ESS102H1 Study Guide - Midterm Guide: Landsat 4, Landsat 1, Radiant Flux
Document Summary
Landsat is a public domain, meaning: under an open skies policy, images are acquired of the entire earth without obtaining permission from any government; and users anywhere in the world may purchase all images at uniform prices and priorities. Landsat 1, 2, & 3: altitude 918km, 18 day repeat cycle, on-board data storage. Landsat 4 & 5: altitude 705km, 16 day repeat cycle. Mss: 4 bands (0. 5 1. 10 microns), terrain 185 by 185 km, ground cell 79 by 70 m. Tm: 7 bands (0. 45 2. 35 microns, 10. 5 12. 5 microns), terrain 185 by 170 km, ground cell 30 by 30 m (viz and nir) and 120 by 120 m (tir) Tm imaging system records data on the east-&westbound sweeps with a slower scan rate, longer dwell time, and higher signal-to-noise ratio than mss. Limited spectral diversity b/c no rir bands used. Limited spectral diversity b/c no viz bands used.
