SVP Specifications

Depth of Measurement

• 15 meter (Standard)
• 5 - 50 meter (Optional)

Telemetry

• Iridium SBD with Iridium  9602 Modem

Positioning

• Multi-constellation GNSS receiver supports GPS and other GNSS constellations depending on receiver configuration.
• GNSS acquisition windows are optimized for low-power operation and may be extended upon request to improve fix reliability or enable augmentation features where available, with a corresponding reduction in battery life.

Standard Battery Packs

• 12 V; 8S4P alkaline D cells; estimated 56 Ah capacity (14" surface float)
• 12 V; 8S8P alkaline D cells; estimated 112Ah capacity (16" surface float)
• 12 V; 8S12P alkaline D cells; estimated 168Ah capacity (18" surface float)

Standard Status Sensors

• Battery Voltage
• GNSS Positions (GPS, GLONASS, Beidou)
• Position Quality
• Drifter-deployed-in-conductive-water or drogue-on sensor

Optional Status Sensors

• Internal Surface Sphere Temperature

Optional Sensors

• Sea Surface Temperature (SST)
• Higher Accuracy SST
• Air Pressure
• Wind Velocity
• Conductivity/Temp (Salinity)

Buoy Battery Lifespan

• Operating life: 6–60 months with standard 56 Ah battery pack, depending on sampling/transmission rate and field conditions. Harsh weather or rough seas can increase GPS acquisition time and transmission retries, reducing battery life.

Power Mode Switch

• A magnet, held in place with a sponge or hook-and-loop strap, switches the drifter from low-power mode to deployment mode when removed. The magnet, held in place by a sponge, falls off when the drifter is deployed in water.

Diameter

• 14 in, 35 cm (Standard)
• 16 in, 40 cm (Optional)
• 18 in, 45 cm (Optional)

Material

• ABS Plastic

Color

• White

Anti-Fouling Paint Available

• Yes (Changes lower hemisphere color to blue)

Protected Sea Surface Temperature (SST) Probe

• Yes

SST Depth

• 3.5 in (9 cm)
  

Power Mode Switch

• A magnet, held in place with a sponge or hook-and-loop strap, switches the drifter from low-power mode to deployment mode when removed. The magnet, held in place by a sponge, falls off when the drifter is deployed in water.

Type

• Holey Sock

Depth of Measurement

• 15 meter (Standard)
• 5 - 50 meter (Optional)
  

Section Dimensions

• 24 in (61 cm) diameter x 48 in (122 cm) length (Standard)
• 36 in (91 cm) diameter x 36 in (91 cm) length (Optional)

Section Count

• 6 sections => total length 24ft (Standard)
• Other section-counts available optionally

Drag Area Ratio

• Greater than 40

Tether

• 1/4 in (0.64 cm) plastic impregnated wire rope

Deployment

• Weight: 45 lb / 20 kg
• Ready for shipboard deployment by minimally trained personnel
• Includes magnetic self-release power switch for automatic activation at deployment
• Deployment instructions provided on each drifter
• Integrated carrying handle for easier handling and deployment

Pallet Shipping

• Custom pallet configurations available

Sea Surface Temperature (SST)

Accuracy 0.1 °C, Range -5 to 40 °C

High Accuracy SST

Accuracy 0.05 °C, Range -5 to 40 °C

Air Pressure

Accuracy 1 mBar, Range 800 - 1100 mBar

Wind Velocity

Accuracy 2% @ 12 m/s, 0 - 60 m/s

Conductivity Temp (Sea-Bird SBE 37)

Temperature:  Accuracy 0.002 °C, Range -5 to 35 °C

Conductivity: Accuracy 0.0003 s/m, Range 0 - 7 s/m