Although there are some RADAR based sensors out there which are quite helpful in Emergency and Disaster Response situation, they are not freely available. Now it seems Sentinel-1 is the first one which I know is free! The answer to a cloud free day and night Satellite Imagery is finally here. I would like to know how Sentinel-1 C-band Synthetic Aperture Radar (SAR) which builds on European Space Agency’s and Canada’s heritage SAR systems on ERS-1, ERS-2, Envisat and Radarsat can be used for Natural Hazards and Disaster Risk Management, especially in Flood situations.
'Sentinel-1 carries an advanced radar instrument to provide an all-weather, day-and-night supply of imagery of Earth’s surface. As a constellation of two satellites orbiting 180° apart, the mission images the entire Earth every six days. The mission will benefit numerous services. For example, services that relate to the monitoring of Arctic sea-ice extent, routine sea-ice mapping, surveillance of the marine environment, including oil-spill monitoring and ship detection for maritime security, monitoring land-surface for motion risks, mapping for forest, water and soil management and mapping to support humanitarian aid and crisis situations.'
Kindly support your answers with relevant research papers.
In response to Bhuvana's comment: for many applications and users the L2 is not the most interesting product. The L1 Single Look Complex (SLC) product is more interesting because it allows us to exploit the interferometric capabilities of S-1 AND we can radiometrically correct using high resolution DEMs. SLC data is not widely available during the ramp-up phase but will become available as S-1 becomes fully operational.
The only case I know so far is the monitoring of a flood in namibia:
http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Sentinel-1/Sentinel-1_aids_response_to_Namibia_flood
I think it is a bit too early for scientific papers, as the data is just available for the public for two month and even distributed with this limitation:
"The Sentinel-1 Level-1 products are preliminary qualified, in particular products are not radiometric calibrated. Operational product qualification, including absolute radiometric calibration, will continue during the next period"
(scihub.esa.int)
There are more than one natural hazards and the question should be a bit more specific, even though any SAR system can be effectively used to monitor and used as a means to mitigate the disaster. For example, monitoring earthquakes or tsunami is quite different from monitoring of flood.
Hi
At IREA of Italian National Research Council we are now working on it. There's a team of scientists involved in such an activity. If you need to have additional info you may send an email to one of my colleagues who are now working in Naples.
[email protected], [email protected]
As far as I know, also, in a few months some public codes will be delivered to scientists by ESA.
Christoph, you are right. Too early to expect a research paper. Thanks for your answer anyway. Apart from the floods in Namibia, Serbia and Kashmir I did not find any other either.
Dr. Moon, thanks for asking for clarifying the question. I meant in the context of floods.
http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Sentinel-1/Sentinel-1_aids_response_to_Namibia_flood
http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Sentinel-1/Sentinel-1_aids_Balkan_flood_relief
https://www.disasterscharter.org/web/guest/activations/-/asset_publisher/fmpRVvSW3UIw/content/flood-and-landslide-in-pakistan?redirect=https%3A%2F%2Fwww.disasterscharter.org%2Fweb%2Fguest%2Factivations%3Fp_p_id%3D101_INSTANCE_fmpRVvSW3UIw%26p_p_lifecycle%3D0%26p_p_state%3Dnormal%26p_p_mode%3Dview%26p_p_col_id%3Dcolumn-1%26p_p_col_count%3D1%26_101_INSTANCE_fmpRVvSW3UIw_advancedSearch%3Dfalse%26_101_INSTANCE_fmpRVvSW3UIw_keywords%3D%26_101_INSTANCE_fmpRVvSW3UIw_delta%3D5%26_101_INSTANCE_fmpRVvSW3UIw_cur%3D2%26_101_INSTANCE_fmpRVvSW3UIw_andOperator%3Dtrue
Hi James i was interested too on working Sentinal-1A data in ocean applications but when i have enquired about the same to the Sentinal Team , i got the reply as follows
Sentinel-1 is currently in the Operational Ramp-Up Phase and as such Level-1 products are available to users as preliminary calibrated.
Level-2 products have not been qualified yet and therefore have not been released.
You can find updates on the operational status of Sentinel-1 here https://sentinel.esa.int/web/sentinel/missions/sentinel-1/mission-status and details of the phase here https://sentinel.esa.int/web/sentinel/missions/sentinel-1/data-distribution-policy/operations-ramp-up-phase
so i think we have to wait some more time to get the radiometrically and geometrically corrected data to work and make research out of the data. Hope this information helps
Dr. Pepe thanks a lot for providing the contacts. I will surely get in touch with them.
Bhuvana thanks for the updates and the links. I guess we have to just wait for the L2.
In response to Bhuvana's comment: for many applications and users the L2 is not the most interesting product. The L1 Single Look Complex (SLC) product is more interesting because it allows us to exploit the interferometric capabilities of S-1 AND we can radiometrically correct using high resolution DEMs. SLC data is not widely available during the ramp-up phase but will become available as S-1 becomes fully operational.
Now I'm research Sentinel-1 data (IW mode) for change detection of vegetation. But I don't how to calibration the multitemporal Sentinel-1 data. Do you know the best of calibration method?
Is there any update of the radiometrically and geometrically corrected form of Sentinel-1 data ? Thank for the any information.
Mustafa,
For what attains data products directly provided by ESA, I do not have any news. We, as a group of scientists in Napoli, have the calibration of S1 data as one of the issues on which to work on. At the moment, even if SLC data are made available by ESA, we have just finalized the development of a software for the focusing of SAR images and the next is just the calibration.
We'll keep in touch in these next months to see what is going to happen by ESA and by us.
Cheers and have a good life in Istanbul
See you
Antonio
Dear Antonio
Thank you for your kind & quick answer and your collaboration.
Many friendly greetings to Napoli from Istanbul.
Regards
Mustafa
Dear Mustafa,
check out this very useful page about SAR remote sensing. It contains material for theory, applications, practical examples as well as training data, all based on creative commons license. I've never seen anything better as an introduction to SAR remote sensing.
https://saredu.dlr.de/
Best also from Rome to Istanbul :)
Andreas
Dear Andreas
The links and information there look amazing. Thanks
Greetings to Rome :)
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