Digital Frame Cameras with Area Arrays in Satellite Remote Sensing
-
What it is
-
A digital frame camera is like a normal camera (phone or DSLR) but used in satellites.
-
It takes a picture of the Earth in one shot (a frame), instead of scanning line by line.
-
-
Area Array Sensor
-
Inside the camera, there is an area array — a grid of tiny light-sensitive cells called pixels.
-
Example: 4000 × 4000 pixels → captures a square image of the Earth.
-
Each pixel records the amount of reflected light from the ground.
-
-
How it works in satellites
-
The satellite moves in orbit.
-
The camera clicks frames at intervals.
-
These frames are stitched together to create a large map of Earth's surface.
-
-
Advantages
-
High resolution → small ground details (like roads, fields, buildings) can be seen.
-
Fast capture → takes a full area at once, not slowly scanning.
-
Accurate geometry → less distortion compared to scanning sensors.
-
Comments
Post a Comment