GIS & REMOTE SENSING
A sensor is a device that produces an output signal for the purpose of sensing a physical phenomenon. In Remote Sensing, using scanning systems, which employ a Sensor with a narrow Instantaneous Field of View (IFOV) that sweeps over the terrain.
Summary: – Synthetic Aperture Radar (SAR) is an active remote sensing technology that uses microwave radar signals to create high-resolution images of the Earth’s surface, regardless of weather conditions or daylight. What is Synthetic Aperture Radar? A Synthetic Aperture Radar (SAR) is an airborne or spaceborne side looking Radar system which utilizes the flight path […]
Spectral Signature/Signal in Remote Sensing What is Signature/ Signal? A signature is a set of data that defines a training sample, feature space object, or cluster. The signature is used in a classification process. Each classification decision rule requires some signature attributes as input—these are stored in the signature file (.sig). Signatures in Erdas Imagine
Sensor Scanner in Remote Sensing What is Sensor Scanner In Remote Sensing, using scanning systems, which employ a Sensor with a narrow Instantaneous Field of View (IFOV) that sweeps over the terrain. Scanning systems can be used on both aircraft and satellite platforms. Types of Sensors Scanning System There are two main modes of scanning
Microwave Remote Sensing What is Microwave Remote Sensing? Microwave Remote Sensing (RS) uses Electromagnetic radiation with a wavelength between 1 mm (millimeter) to 1 meter and frequency interval from 40,000 to 300 Hz (Hertz). This covers the longest wavelengths used for remote sensing. Because of the greater wavelength compared to visible and infrared radiation, microwaves
Sensor Resolution in Remote Sensing Resolution in Remote Sensing refers to the level of detail that a sensor can capture. There are four primary types of resolution, each representing a different aspect of image quality and utility. What is Remote Sensing Resolution? Resolution is a broad term commonly used in Remote Sensing. The Resolution is