Interferometric Synthetic Aperture Radar (IFSAR or InSAR) is a remote sensing method that exploits phase differences between two or more coherently acquired SAR images to derive precise topographic and surface deformation information. Using either single-pass (across-track baseline) or repeat-pass geometries, IFSAR forms an interferogram from complex SAR data, from which relative phase is unwrapped and converted to line-of-sight height or displacement through known radar geometry and baseline vectors. The method requires accurate calibration, coregistration, and error mitigation (e.g., atmospheric phase delay, decorrelation), and is widely employed for digital elevation model generation and geodetic-scale deformation monitoring.
Billed as the first comprehensive report on the state of U.S. lands, water, and wildlife, the Nature Record National Assessment includes the decline of butterfly populations and other species to the remarkable comeback of ...
Environment
Mar 28, 2026
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Cornell scientists have engineered E. coli to act as a sensitive biosensor for monitoring environmental arsenic, a toxic pollutant most notably found in rice paddies in Southeast Asia. Their new study provides a proof of ...
Cell & Microbiology
Mar 23, 2026
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Sharks are often viewed as solitary, but a new study—carried out on the Shark Reef Marine Reserve in Fiji—has found that rather than mixing at random, bull sharks have "active social preferences" and choose their social partners. ...
Plants & Animals
Mar 16, 2026
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Climate change has caused some tropical plants to flower earlier or later than they used to; in some cases by a matter of weeks or even months, according to a study of 8,000 flowers across more than two centuries, published ...
Plants & Animals
Feb 25, 2026
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Across large parts of northern Tanzania, gully erosion—soil erosion caused by flowing water—is cutting deep scars through fertile farmland, grazing areas, roads and even villages. These gullies grow faster every year and ...
Ecology
Jan 31, 2026
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Human health risks from direct consumption of toxic nanoplastics are already scary, but researchers have confirmed that nanoplastics in water give rise to an additional threat: They strengthen bacteria.
Ecology
Jan 26, 2026
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A critique from a team led by Utah State University ecologist Dan MacNulty and published in Forest Ecology and Management has prompted a formal correction to a high-profile study on aspen recovery while raising broader questions ...
Plants & Animals
Jan 22, 2026
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Most people can imagine why a shrinking Great Salt Lake would mean unhealthy dust storms for the Wasatch Front, or why refilling the lake through water conservation could reduce dust exposure. Now, there is a data-based modeling ...
Earth Sciences
Jan 16, 2026
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From pollinating flowers to enabling decomposition and supporting nutrient cycles, insects' abundance and biodiversity are critical for maintaining healthy ecosystems. However, recent studies showing population declines have ...
Plants & Animals
Sep 11, 2025
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The global scuba diving tourism industry generates up to around $20 billion US per year, finds a study published in Cell Reports Sustainability. This revenue helps boost local economies by employing local people and supports ...
Ecology
Jul 25, 2025
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