How GPS Receivers Work – Trilateration vs Triangulation
Have you ever wondered how your GPS receiver works? They use a technique called trilateration, which measures distances, not angles as in triangulation.
Have you ever wondered how your GPS receiver works? They use a technique called trilateration, which measures distances, not angles as in triangulation.
IKONOS provides panchromatic, natural-color, color-infrared and stereo images for cartographic, remote sensing and photogrammetric applications.
During an 11-day mission, Space Shuttle Radar Topography (SRTM) mission captured Earth’s elevation at 1 arc-second (30 meters) for over 80% of the Earth.
Nearest neighbor classification is a powerful approach to classify segmented objects based on specific statistics and training samples chosen by the user.
A polar orbit satellite travels pole-to-pole. For a sun-synchronous orbit, it passes over any given point on Earth’s surface at the same local solar time.
NDVI quantifies vegetation with the difference between near-infrared (which is reflected by vegetation) and red light (which is absorbed by vegetation).
The atmospheric window allows specific bands of electromagnetic (EM) radiation to reach the Earth. On the other hand, absorption bands prevent EM radiation.
Have you ever wondered about your GPS accuracy? A well-designed GPS receiver can achieve a horizontal accuracy of 3 meters or better. But factors affect it.
While geosynchronous satellites can have any inclination, the key difference is that satellites in geostationary orbit lie on the same plane as the equator.
Remote sensing is the science of obtaining information without physically being there. The 3 most common methods of capture is airplane, satellite & drones.