These Multi-angle Imaging Spectroradiometer (MISR) images of Oklahoma and north Texas were acquired on March
12, 2000. The three images on the left, from top
to bottom, are from the 70-degree forward viewing camera, the
vertical-viewing (nadir) camera, and the 70-degree aftward viewing
camera. The higher brightness, bluer tinge, and reduced contrast of the
oblique views result primarily from scattering of sunlight in the
Earth's atmosphere, though some color and brightness variations are also
due to differences in surface reflection at the different angles. The
longer slant path through the atmosphere at the oblique angles also
accentuates the appearance of thin, high-altitude cirrus clouds.
On the right, two areas from the nadir camera image are shown in more
detail, along with notations highlighting major geographic features. The
south bank of the Red River marks the boundary between Texas and
Oklahoma. Traversing brush-covered and grassy plains, rolling hills, and
prairies, the Red River and the Canadian River are important resources
for farming, ranching, public drinking water, hydroelectric power, and
recreation. Both originate in New Mexico and flow eastward, their waters
eventually discharging into the Mississippi River.
A smoke plume to the north of the Ouachita Mountains and east of Lake
Eufaula is visible in the detailed nadir imagery. The plume is also very
obvious at the 70-degree forward view angle, to the right of center and
about one-fourth of the way down from the top of the image.