Image Selection - ASAR

ASAR is available in different types of modes, various combinations of polarization and swath. It is important that the right parameters are applied for the application intended (Table 1).

Table 1. Adapted from ESA Summary of Applications vs Products 2006, http://envisat.esa.int

Application	Mode	Polarisation	Swath	Remarks
Agriculture	AP	VV/VH	IS4-6	Multi-temporal
Land Cover	AP	VV/VH	IS4-6	Multi-temporal
Forestry	AP	VV/VH	IS4-6	Multi-temporal and interferometry
Vegetation maps	WS	VV or HH		Large area cover multitemporal
Soil moisture	AP	VV/VH	IS1-3	High revisit
Soil moisture estimation	WS	VV
Snow melt	IM	HH or VV	IS3-7	High revisit
Glacier/ice sheet motion	IM	HH or VV	IS3-6
Ice sheet extent and melt areas	WS	HH or VV
Snow climatology	WS and GM	HH or VV
Sea Ice	WS and GM AP	HH VV/HH	IS2-6
Hydrology	AP	VV/VH	IS2-5	High revisit
Inland Water	IM	VV	IS2-4
Oceanography	AP WS	VV/HH HH	IS2-6
Coastal phenomena	AP	VV/HH	IS2-6
Marine meteorology	AP WS	VV/HH VV	IS2-6
Wind/Wave Models	WS	VV
Wetlands	WS	VV
Geology	IM	HH	IS4-7
Surface motion and subsidence	IM	VV or HH	IS2-5	Using interferometry
Pollution Monitoring	WS	VV