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IDL routine for Hot-Spot detection and effusion rate estimation

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Presentazione sul tema: "IDL routine for Hot-Spot detection and effusion rate estimation"— Transcript della presentazione:

1 IDL routine for Hot-Spot detection and effusion rate estimation
UseRest Napoli 2008

2 antenna Local system PC scrub directory 1 AVHotRR Effusion Rate Raid
WEB, image gallery antenna Local system PC scrub directory 1 Raw data processing: Calibration Crop and Projection Permanent Archive Raid Storage Data Save data Processed in directory Srub 2 AVHotRR Effusion Rate

3 AVHotRR System INPUT: files HDF in temperatura o radianza
Auxiliary data: Emissivity Background Temperature Azimuth Angle (optional) OUTPUT: Lava Temperature Lava surface Thermal flux Effusion rate

4 Thermal model Issues Identification of the thermal anomaly (Alert)
(Tb) Lava Background (Tb) Tlava = Tc + Th flava Tlava Tb -> a-priori ! Issues Identification of the thermal anomaly (Alert) Dual-band constrains The effusion rate estimation

5 Hot-Spot Detection Lombardo et al., 2004 (J. Volcanol. Geotherm. Res.)
ch n15.hdf ch4

6 Dual-band constrains: Tb
Etna crater area is characterized by quite homogeneous basaltic coverage

7 Dual-band constrains: Tb

8 Auxiliary Data: Tb Misure di campagna con stazioni meteo
Analisi di pixel adiacenti omogenei non radianti

9 Pixel quality check Acceptable solutions for Tlava and hlava in the Tb range GOOD Tlava and hlava trends associated to NO GOOD

10 Lava, cloud, and saturation masks

11 Alert

12 Effusion rate time series

13 Conclusions AVHRR data provide useful information for volcano thermal monitoring. The routine AVHotRR is a robust tool for hot-spot detection and effusion rate estimation AVHotRR has been tested during the 2006 and the ongoing 2008 Etna eruptions providing thermal parameters in Near Real Time THANK YOU!


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