15. Tropical-Cyclone-Ocean Interaction Experiment



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Figure 3: Left: NHC official forecast track, which pre-storm ocean sampling region highlighted. Target region is centered ~48 hours prior to forecast arrival of storm. Right: P-3 flight track (red line) and ocean sampling pattern consisting of a grid of AXCTD/AXBT probes Probes are deployed at ~0.5 deg. intervals. Total time for this pattern is estimated to be ~9 hours.

Flight altitude: 6-8 kft preferable for best dropsonde coverage

Leg length or radii: 105 n mi

Estimated in-pattern flight duration: ~ 5 h

Expendable distribution: 50 aircraft ocean expendables

Instrumentation Notes: Use straight flight legs as safety permits.

P-3 Module 4 (In storm survey)

What to Target: Sample the core region of a TC

When to Target: no constraint

Pattern: Rotated Figure-4.

Flight altitude: 10 kft preferable for best dropsonde coverage

Leg length or radii: 105 n mi

Estimated in-pattern flight duration: ~ 5 h

Expendable distribution: 20 to 30 aircraft ocean expendables

Instrumentation Notes: Use straight flight legs as safety permits.

P-3 Module 5 (post storm Ocean survey)

What to Target: Sample the core region of a TC

When to Target: post storm

Pattern: as in Fig. 4



Figure 4: Left: Post-storm ocean sampling flight pattern (red line), over previously-sampled area (black box). In this example, the pattern extends around 470 km in the along-track dimension, or around 0.75 of a near-inertial wavelength. Right: Flight pattern with expendable drop locations, consisting of a combination of AXCP and AXBT probes.

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