ASy - Tide Pro

"Tidal Harmonic Analysis & Prediction — Admiralty Edition"

ASy - Tide Pro is an advanced desktop analytical engine designed for hydrographers, coastal engineers, and maritime professionals. It specializes in the Admiralty Method of tidal harmonic analysis, converting raw water-level observations into precise tidal constituents and long-term predictions.

Core Capabilities

1. High-Precision Harmonic Analysis

Using a sophisticated Least Squares regression engine, the software extracts nine primary tidal constituents to define the local maritime environment:

• Diurnal: K1, O1, P1, Q1

• Semidiurnal: M2, S2, N2, K2

• Shallow Water: M4

• Automatic Formzhal Calculation: Instantly determines the tidal characteristic (Diurnal, Semidiurnal, or Mixed) based on the relationship between major astronomical components.

2. Automated Tidal Datum Derivation

The software automatically calculates critical vertical datums used in maritime navigation and construction, including:

• HAT / LAT: Highest and Lowest Astronomical Tides.

• MHWS / MLWS: Mean High Water Springs and Mean Low Water Springs.

• MSL (Z0): Mean Sea Level (Tidal Datum).

3. Advanced Data Cleaning & Pre-processing

Built-in "Sanity Check" tools ensure that raw sensor data is survey-grade before analysis:

• Outlier Removal: Uses a 3-sigma statistical filter to eliminate spikes and sensor noise.

• Gap Filling: Employs time-series interpolation to reconstruct missing data points while maintaining astronomical trends.

• Moving Average Smoothing: Reduces high-frequency surface noise for a cleaner harmonic signal.

4. Predictive Modeling

• Future Forecasting: Generate tidal predictions for up to 30 days (720 hours) based on analyzed local constituents.

• Admiralty Reference: Align predictions with astronomical time-bases for maximum accuracy in hydrographic survey planning.

Key Technical Features

• Multi-File Import: Batch process multiple raw CSV or TXT data files simultaneously.

• Dynamic Visualizer: An interactive, high-contrast graphing engine powered by Matplotlib, allowing for dual-view (Observation vs. Prediction) comparison.

• Intelligent Export Engine:

  • Generates multi-sheet Excel reports.

  • Automatically handles large datasets (up to 1,000,000+ rows) by partitioning across sheets.

  • Exports dedicated "Harmonic Constituent" and "Datum" tables for engineering reports.

Technical Specifications

Methodology

Admiralty Harmonic Analysis (Least Squares)

Input Format

CSV, TXT (Date, Time, Value)

Output Format

XLSX (Excel), Professional Graphic Plots

Platform

Windows 10/11 (Optimized for High-DPI displays)

ASy Group — Precision Bridge for Maritime Excellence.