{"id":136484,"date":"2026-07-24T08:18:07","date_gmt":"2026-07-24T08:18:07","guid":{"rendered":"https:\/\/mailinvest.blog\/index.php\/2026\/07\/24\/radar-signals-from-us-india-nisar-satellite-turns-an-antarctic-peak-into-a-hummingbird\/"},"modified":"2026-07-24T08:19:06","modified_gmt":"2026-07-24T08:19:06","slug":"radar-signals-from-us-india-nisar-satellite-turns-an-antarctic-peak-into-a-hummingbird","status":"publish","type":"post","link":"https:\/\/mailinvest.blog\/index.php\/2026\/07\/24\/radar-signals-from-us-india-nisar-satellite-turns-an-antarctic-peak-into-a-hummingbird\/","title":{"rendered":"Radar Signals from US-India NISAR Satellite Turns an Antarctic Peak Into a Hummingbird"},"content":{"rendered":"

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\"Radar
Picture credit score<\/strong>: NASA\/JPL-Caltech<\/span>
Radar indicators from the joint US-India NISAR satellite<\/a> have mapped a mountaintop in East Antarctica that kinds a transparent hummingbird form as soon as the information is processed into shade. Scientists on the mission nicknamed the outcome \u201cthe hummingbird\u201d nearly as quickly because the picture appeared.<\/p>\n


\"Radar
Nunatak Zaterjavshijsja is a granite mountain in East Antarctica\u2019s Prince Charles Mountains that rises from the encompassing ice sheet roughly 40 kilometers southwest of Mount Newton. A glacier lumbers previous this obstacle on its journey northeast to the ocean. The pressure of the mountain causes the ice to pressure and bend, ultimately forming deep cracks within the floor referred to as crevasses.<\/p>\n

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    \nNISAR\u2019s L-band radar collected observations in August 2025, when the satellite tv for pc was nonetheless being examined. It operates by transmitting microwaves in direction of the floor, which have horizontal polarization, and recording what comes again. Surfaces that bounce the sign again with the identical route because it was despatched seem in magenta, which is the smoothest sort of ice. Something that returns with a modified polarization of the sign or scatters after getting into the ice registers as inexperienced. These greens distinguish the faces of crevasses and different irregular buildings. The place each kinds of indicators come again strongly, you get white.<\/p>\n

    \"Radar
    When the completed picture is considered, the height kinds a vibrant, oval middle with a darker part smack within the center, just like an eye fixed. Effective inexperienced strains radiate from the highest and backside of the core in patterns resembling feathers or wings. A protracted skinny inexperienced chunk extends away from the oval, giving it a pointed beak look. The ice stream that continues to go northeast turns into the tail of the entire thing. Magenta fields encompass the smoother areas of the fractured zone, whereas the deepest cracks gentle the brightest inexperienced.<\/p>\n

    Seongsu Jeong, a sign evaluation engineer at NASA\u2019s Jet Propulsion Lab who produced the picture, defined that the radar can look previous the snow and into the ice, revealing options that optical sensors can not detect. A Landsat 9 picture of the identical area obtained in November 2025 is sort of completely white, with simply weak traces of a mountain present.<\/p>\n