Topic
FIELD SURVEY
139
MONTHLY TO ANNUAL
97
GRID
88
30 METERS TO 100 METERS
82
IN SITU/LABORATORY INSTRUMENTS > PROBES > PROBES
77
TRANSECT
70
biota
66
environment
58
EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA
56
500 METERS TO 1 KILOMETER
52
EARTH SCIENCE > CRYOSPHERE > FROZEN GROUND > ACTIVE LAYER
50
ANNUAL
45
geoscientificInformation
31
EARTH SCIENCE > LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT
27
IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL MOISTURE PROBE
22
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > PHOTON/OPTICAL DETECTORS > CAMERAS > CAMERAS
21
EARTH SCIENCE > LAND SURFACE > SOILS > SOIL TEMPERATURE
15
KITE
15
WEEKLY TO MONTHLY
15
1 KILOMETER
13
IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL TEMPERATURE PROBE
13
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > SPECTROMETERS/RADIOMETERS > SPECTROMETERS > SPECTROMETERS
12
IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL DEPTH PROBE
10
250 METERS TO 500 METERS
9
EARTH REMOTE SENSING INSTRUMENTS > ACTIVE REMOTE SENSING > PROFILERS/SOUNDERS > LIDAR/LASER SOUNDERS > LIDAR > LIGHT DETECTION AND RANGING
4
EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > SNOW DEPTH
4
EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER
3
POINT
3
EARTH SCIENCE > LAND SURFACE > SURFACE RADIATIVE PROPERTIES > REFLECTANCE
2
ENVIRONMENT
2
100 METERS TO 250 METERS
1
DAILY TO WEEKLY
1
EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION SPECIES
1
EARTH SCIENCE > CRYOSPHERE > SEA ICE > SNOW MELT
1
EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > SNOW DENSITY
1
GRIDS AND VECTORS
1
UNKNOWN
1
elevation
1