Return to Earth From Space Home
Earth from Space logo Image Information Earth from Space logo

Display a Screen Layout for Printing

IMAGE: gray corner       IMAGE: gray corner
  Image: Geographic Location Direction Photo #: ISS049-E-1116 Date: Sep. 2016
Geographic Region: BRAZIL

Ordering information for space photography
IMAGE: gray corner     IMAGE: gray corner

Image: gray corner     Image: gray corner
  View Low-Resolution Image  
  Image Caption: Lagoa Mirim

An astronaut aboard the International Space Station captured this photograph of the north end of Lagoa Mirim, a 180-kilometer-long coastal lagoon straddling the border of Brazil and Uruguay.

Three rivers enter the lagoon (top), and rectangular agricultural fields (dark tones in the image) cover nearly all of the dry land in the scene. In contrast, the water has a bright grey, mirror-like appearance due to sunlight reflected off the surface directly back to the camera. This sunglint emphasizes the meandering courses of the rivers and reveals a group of recently inundated fields (top left) that are mainly used for rice farming.

Around 400,000 years ago, sea level was higher and the Atlantic Ocean covered this part of Brazil's coast. The lagoons on the southern coast of Brazil, including Lagoa Mirim, were formed by the natural rise and fall of sea level over time, a process geologists call the transgression-regression cycle. Eventually the connection between the lagoon and the Atlantic Ocean closed up, and the main source of water became the rivers draining the Brazilian interior - making Lagoa Mirim a freshwater lagoon.

On both sides of the narrow part of the lagoon (center), ancient beach ridges are visible as a set of curved stripes and islands. Water circulation formed these ridges, which were built up over the past thousand years as waves and currents moved sediment along the shoreline.

Image: gray corner     Image: gray corner

Images: All Available Images Low-Resolution 180k
Mission: ISS049  
Roll - Frame: E - 1116
Geographical Name: BRAZIL  
Center Lat x Lon: 32.4S x 52.7W
Film Exposure:   N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP: 10
Camera: N6
Camera Tilt: HO   LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length: 800  
Nadir to Photo Center Direction: NW   The direction from the nadir to the center point, N=North, S=South, E=East, W=West
Stereo?:   Y=Yes there is an adjacent picture of the same area, N=No there isn't
Orbit Number:  
Date: 20160910   YYYYMMDD
Time: 173518   GMT HHMMSS
Nadir Lat: 36.6S  
Latitude of suborbital point of spacecraft
Nadir Lon: 47.1W  
Longitude of suborbital point of spacecraft
Sun Azimuth: 311   Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude: 220   nautical miles
Sun Elevation: 36   Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views:  
Water Views:  
Atmosphere Views:  
Man Made Views:  
City Views:  
Photo is not associated with any sequences

Home Page
Home Page
JSC Digital
Image Collection
Earth Science &
Remote Sensing

NASA meatball logo
This service is provided by the International Space Station program and the JSC Earth Science & Remote Sensing Unit, ARES Division, Exploration Integration Science Directorate.
ESRS logo