path Delay Time Series. Figure 3 : Tropospheric zenith path delay time series for Onsala, Sweden. Troposphere Zenith Path Delay Grids. The ROB post-processing solution.

gps.oma.be

GNSS@ROB - How GNSS Works

http://gps.oma.be/how_tutorial.php

Royal Observatory of Belgium. Oct 10, 2011 by ROB. 2 In the Ideal World. 3 In the Real World. 4 How a GNSS Receiver Works. Global Navigation Satellite Systems are satellite ensembles which allow to any user on or near the Earth (as for example an aircraft or a low altitude satellite) to determine its position with a precision from some meters to some centimeters (more details in the "GPS, GLONASS, Galileo,.". 2 In the Ideal World. Figure 1: Location determination. Based on intersecting spheres. In order ...

gps.oma.be

GNSS@ROB - How GNSS Works

http://gps.oma.be/gnss_tutorial.php

Royal Observatory of Belgium. Apr 09, 2010 by ROB. 1 What is GNSS? Global Navigation Satellite System" (GNSS) is a generic term, referring to any global system using satellites which allow users to determine their position and hence allowing them to navigate themselfs to any target destination. As the system is global, it offers a world wide coverage and it allows to determine positions relative to any. A difficulty of a global system, as explained in the Tutorial How GNSS Works. About 30 satellites at a...

minorplanetcenter.net

List Of Observatory Codes

http://www.minorplanetcenter.net/iau/lists/ObsCodesF.html

The International Astronomical Union Minor Planet Center. Orbital Elements for Software. Summary of Latest Data. List Of Observatory Codes. The following list gives the observatory code, longitude (in degrees east of Greenwich) and the parallax constants (rho cos phi' and rho sin phi', where phi' is the geocentric latitude and rho is the geocentric distance in earth radii) for each observatory. It is updated nightly. See the Guide to Minor Body Astrometry. For what to do if you move your observatory.