1. Continued Monitoring to calculate the local tie GNSS-VLBI.
O monitoramento contínuo para o cálculo do ligação local GNSS-VLBI.
Monitorización continúa para el cálculo del enlace local GNSS-VLBI.
Ing. Javier López-Ramasco
Dr. Álvaro Santamaría-Gómez
Centro de Desarrollos Tecnológicos de Yebes (CDTY). Instituto Geográfico Nacional.

2. Space geodetic techniques
D.O.R.I.S. / Doppler
V.L.B.I
G.N.S.S.
S.L.R.

3. Invariant Reference Point VLBI

4. Reflector Corner Cubes
System Performance
R.T.S Control Software
VB.net
Computer
R.T.S.
Robotic Total Station
Targets
Reflector Corner Cubes

5. Software t0 e Eccentricity X , Y , Z IRP Coordinates
Ф , λ Geocoordinates
T Local time
PC Precession
Correction
Additional Parameters
Meteorological Corrections
Geometric Corrections
Number and position of targets
R.T.S. Orientation
24h/365d
VLBI/Astro Session Schedule file
(*.snp)
S.N. Source Name
R.A. Right Ascension
D. Declination
Δt Obs. Time Interval
R.T.S Measure
X targets
Y targets
Z targets t0
Antenna
θ Azimuth
E. Elevation
X target
Y target
Z target
R.T.S.
H Azimuth
V Vertical Angle
ONLINE
Calculation Software
Mathematical model linearized.
Least square method.
Results
X , Y , Z IRP Coordinates
α , β Vertical axis inclination.
γ Torsion
e Eccentricity
Observation log file
(*.txt)
X targets
Y targets
Z targets
Antenna Sensors log file
(*.txt)
θ Azimuth (Antenna Sensor)
E Elevation (Antenna Sensor)
T.S. Time Stamp

6. Targets

7. To Do:
To built several concrete pillars and monumentation around the antennas.
To built new multiprisms (corner cubes) reflectors.
To test the new reflectors and to model the errors.
To test the accuracy of the system (R.T.S-Software) measures.
Static
Dynamic
To attach Targets at the VLBI antenna.
To install and measure of GNSS sensors.
To calculate the Local Tie Vector (I.R.P.) applying the mathematical model and to study the results.