Sampling schemes for instruments in

Massachusetts Bay Internal Wave Experiment

+------+----------+---------+---------+-------------------------------+
| **Si | *        | **Ins   | **Sam   | **Variables and sampling      |
| te** | *Mooring | trument | pling** | scheme**                      |
|      | type**   | type**  |         |                               |
|      |          |         | **int   |                               |
|      |          |         | erval** |                               |
+------+----------+---------+---------+-------------------------------+
| ## A | Surface  | Seacat  | 60 s    | T, C, one sample every 60 s   |
+------+----------+---------+---------+-------------------------------+
|      |          |         |         |                               |
+------+----------+---------+---------+-------------------------------+
| *    | Surface  | tpod    | 120 sec | T, one sample every 120 s     |
| *B** |          |         |         |                               |
+------+----------+---------+---------+-------------------------------+
| *    | Su       | tpod    | 120 s   | T, one sample every 120 s     |
| *B** | bsurface |         |         |                               |
+------+----------+---------+---------+-------------------------------+
|      |          | VMCM    | 60 s    | V, vector-average every 60 s; |
|      |          |         |         |                               |
|      |          |         |         | T, one sample at end of       |
|      |          |         |         | interval                      |
+------+----------+---------+---------+-------------------------------+
|      |          | FSI     | 90 s    | V, vector-average every 90 s; |
|      |          |         |         |                               |
|      |          |         |         | T, one sample at end of       |
|      |          |         |         | interval                      |
+------+----------+---------+---------+-------------------------------+
|      |          | Tide    | 60 s    |                               |
+------+----------+---------+---------+-------------------------------+
| *    | Ho       | FSI     | 90 s    | V, average every 90 s;        |
| *B** | rizontal |         |         |                               |
|      |          |         |         | T, one sample at end of       |
|      |          |         |         | interval                      |
+------+----------+---------+---------+-------------------------------+
|      |          | SBE     | 15 s    | T, one sample every 15 s      |
+------+----------+---------+---------+-------------------------------+
|      |          | M       | 15 s    | T, C, one sample every 15 s   |
|      |          | icrocat |         |                               |
+------+----------+---------+---------+-------------------------------+
|      |          | tpod    | 120 s   | T, one sample every 240 s     |
+------+----------+---------+---------+-------------------------------+
| *    | Tripod   | ADCP    | 60 s    | V, average of 60 one-second   |
| *B** |          |         |         | pings every 60 s in 2 m bins  |
+------+----------+---------+---------+-------------------------------+
|      |          | 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                      |
+------+----------+---------+---------+-------------------------------+
|      |          |         |         |                               |
+------+----------+---------+---------+-------------------------------+
| *    | Surface  | M       | 15 s    | T, C, one sample every 15 s   |
| *C** |          | icrocat |         |                               |
+------+----------+---------+---------+-------------------------------+
| *    | Su       | M       | 15 s    | T, C, one sample of every 15  |
| *C** | bsurface | icrocat |         | s                             |
+------+----------+---------+---------+-------------------------------+
|      |          | SeaCat  | 50 s    | T, C, and Tr, one sample of   |
|      |          |         |         | every 50 s                    |
+------+----------+---------+---------+-------------------------------+
| *    | Tripod   | ADCP    | 60 s    | V, average of 60 one-second   |
| *C** |          |         |         | pings every 60 s in 2 m bins. |
+------+----------+---------+---------+-------------------------------+
|      |          | 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