POV: HOW TO CALCULATE GYRO ERROR BY SUN ☀️ (UNTIL LHA ONLY) скачать в хорошем качестве

POV: HOW TO CALCULATE GYRO ERROR BY SUN ☀️ (UNTIL LHA ONLY)

POV: HOW TO CALCULATE GYRO ERROR BY THE SUN ☀️ (UNTIL LHA ONLY) PART 1️⃣ using the Nautical Almanac. Below is the steps: ⸻ 1. Sun’s Declination (Dec) Declination = Sun’s angular distance north or south of the equator Steps: 1. Open the Nautical Almanac 2. Go to the daily pages for the required date 3. Look under SUN 4. Read: • Declination (Dec) for the given hour • d value (change per hour) Apply interpolation: If the time is not exactly on the hour: \text{Correction} = d \times \text{minutes past the hour} Add or subtract depending on: • Same name (both N or both S) → add • Contrary name → subtract Final: \text{Sun’s Dec} = \text{Hourly Dec} \pm \text{Correction} 📌 Declination is always labeled N or S ⸻ 2. Sun’s Local Hour Angle (LHA) LHA tells you how far west the sun is from your local meridian. Step 1: Find Sun’s GHA From the Nautical Almanac: 1. Use the same date 2. Go to the hour of GMT 3. Read Sun’s GHA 4. Apply increment and interpolation for minutes and seconds \text{Sun’s GHA} = \text{Hourly GHA} + \text{Increment} ⸻ Step 2: Apply Longitude If longitude is East: \text{LHA} = \text{GHA} - \text{Longitude} If longitude is West: \text{LHA} = \text{GHA} + \text{Longitude} ⚠️ If the result is: • Less than 0° → add 360° • More than 360° → subtract 360° ⸻ 3. Quick Memory Trick 🧠 “East is least, West is best” • East longitude → subtract • West longitude → add Thank you! #ConcernedProfessor #SEAMAN #fyp #youtubeshorts