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Showing 18 out of a total of 18 results for collection: Research Articles (Geography, Geoinformatics and Meteorology).
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Thermal analysis of the LLR optical telescope tube assembly based in Hartebeesthoek Radio Astronomy Observatory
Tsela, Philemon Lehlohonolo
;
Combrinck, Ludwig
;
Botha, R.
;
Ngcobo, B.
(
Springer
,
2016-09
)
Analysis of the performance of hydrogen maser clocks at the Hartebeesthoek Radio Astronomy Observatory
Munghemezulu, Cilence
;
Combrinck, Ludwig
;
Botai, Joel Ongego
;
Quick, J.
(
CONSAS Conference
,
2016-11
)
Global geopotential models from satellite laser ranging data with geophysical applications : a review
Botai, Mihloti Christina
;
Combrinck, Ludwig
(
Academy of Science of South Africa
,
2012-03
)
Investigating the accuracy of gravity field models using satellite laser ranging data
Botai, Mihloti Christina
;
Combrinck, Ludwig
(
Geological Society of South Africa
,
2011-12
)
Inferences of α-stable distribution of the underlying noise components in geodetic data
Botai, Joel Ongego
;
Combrinck, Ludwig
;
Sivakumar, Venkataraman
(
Geological Society of South Africa
,
2011-12
)
Importance of the Hartebeesthoek Radio Astronomy Observatory for the VLBI network
Mayer, D.
;
Bohm, J.
;
Combrinck, Ludwig
;
Botai, Joel Ongego
;
Bohm, S.
(
Springer
,
2014-09
)
Testing the general relativity theory through the estimation of PPN parameters γ and ß using satellite laser ranging data
Combrinck, Ludwig
(
Geological Society of South Africa
,
2011
)
Evaluating spectral indices for winter wheat health status monitoring in Bloemfontein using Lsat 8 data
Mashaba, Zinhle
;
Chirima, Johannes George
;
Botai, Joel Ongego
;
Combrinck, Ludwig
;
Munghemezulu, Cilence
(
CONSAS Conference
,
2016-09
)
A spatiotemporal analysis of the effect of ambient temperatures on the thermal behaviour of the Lunar Laser Ranging optical telescope at Hartebeesthoek Radio Astronomy Observatory
Tsela, Philemon Lehlohonolo
;
Combrinck, Ludwig
;
Ngcobo, B.
(
CONSAS Conference
,
2016-11
)
Accuracy comparison of Pleiades satellite ortho-images using GPS device based GCPs against TerraSAR-X-based GCPs
Henrico, Ivan
;
Combrinck, Ludwig
;
Eloff, Corne
(
CONSAS Conference
,
2016-11
)
Satellite laser ranging measurements in South Africa : contributions to earth system sciences
Botai, Mihloti Christina
;
Combrinck, Ludwig
;
Botai, Joel Ongego
(
AOSIS OpenJournals
,
2015-03
)
Mapping GPS multipath : a case study for the lunar laser ranger timing antenna at HartRAO
Munghemezulu, Cilence
;
Combrinck, Ludwig
;
Botai, Joel Ongego
;
Mashaba, Zinhle
(
CONSAS Conference
,
2016-09
)
Comparison of site velocities derived from collocated GPS, VLBI and SLR techniques at the Hartebeesthoek Radio Astronomy Observatory (Comparison of site velocities)
Munghemezulu, Cilence
;
Combrinck, Ludwig
;
Mayer, D.
;
Botai, Joel Ongego
(
De Gruyter Open
,
2014-04
)
Design of a web-based GNSS data management system at HartRAO : preliminary results
Mashaba, Zinhle
;
Combrinck, Ludwig
;
Botai, Joel Ongego
;
Munghemezulu, Cilence
;
Botha, R.C.
(
Geological Society of South Africa
,
2016-03
)
Forecasting winter wheat yields using MODIS NDVI data for the Central Free State region
Mashaba, Zinhle
;
Chirima, Johannes George
;
Botai, Joel Ongego
;
Combrinck, Ludwig
;
Munghemezulu, Cilence
;
Dube, Ernest
(
Academy of Science of South Africa
,
2017-11
)
The potential for observing African weather with GNSS remote sensing
Isioye, Olalekan A.
;
Combrinck, Ludwig
;
Botai, Joel Ongego
;
Munghemezulu, Cilence
(
Hindawi Publishing
,
2015
)
A review of the lunar laser ranging technique and contribution of timing systems
Munghemezulu, Cilence
;
Combrinck, Ludwig
;
Botai, Joel O.
(
AOSIS OpenJournals
,
2016-03
)
On the global geodetic observing system : Africa's preparedness and challenges
Botai, Joel Ongego
;
Combrinck, Ludwig
;
Rautenbach, Cornelis Johannes de Wet
(
Elsevier
,
2013-02
)
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Author
Combrinck, Ludwig (18)
Botai, Joel Ongego (11)
Munghemezulu, Cilence (8)
Mashaba, Zinhle (4)
Botai, Mihloti Christina (3)
Chirima, Johannes George (2)
Mayer, D. (2)
Ngcobo, B. (2)
Tsela, Philemon Lehlohonolo (2)
Bohm, J. (1)
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Hartebeesthoek Radio Astronomy Observatory (HartRAO) (5)
Global navigation satellite system (GNSS) (3)
Satellite laser ranging (3)
Artificial satellites -- Orbits (2)
Dedicated satellite missions (2)
Global geopotential models (2)
Gravitational fields -- Models (2)
Lunar laser ranging (LLR) (2)
Satellite orbit determination (2)
Space geodesy (2)
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2016 (8)
2011 (3)
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2015 (2)
2012 (1)
2013 (1)
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