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FIELD SURVEY
9
EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA
8
GRID
8
MONTHLY TO ANNUAL
7
30 METERS TO 100 METERS
5
500 METERS TO 1 KILOMETER
5
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > SPECTROMETERS/RADIOMETERS > SPECTROMETERS > SPECTROMETERS
5
ANNUAL
4
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > PHOTON/OPTICAL DETECTORS > CAMERAS > CAMERAS
4
TRANSECT
4
KITE
3
EARTH SCIENCE > LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT
2
IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL MOISTURE PROBE
2
1 KILOMETER
1
1 METER TO 30 METERS
1
DECADAL
1
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > POSITIONING/NAVIGATION > GPS > GPS > GLOBAL POSITIONING SYSTEM
1
EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY
1
EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC ELECTRICITY > ATMOSPHERIC CONDUCTIVITY
1
EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER
1
EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION SPECIES
1
EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS
1
EARTH SCIENCE > LAND SURFACE > LANDSCAPE > LANDSCAPE ECOLOGY
1
IN SITU/LABORATORY INSTRUMENTS > CHEMICAL METERS/ANALYZERS > CARBON ANALYZERS
1
IN SITU/LABORATORY INSTRUMENTS > PROBES > PROBES
1
OBSERVATORY
1
climatologyMeteorologyAtmosphere
1
environment
1
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