1. Introduction to Remote-Sensing

7. Violet: m
Blue: m
Green: m
Yellow: m
Orange: m
Red: m

17. a) Energy Source
b) Radiation and the Atmosphere
c) Radiation and the Surface
d) Sensor recording Radiation
e)Transmitting Sensor Data
f) Data Analysis
g) Remote Sensing Application

20. Aerial photographs
Scanned for processing
High resolution <1m
Small footprints 1-3 kms
Limited spectral bands, black and white, colour or Infra Red
High radial distortion - difficult to mosaic
Satellite Images e.g. LANDSAT
Collected digitally
Low resolution >15 m
Large footprints 185 kms
8 spectral bands, including black and white, colour, near- and mid-Infra Red and thermal
Relatively low distortion fairly easy to mosaic

22. As a satellite revolves around the Earth, the sensor "sees" a certain portion of the Earth's surface. The area imaged on the surface, is referred to as the swath.

31. Radar Imagery is particularly important for marine pollution since it clearly detects and oil spill through greater back scattering of radiation.