The NASA-ISRO SAR Mission (NISAR) will provide flood forecasting capabilities through the use of synthetic aperture radar (SAR) to measure changing water levels in flooded areas. NISAR will augment sparse networks of stream gauges by providing continuous maps of water level changes from SAR images. These maps can indicate how much water levels have increased or decreased between observations days or weeks apart. Flood forecasting from NISAR data can help save lives and property by informing communities of incoming floods and their expected severity.
1) Radar observations from the NISAR satellite mission can help monitor volcanoes by measuring surface deformation caused by underground magma movement, which can indicate future eruptions.
2) Volcanic eruptions produce hazards like ash falls, lava and mudflows that can damage property and infrastructure as well as gases that harm health and the environment.
3) The NISAR mission will image nearly the entire land and ice masses of Earth with radar every 4-6 days at 5-10 meter resolution to track subtle changes and provide data for resource management and disaster response within hours.
The NISAR mission will use radar imaging to measure changes in groundwater levels and land subsidence globally. Over-pumping of groundwater can cause the land surface to sink as aquifers compact. This subsidence damages infrastructure and aquifer systems. NISAR's radar can map subtle changes to the land surface from space with millimeter accuracy to monitor groundwater usage and recharge. This will help manage water resources worldwide as climate change and population growth increase stress on freshwater supplies.
NISAR
Oil, Gas, and Water Underground Reservoirs
NASA
National Aeronautics and Space Administration
NASA-ISRO Synthetic Aperture Radar (NISAR)
By
Dr. Pankaj Dhussa
The NASA-ISRO SAR Mission (NISAR) will provide flood forecasting capabilities through the use of synthetic aperture radar (SAR) to measure changing water levels in flooded areas. NISAR will augment sparse networks of stream gauges by providing continuous maps of water level changes from SAR images. These maps can indicate how much water levels have increased or decreased between observations days or weeks apart. Flood forecasting from NISAR data can help save lives and property by informing communities of incoming floods and their expected severity.
1) Radar observations from the NISAR satellite mission can help monitor volcanoes by measuring surface deformation caused by underground magma movement, which can indicate future eruptions.
2) Volcanic eruptions produce hazards like ash falls, lava and mudflows that can damage property and infrastructure as well as gases that harm health and the environment.
3) The NISAR mission will image nearly the entire land and ice masses of Earth with radar every 4-6 days at 5-10 meter resolution to track subtle changes and provide data for resource management and disaster response within hours.
The NISAR mission will use radar imaging to measure changes in groundwater levels and land subsidence globally. Over-pumping of groundwater can cause the land surface to sink as aquifers compact. This subsidence damages infrastructure and aquifer systems. NISAR's radar can map subtle changes to the land surface from space with millimeter accuracy to monitor groundwater usage and recharge. This will help manage water resources worldwide as climate change and population growth increase stress on freshwater supplies.
NISAR
Oil, Gas, and Water Underground Reservoirs
NASA
National Aeronautics and Space Administration
NASA-ISRO Synthetic Aperture Radar (NISAR)
By
Dr. Pankaj Dhussa
TU2.L10 - THE AQUARIUS/SAC-D MISSION OVERVIEWgrssieee
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Flood risk mapping using GIS and remote sensing and SARRohan Tuteja
This document summarizes a presentation on using synthetic aperture radar (SAR) data from RADARSAT-1 to map flooding in Kendrapara District, India. SAR data from four dates in September 2008 were used to map the spatial extent and temporal progression of flooding over time. Traditional flood mapping methods are time-consuming and difficult during floods, while SAR data can penetrate clouds and capture flooding regardless of weather conditions. The methodology involved preprocessing the SAR data, removing noise, correcting geometrically, and classifying images to map flooding and analyze how floodwaters spread over the four dates. Peak flooding occurred on September 22nd, affecting over 37,400 hectares. The results demonstrate how SAR data can effectively monitor flooding and inform disaster response
Remote sensing via satellite provides opportunities to fill information gaps for sustainable water management. Recent developments in satellite technology, such as the Sentinel missions, allow for more accurate monitoring of surface water resources. Remote sensing can estimate variables like precipitation, evaporation, soil moisture, and water levels that support applications like flood forecasting and irrigation management. However, challenges remain in validating remote sensing data and building local technical capacity.
NISAR will observe land and ice surfaces globally every 6 days on average over 3 years to measure changes related to glaciers, earthquakes, and volcanoes. It uses synthetic aperture radar (SAR) imaging, which produces high-resolution images by emitting and recording electromagnetic signals. NISAR is a joint NASA-ISRO Earth observation mission planned to launch in 2023, with NASA providing the L-band SAR instrument and ISRO providing the spacecraft and S-band SAR. The mission aims to track subtle changes in the Earth's surface to further understand processes like glacier flow and groundwater supplies.
The document discusses the history and applications of microwave remote sensing. It began with US military research after World War II and studies by NASA in the 1960s to use microwave technology for earth observation. Key developments included airborne and spaceborne sensors to measure surface scattering properties and models to explain microwave interactions with natural targets. Current applications of microwave remote sensing include weather monitoring, navigation, imaging, and mapping for both civilian and military uses.
Remote sensing is the collection of information about Earth's surface without direct contact. It uses sensors on satellites and aircraft to detect and measure electromagnetic radiation reflected or emitted from objects. There are two types of remote sensing - active uses sensors that emit energy like radar, while passive detects natural energy like sunlight. Applications include monitoring agriculture, forestry, geology, oceans, and the environment. NASA operates many satellites that use different parts of the electromagnetic spectrum to analyze features and changes on Earth.
The document discusses the NISAR mission, a joint NASA-ISRO satellite that will use synthetic aperture radar to monitor global agriculture. NISAR will provide maps of crop areas around the world every two weeks to help organizations track food production trends and guide policy decisions. The frequent and reliable radar observations throughout growing seasons can identify crop types and growth stages. This will help predict regional crop health and outputs to support global food security.
DELINEATION OF LANDSLIDE AREA USING SAR INTERFEROMETRY AND D-INSAR :A CASE ST...SUJAN GHIMIRE
Surface displacement refers to the movement of the Earth's surface, either vertically or horizontally, due to natural or human-induced factors (Tomás et al., 2014). It can lead to a wide range of hazards such as landslides, earthquakes, and subsidence, which can cause significant damage to infrastructure and property, as well as threaten human lives.The results of this study contribute to a comprehensive understanding of surface displacement dynamics in the district. The integration of D-InSAR and SAR imagery analysis enables the identification of high-risk areas prone to hazards. This information is crucial for local authorities and disaster management agencies in developing effective early warning systems and implementing appropriate mitigation measures.
The findings of this study provide valuable insights into surface displacement in the Sindhupalchowk district using SAR imagery and D-InSAR techniques. The combination of these advanced remote sensing tools offers a powerful approach for monitoring geohazards and mitigating risks. The outcomes of this research can aid in land-use planning, infrastructure development, and disaster risk reduction strategies, ultimately contributing to the safety and well-being of the local population.
The document summarizes two seminar presentations that used InSAR techniques to analyze land subsidence in Beijing, China and the Perth Basin in Australia. In Beijing, InSAR detected 790 mm of cumulative subsidence over 8 years, with rates comparable to GPS data. Subsidence correlated with over-exploitation of groundwater. In the Perth Basin, Sentinel-1A detected subsidence up to 15 mm/year over broad areas and 20 mm/year locally, agreeing with independent TerraSAR-X data and indicating seasonal groundwater impacts. Both studies demonstrated InSAR's ability to detect small subsidence magnitudes and would benefit from considering human impacts.
Learn from the National Aeronautics and Space Administration (NASA) about what their modeling and forecasting says about current and future weather patterns, and the impacts these patterns will have on agriculture, food security, climate, natural disasters, and more, especially for the Southeast.
WE3.L10.4: KIYO TOMIYASU, CO-SEISMIC SLIP AND THE KRAFLA VOLCANO: REFLECTIONS...grssieee
This document discusses the use of Interferometric Synthetic Aperture Radar (InSAR) for measuring surface deformation over time. It summarizes Kiyo Tomiyasu's pioneering work on using InSAR from a geosynchronous orbit. It also presents a new method called MInTS that uses wavelet decomposition and physical parameterization to generate continuous deformation time series from large numbers of InSAR images. MInTS is demonstrated on data from Iceland's Northern Volcanic Zone, showing instantaneous velocities and asymmetries in deformation patterns. Finally, the document proposes a concept for a geosynchronous InSAR constellation that could provide near-continuous coverage of the Earth's surface.
This document discusses how satellite technology can support marine spatial planning (MSP). It examines current satellite capabilities for monitoring the marine environment and how they may improve over the next 15-20 years. While satellite data has limitations in spatial/temporal resolution and coverage, emerging technologies are combining to offer more valuable data for MSP. Satellite communication, positioning, ocean color imaging, synthetic aperture radar, and altimetry can all provide useful data when integrated, though no single method provides all needed information. Future trends may help address current limitations in resolution, coverage, and data accessibility.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
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Remote sensing via satellite provides opportunities to fill information gaps for sustainable water management. Recent developments in satellite technology, such as the Sentinel missions, allow for more accurate monitoring of surface water resources. Remote sensing can estimate variables like precipitation, evaporation, soil moisture, and water levels that support applications like flood forecasting and irrigation management. However, challenges remain in validating remote sensing data and building local technical capacity.
NISAR will observe land and ice surfaces globally every 6 days on average over 3 years to measure changes related to glaciers, earthquakes, and volcanoes. It uses synthetic aperture radar (SAR) imaging, which produces high-resolution images by emitting and recording electromagnetic signals. NISAR is a joint NASA-ISRO Earth observation mission planned to launch in 2023, with NASA providing the L-band SAR instrument and ISRO providing the spacecraft and S-band SAR. The mission aims to track subtle changes in the Earth's surface to further understand processes like glacier flow and groundwater supplies.
The document discusses the history and applications of microwave remote sensing. It began with US military research after World War II and studies by NASA in the 1960s to use microwave technology for earth observation. Key developments included airborne and spaceborne sensors to measure surface scattering properties and models to explain microwave interactions with natural targets. Current applications of microwave remote sensing include weather monitoring, navigation, imaging, and mapping for both civilian and military uses.
Remote sensing is the collection of information about Earth's surface without direct contact. It uses sensors on satellites and aircraft to detect and measure electromagnetic radiation reflected or emitted from objects. There are two types of remote sensing - active uses sensors that emit energy like radar, while passive detects natural energy like sunlight. Applications include monitoring agriculture, forestry, geology, oceans, and the environment. NASA operates many satellites that use different parts of the electromagnetic spectrum to analyze features and changes on Earth.
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Surface displacement refers to the movement of the Earth's surface, either vertically or horizontally, due to natural or human-induced factors (Tomás et al., 2014). It can lead to a wide range of hazards such as landslides, earthquakes, and subsidence, which can cause significant damage to infrastructure and property, as well as threaten human lives.The results of this study contribute to a comprehensive understanding of surface displacement dynamics in the district. The integration of D-InSAR and SAR imagery analysis enables the identification of high-risk areas prone to hazards. This information is crucial for local authorities and disaster management agencies in developing effective early warning systems and implementing appropriate mitigation measures.
The findings of this study provide valuable insights into surface displacement in the Sindhupalchowk district using SAR imagery and D-InSAR techniques. The combination of these advanced remote sensing tools offers a powerful approach for monitoring geohazards and mitigating risks. The outcomes of this research can aid in land-use planning, infrastructure development, and disaster risk reduction strategies, ultimately contributing to the safety and well-being of the local population.
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NISAR NASA-ISRO Synthetic Aperture Radar (NISAR) Levees and Dams
1. ã2017 California Institute of Technology. Government sponsorship acknowledged.
NISAR: The NASA-ISRO SAR Mission
Levee and Dam Monitoring from Earth Orbit
The U.S. is protected by tens of thousands of miles of
levees and hundreds of dams, most of which were built in
the last century. This aging infrastructure requires both
routine monitoring and maintenance and intensive survey
following stress from floods or earthquakes. Today, by and
large, the integrity of the dams and levees is determined
from visual inspections made by experienced personnel
from vehicles or on foot, infrequent ground-based land
elevation survey of small sections, and very limited semi-
permanent instruments installed in-ground.
Levees and Dams: Flood
Defense for U.S. Communities
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requires constant vigilance. Radar remote sensing with NISAR can provide
early warning of movement and seepage in time to prevent disaster.
Dams & Levees: Flood Prevention, Water
Conservation, Energy Generation, and Sports
and Recreation
Levees and dams serve multiple functions besides their primary
function of flood prevention. Dams provide hydroelectric power,
store and protect the water supply, and provide recreation areas
where people relax, and where fish, birds, and game live and breed.
Levees don’t just keep water from inundating the land, but also
channel water to communities and businesses where it is needed.
Monitoring levees and dams is time-consuming and personnel
intensive, causing infrequent monitoring of most areas. Remote
sensing with NISAR can increase inspection, imaging the entire U.S.
several times a month regardless of season, light, and weather, to
detect changes before they become disasters.
The NISAR Mission – Reliable, Consistent Observations
The NASA–ISRO Synthetic Aperture Radar (NISAR) mission, a collaboration
between the National Aeronautics and Space Administration (NASA) and the
Indian Space Research Organization (ISRO), will provide all-weather, day/night
imaging of nearly the entire land and ice masses of the Earth repeated 4-6 times
per month. NISAR’s orbiting radars will image at resolutions of 5-10 meters to
identify and track subtle movement of the Earth’s land and its sea ice, and even
provide information about what is happening below the surface. Its repeated set
of high resolution images can inform resource management and be used to detect
small-scale changes before they are visible to the eye. Products are expected to
be available 1-2 days after observation, and within hours in response to disasters,
providing actionable, timely data for many applications.
Photos (clockwise): California DWR, USACE, USACE, NASA/JPL-Caltech
S
2. ã2017 California Institute of Technology. Government sponsorship acknowledged.
Continued from front page
NISAR: The NASA-ISRO SAR Mission
Modern radar remote sensing methods can revolutionize
the way that levee and dams are monitored, significantly
increasing the spatial coverage, frequency of
measurement, and consistency of the observation
methods. Remote sensing can improve upon and augment
the traditional methods of detecting slope failures,
subsidence, and seepage, all of which are indicators of the
health of the infrastructure.
Instead of determining ground movement from a change
in two or more measurements of elevation, it is possible
using NISAR to measure surface movement directly
without knowledge of absolute surface elevation. The
technique used to measure ground displacement relies
upon repeat imaging of an area with a high-resolution
synthetic aperture radar (SAR) instrument and performing
a specific type of processing known as interferometry
(InSAR). This technique measures changes in the distance
between the radar antenna and the ground along the
direction of radar illumination, at the scale of a fraction of
the radar wavelength, which for NISAR is 24 cm. Synthetic
aperture radar interferometry is a remote sensing method
that can be used to measure surface deformation directly
across large areas at one time with far greater accuracy
than is possible with traditional ground-based leveling
surveys or LiDAR differencing. Radar has additional
advantages over those methods, including the ability to
see through clouds, smoke, and haze, and to image the
surface day or night without relying on solar illumination.
SAR can also be used to detect developing seeps through
changes in soil moisture, which can be very useful during
flood response where no baseline, pre-flood imagery is
available.
NASA’s space-based Earth observing radar instrument will
be an effective tool for both long-term failure mitigation
and short-term rapid response in emergency situations.
Using NISAR, we can apply advanced technology to
protecting levees and dams in the U.S. through frequent,
repeated and consistent imaging. Space-based resources
such as this could be routinely used to guide decision-
makers and commercial interests alike in order to more
effectively and efficiently target repair and upgrades.
National Aeronautics and Space Administration For more information, visit http://nisar.jpl.nasa.gov/applications
Jet Propulsion Laboratory / California Institute of Technology / Pasadena, California / www.jpl.nasa.gov
Map showing rate of ground movement along one of the levees that
prevents flooding of an island in the Sacramento-San Joaquin Delta
[Deverel 2016]. The inset photo shows a view looking east towards the
area of most rapid movement (red/orange color). The signal, clearly
visible to the radar, is not obvious to an observer on the ground.
Radar-based Measurement of Levee Conditions
Observations of the Earth’s land surfaces from space using active
microwave sensors enable reliable and repeated measurements to
be made throughout the year, building up a baseline set of
observations that show typical change in the general vicinity of
flood protection structures (e.g., dams, levees, spillways) from
which abnormally large localized movement or rapidly changing
parts of the structures can be identified. Information like this is
used to quantify the status of all levees and dams that are imaged
from space, both in urban communities and remote from populated
areas. This valuable information will enable smart targeting of
resources for maintaining dams and levees, and will provide rapid
reassessment of their health following a stressor event, such as
increasing flood water level, earthquakes, or human-initiated
threats.
Shown at right is a land movement map derived from images
acquired by UAVSAR, the NASA airborne instrument that is the
prototype for NISAR. These data were collected to develop new
remote sensing methods for levee monitoring, and are being
actively used today to target ground observations and levee repair
and to prepare for emergency response to levee breaks in the
future.