Release History

Changelog

Every release of Axiorad, documented. New features, calculation engine improvements, and platform updates — in reverse chronological order.

v1.10.020 March 2026Latest

Marcum Q-Function Detection Model

Calculation Engine
  • Marcum Q-function for precise detection probability calculation
  • Numerical integration via Rice integral with Bessel I₀ approximation
  • Swerling case 0-4 target fluctuation models
  • Detection model selector: Albersheim (fast) or Marcum Q (precise)
  • More accurate at extreme Pd values (< 0.1 or > 0.99)
  • Albersheim remains default — zero change for existing users
v1.9.020 March 2026

Waveform-Based Signal Processing

Calculation Engine
  • Physically-based processing gain from waveform parameters
  • Coherent and non-coherent pulse integration models
  • Pulse compression gain calculation
  • Blind velocity and unambiguous range computation
  • Range resolution derived from pulse width and compression
  • Simple/Advanced mode toggle — flat gain or waveform-based
v1.8.020 March 2026

Sensitivity Time Control (STC)

Calculation Engine
  • Range-dependent receiver gain control (STC) modeling
  • Configurable R² / R³ / R⁴ attenuation laws
  • Adjustable STC range limit for clutter suppression tuning
  • Integrated into coverage calculation for realistic short-range behavior
v1.7.020 March 2026

Jamming & ECM Analysis

Calculation Engine
  • Stand-off jammer modeling with configurable position, power, and bandwidth
  • Self-screening jammer (target-mounted) with range-dependent analysis
  • Barrage and responsive jamming modes
  • Burn-through range calculation
  • Jamming integrated into SCNR: detection based on S/(N+C+J)
  • Full ECM configuration panel with jammer type, mode, and position controls
v1.6.020 March 2026

Configurable Atmospheric Refraction

Calculation Engine
  • Configurable k-factor (effective Earth radius) for atmospheric refraction
  • Presets: standard (4/3), no refraction (1.0), super-refraction (2.0)
  • Surface refractivity (N₀) input with automatic k-factor derivation
  • k-factor propagated through all calculations: LOS, diffraction, clutter, GPU
v1.5.020 March 2026

Multi-Format Antenna Pattern Import

Calculation Engine
  • Two-column pattern format support (CSV, TSV, space-delimited)
  • MSI Planet format support (.msi, .pln) — industry standard
  • Automatic format detection across all supported file types
  • Auto-detection of elevation vs. azimuth pattern data
  • Sparse pattern interpolation to 360° resolution
  • Revert to Gaussian beam option when pattern is loaded
v1.4.020 March 2026

Blake Chart — Range-Altitude Analysis

Visualization
  • Range vs. altitude detection probability heatmap (Blake chart)
  • Interactive floating panel with minimize/close controls
  • Pd contour lines at 50% and 90% detection thresholds
  • Color-coded visualization with integrated legend
  • Supports SCNR mode when clutter modeling is active
v1.3.020 March 2026

Clutter Modeling & SCNR

Calculation Engine
  • Signal-to-Clutter+Noise Ratio (SCNR) replaces SNR when clutter is active
  • Surface clutter: GIT sea model (1-100 GHz) and constant-gamma land model
  • Rain volume clutter via Marshall-Palmer Z-R reflectivity relationship
  • Configurable surface types: sea, rural, urban, forest, custom
  • Sea clutter parameters: sea state, wind speed, wind direction
  • SCNR map visualization mode
  • Range resolution parameter for clutter cell area computation
v1.2.020 March 2026

Changelog & Technology Pages

Platform
  • Public changelog page with full release history
  • Structured JSON-LD data for search engine indexing
  • Technology page documenting the calculation engine
  • Coverage of propagation models, terrain analysis, environmental effects, detection theory, calculation runtime, and elevation data sources
v1.1.020 March 2026

Firm Track Probability

Calculation Engine
  • M-out-of-N binomial detection model for tracking reliability analysis
  • Configurable tracking criteria with presets (2/3, 3/5, 2/4)
  • Firm track probability map visualization mode
  • Per-radar tracking configuration with results statistics
v1.0.01 February 2026

Initial Release

Platform
  • Planning-grade propagation models with auto-selection (ITM, COST-231, ITU-R P.1812-6, two-ray, free-space)
  • Coverage calculations via browser CPU worker
  • Multi-source elevation data (SRTM, Mapbox, Google)
  • Line-of-sight, Fresnel zone, and knife-edge diffraction analysis
  • Environmental effects: atmospheric absorption (P.676), rain attenuation (P.838), vegetation loss (P.833)
  • Multi-radar analysis with best-server computation
  • Export to GeoTIFF, KML, GeoJSON, CSV
  • Real-time terrain profile visualization
Try It Now

Ready to run an analysis?

Put the latest capabilities to work. Configure radar parameters, select a propagation model, and generate coverage maps with the authoritative browser CPU worker.

Open Analysis Tool

Five propagation models • Browser compute • See /methodology