Project NTAS - Northwest Tropical Atlantic Station for air-sea flux measurement

Real Time Data

NTAS-XI

The eleventh NTAS buoy was launched November 25,2011, at 1800 UTC. In addition to an Iridium modem transmitting data from the System 2 logger, the mooring includes a subsurface telemetry engineering test system consisting of an inductive modem transmitting through a second Iridium modem. Links to near-real-time data and a description of the system are on the right-hand column of this page.

Surface Data

Hourly meteorological data for the current deployment of the NTAS buoy are recieved via Service Argos four times daily. Data is displayed as time series and available for download as ASCII files.

A note on resolution, and one on ASIMet data formats.

ASIMet plot 1



ASIMet plot 2

Subsurface Data

The NTAS 11 subsurface Iridium modem telemeters data from an inductive modem.

The inductive modem transmits data from 3 SBE 37s, 2 SBE 39s, and a Nortek Aquadopp current meter. Time is provided by the Seabird Inductive Modem (SIM) and represents the time of receipt of the last sample by the SIM. To adjust the time word in the Iridium data stream, we have subtracted 30 minutes, so time is the center of the hourly sample.

Inductive data listings:	Daily	Full
Temperature plots:	This week	Full
Current Velocity plots:	This week	Full

Subsurface Instrumentation

The rate listed is the sample rate, in minutes, however the transmited data is subsampled once per hour; the sample rate provides a time window within which the sample may have been taken. The ID# controls the position of the instruments' data within the Iridium message.

Instrument	S/N:	ID#	Depth (m)	Rate (min)
SBE39	4462	7	10	10
Nortek	6108	41	13	20
SBE37P	0671	3	25	10
SBE37	0683	5	45	10
SBE37	0685	4	65	10
SBE39	4463	8	80	10

Wave Data

The NTAS 10 and 11 buoys were equipped with NDBC WAMDAS Wave systems. Wave data is available at NDBC's Station 41060 page.

Last updated: December 3, 2011.