Discussion
Satellite images are geometrically distorted because of ............
(1) Change in altitude
(2) Change in attitude
(3) Change in sensor ability
(4) Malfunctioning of sensor
Answer: A
The causes are (1) and (2), so the answer is (1) and (2).
Geometric distortion means that features are displaced from their true positions in the image. Changes in the satellite's altitude alter the scale of the image, and changes in its attitude, its roll, pitch and yaw, skew and shift the image. Earth rotation and curvature add further geometric errors.
A change in sensor sensitivity or a malfunctioning detector causes radiometric errors, such as striping or missing lines, which affect the brightness values rather than the geometry.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development