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

to NOAA Web sitePrincipal funding is provided by NOAA Climate Program Office. (CPO).
Data Links
See Data Archive page, above, for delayed-mode data.
Deployed: June 10, 2018 at 20:53 UTC
Met data text files:
Daily transmission: Logger 5     Logger 3
Complete listing: ASIMet1     ASIMet2
Plots: plot-1 or plot-2 or plot-3
NetCDF: ASIMet1 - ASIMet2
CDL: ASIMet1 - ASIMet2

Deployed: January 30, 2017 at 20:31 UTC
Met data text files:
Daily transmission: Logger 16     Logger 12
Complete listing: ASIMet1     ASIMet2
Plots: plot-1 or plot-2 or plot-3

Real Time Data

The NTAS site is WMO ID 48401, NDBC Partner Platform 41NT0 and wave station 41060.

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

Real time data is sent back to shore by several subsystems on the buoy. The buoy is equipped with two ASIMet loggers which are capable of transmitting hourly averaged met data. One system sends data four times daily via Argos, and the other sends data hourly using the Iridium network. A subsurface telemetry system, consisting of an inductive modem transmitting via Iridium, sends back data from several instruments on the mooring line. Links to near-real-time data are on the right-hand column of this page.

NTAS data is also available from the OceanSITES THREDDS server at NDBC.


The seventeenth NTAS buoy was deployed from the R/V Pisces on June 10, 20:53 UTC.


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 well as OceanSITES NetCDF files.

NTAS imet fig 1 NTAS  imet fig 2

Subsurface Data via Iridium

The NTAS 17 subsurface telemetry system uses an inductive subsystem developed at WHOI and transmitted via an Iridium modem.

The inductive modem transmits data from 5 SBE 37s and a single current meter. A record 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 approximately at the center of the hourly sample.

Inductive data listing: Daily Complete
Plots: Temperature Velocity

Subsurface Instrumentation

The instruments are sampled once per hour. The ID# controls the position of the instruments' data within the Iridium message.

Depth (m)MakeModelSNSample rate (min)
10SeabirdSBE-37 IM1340910
25SeabirdSBE-37 IM1341010
40SeabirdSBE-37 IM1341110
55SeabirdSBE-37 IM1341210
70SeabirdSBE-37 IM1341310


The sixteenth NTAS buoy was deployed from the R/V Endeavor on January 30, 2017 at 20:31 UTC. It was recovered on June 12, 2018.

Last updated: June 26, 2018.