Technical & Aerospace Glossary

• OWLT: One-Way Light Time, the duration required for a radio signal to travel between spacecraft and Earth.
• DTN: Delay-Tolerant Networking, communications architecture designed to handle extreme latency and disconnections.
• SQA: Signal Quality Analysis, algorithms evaluating physiological plausibility and sensor artifacts.
• EVA: Extravehicular Activity, astronaut spacewalk outside the spacecraft or habitat.
• DSN: Deep Space Network, NASA's international array of giant radio antennas supporting interplanetary missions.
• HMAC: Hash-based Message Authentication Code, cryptographic verification of payload authenticity.