GB-SAR measurements at Belvedere Glacier
GB-SAR measurements at Belvedere Glacier
GB-SAR measurements at Belvedere Glacier
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<strong>GB</strong>-<strong>SAR</strong> <strong>measurements</strong><strong>at</strong> <strong>Belvedere</strong> <strong>Glacier</strong>Daniele Mec<strong>at</strong>ti – University of FlorenceMacugnaga, August 31 st , 2007
The Ground Based Synthetic Aperture Radar
The Ground Based Synthetic Aperture Radar
The power supply systemwindsunw<strong>at</strong>er
System accessoriesvideocameraGPRS connectionradio link
The transport<strong>at</strong>ion of the systemInstall<strong>at</strong>ion time (two people):• Only the <strong>GB</strong>-<strong>SAR</strong> equipment >> 3 hours• <strong>GB</strong>-<strong>SAR</strong> System + Solar Panels + Wind Gener<strong>at</strong>ors >> 8 hours• Hydroelectric Turbine >> 8 hours
How it works (I)Three movements:1. Horizontal movement: <strong>SAR</strong> Synthesis (typically 18-20 minutes)2. Vertical movement: Digital Elev<strong>at</strong>ion Model (typically 3-4 hours)3. Rot<strong>at</strong>ion: wide view angle (up to 120 degrees, two or three steps)
How it works (II)Video<strong>GB</strong>-<strong>SAR</strong>SystemPowersupplyPunctualdisplacementsDisplacementmapsControl softwareGPRSradio linkGPRSGPRSMeasurement SiteNear real-timeinterferometricprocessorremotedesktopemail alertsFTPUniv. of FlorenceGPRS, cableAnywhere
The products of the interferometric analysisphase t1phase t2displacements t2-t1
The products of the interferometric analysis
The products of the interferometric analysis….
The <strong>Belvedere</strong><strong>Glacier</strong> Survey
MEASUREMENTPARAMETERSCentralFrequencyTransmittedpowerSingle scandur<strong>at</strong>ion5 GHz1 W19 minRESOLUTIONCELLRangeAzimuth7.5 m15 mrad
The <strong>Belvedere</strong><strong>Glacier</strong> SurveyMEASUREDAREATotalOn theglacier1.800.000 m 2650.000 m 226% of the totalarea of the glacier78% of the visiblearea of the glacier
The <strong>Belvedere</strong> <strong>Glacier</strong> Survey
Wh<strong>at</strong> we are measuring
Interferometric displacements sequence
Punctual displacements15/08/07 16.3031 hours16/08/07 23.30Mean velocity ~ 7 cm/day
Measurement accuracy
Daily velocities1. Sp<strong>at</strong>ial mean2. Temporal meanHumidity (%)Temper<strong>at</strong>ure (°C)Velocity (cm/day)
Digital Elev<strong>at</strong>ion Model (DEM) - 2006
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