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FIELD SURVEY
31
500 METERS TO 1 KILOMETER
29
EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA
28
biota
28
MONTHLY TO ANNUAL
25
ANNUAL
12
250 METERS TO 500 METERS
11
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > PHOTON/OPTICAL DETECTORS > CAMERAS > CAMERAS
11
KITE
11
IN SITU/LABORATORY INSTRUMENTS > PROBES > PROBES
10
IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL MOISTURE PROBE
9
IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL TEMPERATURE PROBE
9
EARTH SCIENCE > CRYOSPHERE > FROZEN GROUND > ACTIVE LAYER
8
WEEKLY TO MONTHLY
8
geoscientificInformation
8
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > SPECTROMETERS/RADIOMETERS > SPECTROMETERS > SPECTROMETERS
6
EARTH SCIENCE > LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT
5
EARTH SCIENCE > LAND SURFACE > SOILS > SOIL TEMPERATURE
4
environment
4
30 METERS TO 100 METERS
3
ENVIRONMENT
3
1 KILOMETER
2
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