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STAGE 2 · flight_time_sec

Flight time

Time from the detected take-off boundary to the next detected landing boundary.

BetaDefinition version 1.0.0
Unit
s
Category / visibility
movement_performance · professional_report
Capture
iOS 视频 Beta · PC 视频 · 可选 IMU
Compute
iOS Beta · PC
Display
iOS · PC · Web
Measurement methods
video_contact · body_center_proxy · video_imu_consensus
Model
phase-timing-v1

What this metric measures

Flight time is a phase-timing measurement. It must retain the phase-detection method and confidence because video, IMU and laboratory contact methods do not have identical boundaries.

How Trampoline Lab calculates it

Preferred output uses video and body-worn sensor consensus. Video-only operation may use foot contact when valid or a calibrated hip/body-centre trajectory proxy when contact is not observable.

How to interpret it

Use flight time to describe airborne timing and as one input to height and rhythm analysis. Do not apply universal beginner-to-elite bands to fitness rebounders without product-specific validation.

Limits and responsible use

Frame rate, motion blur, mat visibility, foot occlusion and phase-boundary errors materially affect the result.

Implementation contract

Required inputs同一周期的离网边界与下一着网边界
Minimum sample至少 1 个双方边界均有效的周期
Calculation or rulelanding_time - takeoff_time;方法字段区分视频、身体中心代理或视频/IMU共识
Exclusions边界顺序错误、脚部/跳布不可见、同步不合格、低置信度
Output秒 s,按方法独立保存
Unavailable when没有有效边界对
Default summary中位数、均值、P10–P90 和有效周期数
Quality evidence帧率、时间分辨率、边界方法、置信度、同步状态
Implementation evidencebeta_definition_ready

Related metrics

Method references

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