EVA Spacewalk Biomonitoring Dashboard

EVA Workload

Suit & Telemetry

LCG cooling water flow 55%

Telemetry downlink rate 4.0 kbps

Biotelemetry Status

Nominal — all systems green

Heart rate

72 bpm

Core temp

37.0 °C

Suit O2 remaining

100 %

EVA elapsed

00:00

How it works

Mission control tracks a spacewalking astronaut through three coupled models, each driven by the metabolic power P (watts) of the current workload:

Heat balance (LCG):  dT/dt = (0.8·P − Q_cool) / C
Heart rate (Karvonen): HR = HR_rest + (VO2/VO2max)·(HR_max − HR_rest)
O2 consumption:      VO2 (L/min) = P / 351.7
                      O2_remaining -= VO2 · dt / tank_capacity

Workload buttons — set the target metabolic power P: Rest ≈ 120 W, Translate ≈ 350 W, Tool Work ≈ 600 W, Sprint ≈ 1000 W, matching measured NASA EVA metabolic-rate ranges.
LCG cooling flow — sets how much of that heat the Liquid Cooling Garment's water loop removes (Q_cool); too little flow at high workload drives core temperature up toward the 38 °C heat-stress threshold.
Telemetry downlink rate — the data rate of the biosensor link to the relay antenna; the streaming pulses you see slow down at low kbps, mirroring real bandwidth-limited suit telemetry.
Heart rate follows the Karvonen %heart-rate-reserve model with a first-order lag (~45 s), the same regression used to estimate exertion from VO2 in exercise physiology.
The status ring turns amber when core temp, heart rate or O2 approach flight limits, and red once one is exceeded — exactly the alarm tiering used on an EVA biomedical display.

Astronaut biosensor Telemetry pulse Relay antenna

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