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InSAR and Geodetic Reference Systems
Ramon Hanssen
EUREF Tutorial, Amsterdam, 29-05-2018
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Contents
Afternoon session: InSAR and Geodetic Reference Systems
14:00 14:25 Datum connection and integration of techniques prof. Ramon Hanssen (NCG/TUD)
14:30 14:55 Geodetic infrastructure: Transponders and Reflectors dr. Hans van der Marel (TUD)
15:00 15:25 Practical experience: case study Groningen dr. Gini Ketelaar (NAM)
15:30 16:00 Coffee break
16:00 16:30 Transponders for operational practice dr. Adriano Meta (MetaSensing)
16:30 17:00 Practical experience: maintaining the Dutch Vertical Reference System Dr. Bas Alberts (RWS)
17:00
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InSAR datum connection and integration of techniques
Ramon Hanssen
EUREF Tutorial, Amsterdam, 29-05-2018
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Geodesy: Datum Connection
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5Challenge the futureMC Cuenca, R Hanssen, A Hooper, M Arikan Surface deformation of the whole Netherlands after PSI analysis Fringe2011
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y
Elevation Velocity+
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-7-6 -5-4-3-2-101
Terrain motion[mm/y]
-5-4-3-2-10123
01 2345678
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Double-difference observationsPR
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Time series bias
time
eleva
tion
Point A
time
eleva
tion
Point B
time
eleva
tion
Point C
time
eleva
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Point A
time
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Point B as reference
time
eleva
tion
Point C
time
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Point A as reference
time
eleva
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Point B
time
eleva
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Point C
Double-difference observations
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Geodetic datum connection:Transponders at permanent GPS stations
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‘Absolute’ InSAR velocities
• Transponders mechanically connected to GPS stations
Mahapatra, P. S.; Samiei-Esfahany, S.; van der Marel, H. & Hanssen, R. F., On the Use of Transponders as CoherenRadar Targets for SAR Interferometry, iEEE Trans. On Geosci & Rem Sens 2014, 52, 1869 - 1878
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Geodetic datum connection
Initial reference point
1 = transponder
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The standard approach
Reference point
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InSAR deformation estimates are relative
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‘Absolute’ InSAR velocities
Mahapatra, P. Van der Marel, H. Van Leijen, F, Samiei-Esfahany, R. Klees, R and R.F. Hanssen Connecting InSAR to a Global Geodetic Datum, IEEE Trans. Geosci Rem Sens, 2016,
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‘Absolute’ motion of large areas
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The outlook: operational systems
Radarsat-2
IJmuiden (IJMU)
Vlissingen (VLIS)
Eijsden (EIJS)
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Upscaling to Europe (EUREF)
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Upscaling: IGS network
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Metasensing transponders:“Electronic Corner Reflectors”
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Integrated Geodetic Reference Stations
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http://www.bodemdalingskaart.nl
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