NASA’s Largest Satellite Antenna Ever Has Just Unfurled in Space

Satellite There are “flowers” in the outer space, in the orbit, the largest radar antenna in the orbit is revealed to reveal the image. The NASA-Eiso Cynthetic Aperture Radar (NEAR), a joint project between the US Space Agency and the Indian Space Research Organization (ISRO), was launched on July 30, before its full -scale spread from the Satish Dhawan Space Center in southeast India.

The spacecraft is now ready to observe the Earth’s full-scale and will use radar to track our planet surface changes in unprecedented resolution. It can record crustal deformation caused by ice sheets and glaciers, earthquakes and landslides, and changes in forest and wetland ecosystems can record a few centimeters of accuracy for certain types of terrain. The goal is to help make decisions in a wide range of cases including disaster response for NISAR data, infrastructure, agricultural policies and food security.

“The successful deployment of Nissar’s image has been identified as an important milestone in the Satellite’s capacity,” said Karen Saint -Germain, director of the NASA headquarters. StatementThe

A satellite with two eyes

Nisser’s Antona Reflecter – The device that uses to send and receive radar signals – crosses 39 feet, produces as the largest device in NASA orbit. Made from the mesh of gold plated wire, the reflector was connected to the satellite like a folding umbrella. In the next four days of the launch, the satellite slowly expanded its boom, before the antenner frame, which was held under excitement, was published on August 15, allowing the reflector In full form of “Bloom”The

Nisar is the first satellite that carries two types of synthetic aperture radar, or SAR: L-Band and S-Band. Former crustal deformation and ice sheet enters the canopy and clouds to detect the movement of the ice. S-band is sensitive to humidity in snow cover and vegetation changes. By combining these two, it is possible to record a versatile record of various events from earthquakes and volcanic activities to forests. The giant reflection serves as a “eye” that is essential for both systems, when the infected radar is taken down to the Earth and focuses on these signals when returning to the satellite.

“Synthetic aperture radar, in principle, acts like a camera lens, which focuses on the light to create a sharp figure. The lens size of the aperture determines the figure of the image,” Nisser’s project scientist Paul Rosen says in the Jet Propulsion laboratory. StatementThe “Nissa researchers and data users are enabled to create 3D films on the surface of the earth by using special interferometric techniques that compare images over time.”

NASA and ISRO engineers are working on the antenna installation. It took about 37 minutes to eradicate the reflector.

Photograph: NASA/JPL-Cultek

Decade of technology

NASA Jet Propulsion Laboratory 1 has been developing radars for satellites since the 1970s, in 1970, the world’s first ocean observation satellite, introduced beaches and published in Venus’s cloud-covered surface surface with Magellan in the 9th decade.

The final of the knowledge acquired for decades, a product of both the United States and Indian technology: NASA provided L-Band SAR and data communication equipment, while India’s ISRO SAR and satellite buses were responsible for the SAR-Bus-which operates in infrastructure, communication and satellite orientation. The Israan ground station was responsible for the introduction and primary activities, and experts in both countries worked together to monitor the activities of deployment.