Em 17 de março de 2013, o Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) da NASA colheu dados de abertura sintética sobre o Rio Napo, no Equador e Peru. As cores da imagem indicam a probabilidade de inundação (alagamento) sob a cobertura da floresta, o que é difícil de determinar com o uso de sensores ópticos tradicionais.
Os tons de amarelo e vermelho indicam uma alta probabilidade de água parada com vegetação emergente, enquanto os de azul e verde representam áreas menos sujeitas a inundações, e o preto indica as áreas de águas abertas do Rio Napo.
Esses dados, que já foram transmitidos a uma equipe de campo que trabalha ao longo do Rio Napo, serão usados para guiar medições em campo durante uma segunda observação do UAVSAR em 31 de março de 2013. A imagem é um segmento de 14 km de largura por 9 km de comprimento de uma imagem medindo mais de 200 quilômetros de comprimento. O norte está próximo àdireita, no alto. A resolução é de 6 metros.
Dados do UAVSAR como estes estãoajudando cientistas a avaliar a eficácia do uso de dados de radar de abertura sintética no estudo da dinêmica das inundações deste rio e de outros similares em todo o mundo.
On March 17, 2013, NASA’s Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) acquired synthetic aperture radar data over the Napo River in Ecuador and Peru.
The image colors indicate the likelihood of inundation (flooding) beneath the forest canopy, which is difficult to determine using traditional optical sensors. Red and yellow shades indicate a high likelihood of standing water with emergent vegetation, blue and green shades are areas less likely to be inundated, and black indicates the open water areas of the Napo River.
These data, which have already been transmitted to a field team working along the Napo River, will be used to guide field measurements during a second observation by UAVSAR on March 31, 2013.
The image is a 8.7-mile-wide by 5.6-mile-long (14-kilometer-wide by 9-kilometer-long) segment of an image measuring more than 124 miles (200 kilometers) long. North is toward the upper right. The resolution is 20 feet (6 meters).
UAVSAR data like these are helping scientists assess the effectiveness of using synthetic aperture radar data to study the inundation dynamics of this and similar rivers around the world.
The image colors indicate the likelihood of inundation (flooding) beneath the forest canopy, which is difficult to determine using traditional optical sensors. Red and yellow shades indicate a high likelihood of standing water with emergent vegetation, blue and green shades are areas less likely to be inundated, and black indicates the open water areas of the Napo River.
These data, which have already been transmitted to a field team working along the Napo River, will be used to guide field measurements during a second observation by UAVSAR on March 31, 2013.
The image is a 8.7-mile-wide by 5.6-mile-long (14-kilometer-wide by 9-kilometer-long) segment of an image measuring more than 124 miles (200 kilometers) long. North is toward the upper right. The resolution is 20 feet (6 meters).
UAVSAR data like these are helping scientists assess the effectiveness of using synthetic aperture radar data to study the inundation dynamics of this and similar rivers around the world.
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