SAR Processing and Data Analysis with SNAP 8.0 software and ESA Sentinel-1 data
ฝัง
- เผยแพร่เมื่อ 15 ต.ค. 2024
- With SNAP 8.0 software, which has been developed by Brockmann Consult Skywatch Sensar and C-S step.esa.int/m... , we look over Sentinel-1 Synthetic Aperture Radar (SAR) processing and data analysis. Here is a workflow as below:
➤ ESA SNAP 8.0 [1] [5] [10]
Open Sentinal-1 data with Intensity VH or HH
Calibrate - Radiometric Calibrate
Multilooking
Speckle Filtering - Single Product Speckle Filter
Geometric - Terrain Correction (TC) - Range-Doppler TC with Digital Elevation Model (DEM) with 90m SRTM
Intensity_HH or Intensity_HH - choose Linear to/from dB
The radar brightness (b0) of a SAR image pixel is converted to logarithmic scale b0 [dB] = 10log10(b0) [9]
➤ SAR data analysis from Sentinal-1 image
The image between HH and HV look different because of radar pulses to return either in horizon
or in vertical polarization causing inconsistent interpretation on area in northern Ontario. Returns in backscatters signal with horizontal polarization (H-pol) and vertical polarization (V-pol) indicate a degree of divergent magnitudes on surface conditions from this data analysis.
Sentinel-1 data provides a great potential for many applications such as flood monitoring, interferometry, time series analysis, and so on [2]. Google Earth Engine (GEE) also provides all products of Sentinel satellites series including Sentinel 1 [3].
There is the different Level-1 Ground Range Detected [4].
Furthermore information of SAR Land Application Tutorial [6] [7] [8]
Please subscribe to my TH-cam channel and to like my posts. Enjoy it!
➤Utilities and applications:
OBS Studio (Version 26.0.2 64bit)
Win Movie Maker (Version 8.0.7.2 purchased and registered)
Vrew 0.6.5
PIXLR (pixlr.com/)
➤ Computer and hardware used:
My laptop: amzn.to/3iStQD5
Monitor: amzn.to/3iMx1fu
Display Port (DP) to HDMI Cable: amzn.to/36VHDGE
Pin microphone: amzn.to/3di11ig
BGM: Late night drive (Nat Keefe & BeatMower) in Audio library / TH-cam Studio
➤ Accessory
Voltage Converter and Transformer, 2500 Watts: amzn.to/3f16jzx
DISCLAIMER: Links included in this description might be amazon affiliate links. If you purchase a product with the links as above, I may receive a small amount of commission. There is no additional charge to you for sure!
#datavisualization #dataanalysis #earthobservation #sarprocessing
#Sentinel1withSNAP8 #calibrate #multilooking #specklefiltering #terraincorrection
#10log10indB #SARdataanalysis #horizontalandverticalpolarization
#HpolandVpol #SARLandApplication #ESASNAP8
➤ Reference
[1] Luis Veci, Sentinel-1 Toolbox SAR Basics Tutorial, ESA, 2019
[2] step.esa.int/m...
[3] developers.goo...
[4] sentinel.esa.i...
[5] www.iceye.com/...
[6] earth.esa.int/...
[7] eo-college.org...
[8] NASA AREST: SAR Processing and Data Analysis, Session 2/4, NAVA Video on TH-cam, • NASA ARSET: SAR Proces...
[9] Schmidt, K.; Schwerdt, M.; Miranda, N.; Reimann, J. Radiometric Comparison within the Sentinel-1 SAR Constellation over a Wide Backscatter Range. Remote Sens. 2020, 12, 854, ; doi.org/10.339...
[10] earth.esa.int/...
@ 2020 by TWO & Solutions. All rights are reserved.
I am willing to share with my new knowledge about Synthetic Aperture Radar applications in future. Stay tuned!
Hello Two & Solution! Why can't my computer perform geometric correction? When I order the process, it stays in "writing target product" and does nothing. I am using a 4th generation core i7 and a 10th generation one. Greetings from Nicaragua!
Hello Guillermo; Sorry for late response. I think that it can be related to the size of RAM, or a quality of Digital Elevation Model (DEM). My laptop has 16-GB RAM but at least 32-GB RAN recommended as I heard. A few time I didn't find any results with SRTM so chose another DEM.
please make vedio on calculating refractive index on sar dem
Quick googling but I can't find how to calculate refractive index from Synthetic Aperture Radar image. This journal paper showed how to retrieve refractive index from multispectral images - www.mdpi.com/2072-4292/9/4/313/htm
which version from ANACONDA, phyton and Sen2cor do you install? Please
Greeting. I didn't apply to any python nor Sen2cor - only with SNAP 8.0 software for SAR processing.
hi two & solutions, i want to asking why my apllication snap cant open intensity or amplitude in bands? please answer my questions. Thankyou :)
Hi Nikmah Fitria; I would suggest checking if you have Sentinel-1 raw data with EW_GRDM format. Secondly, on a step of Terrain Correction (TC), if your DEM covers sufficiently your Region of Interests. In third, please check a step including *Intensity_HH* - choose *Linear to/from dB*. Otherwise, you may find an answer from one of reference in the description of this TH-cam video ABOVE.
hi, i have meet an error, Dimap header file failed to read, what does it mean?
Thanks for your question. It sounds like an issue of different Sentinel 1A or 1B products at Level-1 SLC, or Level-1 GRD. It might be useful to look over the link on ESA website or step forum as following:
- sentinels.copernicus.eu/web/sentinel/missions/sentinel-1/data-products
- forum.step.esa.int/t/cant-open-safed-dim-files-in-snap-error-angle-is-too-high/4938
Can we do moon"s analysis on it
Yes or no. As long as we have a RADAR image collected from the Moon's surface, we could do data analysis. I didn't see a type of RADAR image on Moon rather than optical image to the public.
@@TWOandSolutions If we have sar data of lunar surface can you tell us Or share any such link through which we can do SAR image processing through SNAP
It might be interesting for you - www.nasa.gov/mission_pages/Mini-RF/news/2009-01-16_radar_first_look.html It looks like no longer to access to ISRO/Chandrayaan mission website - www.isro.org/Chandrayaan
@@TWOandSolutions thanks🙏 I'll look into it