Pre-processing and Geometric Correction of a RADARSAT Imagery Using SNAP

Pre-processing and Correction of RadarSAT Imagery Using SNAP

Learning Outputs: 

1. Pre-processing of RadarSat image

2. Enhancement of the image

3. Geometric correction 

4. Export to GeoTIFF 

Procedure:

1.Open: File > Open Product > Open .dim File

2. Calibration: Radar > Radiometric > Calibrate > I/O Parameters > Source Product > Source  > Select Input File > Processing Parameters > Polarization > VV/VH > Run

3. Image Enhancement: Radar > Speckle Filtering > Single Product Speckle Filtering > I/O Parameters > Source Product > Source  > Select Input File > Processing Parameters > Source Bands > Select Input File > Filter > Lee > Run

4. Band Maths: Raster > Band Maths > Target Product > Select Input File > Name > Give a File Name > Edit Expression > Expression > Clear > 255 * (Select Input File < .01) > Ok > Ok

5. Geometric Correction: Radar > Geometric  >  Terrain Correction > Range-Doppler Terrain Correction > I/O Parameters > Source Product > Source  > Select Input File > Processing Parameters > Source Bands > Select Input File > DEM > SRTM 1 Sec HGT (Auto Download) > DEM Resampling Method > Nearest Neighbour > Ok 

6. Export: File > Export > GeoTIFF > Output File Name > Ok 

Practice Data Download Link

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About Nurullah Opu

Imagine a workaholic, a curious person and a perfectionist, and the combination of three defines me how I am. Being born in the old skirt of Dhaka city, Bangladesh. I was raised in a competitive, practical life which has shaped me what I am today. Master's student, in University of Dhaka, one of the oldest, top ranked public university in Bangladesh. Majoring in Physical Geography and Environment, I see myself as a future data analyst having expertise in geo-spatial technology. So, from student life, I have practiced and earned handful experiences on spatial technology. ArcGIS Desktop, QGIS, Erdas Imagine, ENVI, ILWIS and SPSS are my preferred software to work on. Experiences on GIS programming with Python, Leaflet and Development in some ArcGIS platforms and also creating websites and blogs with great UX and UI design. My designs to be checked on the portfolio and blog section of my personal website (www.nurullahopu.ml). Reach out if you'd like contact me for any queries.