USGS Coastal and Marine Geology Program
Table 2. Sampling schemes for instruments in Massachusetts Bay Internal Wave Experiment
Site |
Mooring type |
Instrument type |
Sampling interval |
Variables and sampling scheme |
---|---|---|---|---|
A |
Surface |
Seacat |
60 s |
T, C, one sample every 60 s |
B |
Surface |
tpod |
120 sec |
T, one sample every 120 s |
B |
Subsurface |
tpod |
120 s |
T, one sample every 120 s |
B |
Subsurface |
VMCM |
60 s |
V, vector-average every 60 s; T, one sample at end of interval |
B |
Subsurface |
FSI |
90 s |
V, vector-averaged at? Hz every 90 s; T, one sample at ? of interval |
B |
Subsurface |
Tide |
60 s |
T, P ?? |
B |
Horizontal |
FSI |
90 s |
V, average at ? Hz every 90 s; T, one sample at ? of interval |
B |
Horizontal |
SBE |
15 s |
T, one sample every 15 s |
B |
Horizontal |
Microcat |
15 s |
T, C, one sample every 15 s |
B |
Horizontal |
tpod |
120 s |
T, one sample every 240 s |
B |
Tripod |
ADCP |
60 s |
V, average of 60 one-second pings every 60 s in 2 m bins |
B |
Tripod |
MIDAS |
60 s |
V and P, 60 s averages at .5 Hz; T, C and Tr, single sample every 60 s in center of interval |
C |
Surface |
Microcat |
15 s |
T, C, one sample every 15 s |
C |
Subsurface |
Microcat |
15 s |
T, C, one sample of every 15 s |
C |
Subsurface |
SeaCat |
50 s |
T, C, and Tr, one sample of every 50 s |
C |
Tripod |
ADCP |
60 s |
V, average of 60 one-second pings every 60 s in 2 m bins. |
C |
Tripod |
Camera |
1 hour |
Single picture |
Variables Key:C = Conductivity; P = Pressure; T = Temperature; Tr = Light transmission; V = Current velocity.
Instrument Key:ADCP = Acoustic Doppler current Profiler; Camera = Benthos 35 mm camera; FSI = Falmouth Scientific, Inc.; MIDAS = USGS Multiparameter Intelligent Data Logging System; SBE = Sea Bird Electronics; tpod = ; VMCM = Vector Measuring Current Meter
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