The air pressure sensor can either be a high precision barometer (HPB) by Honeywell, stable over the two-year-long nominal lifespan of the drifters and with an accuracy of ☐.4 hPa, or an integrated pressure transducer (IPT), also by Honeywell, that has similar specifications and accuracy.īecause ocean waves often pull the surface buoy underwater, the air intake that communicates with the barometer is protected with a specially designed self-draining port and waterproofed with two Gore-Tex® membranes.
The SVP Barometer (SVPB) drifter has the same capabilities of the SVP drifter but it also carries a barometer to measure sea level pressure (Niiler, 2001 Maximenko et al., 2013 Centurioni et al., 2017 Horányi et al., 2017).
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