Badal

Badal (Hindi/Urdu: बादल — cloud) — weather and atmospheric modeling engine for AGNOS

Complete meteorology library: ISA atmosphere, pressure systems, moisture/humidity, cloud classification, wind dynamics, atmospheric stability, precipitation, radiation budget, mesoscale phenomena, severe weather indices, and integration with pravash (fluid dynamics) and ushma (thermodynamics). Built on hisab for math.

Features

Feature	Default	Description
`atmosphere`	always	ISA model, AtmosphericState, virtual/potential temp, pressure/density altitude
`pressure`	always	Barometric formula, PGF, geostrophic wind, sea level correction
`moisture`	always	Saturation VP (Bolton), dew point, humidity, heat index (NWS), wet bulb
`cloud`	always	10 CloudType variants, cloud base, LCL
`wind`	always	Coriolis, wind chill, Beaufort, thermal wind, direction, log profile
`stability`	always	CAPE, CIN, lapse rates, lifted/K/TT indices, Brunt-Väisälä
`precipitation`	always	Rain rate, 7 precip types, WMO intensity, snow SLR, freezing level
`radiation`	always	Solar geometry, irradiance, longwave, net radiation, DTR, day length
`mesoscale`	always	Sea/land breeze, katabatic/anabatic, valley wind, UHI, canyon
`severe`	always	SCP, STP, DCP, BRN, EHI, ThreatLevel
`fluids`	opt-in	Pravash coupling: atmospheric grid, Coriolis/PGF forcing, flood modeling
`thermo`	opt-in	Ushma coupling: surface energy balance, ET₀, heat fluxes
`logging`	opt-in	Structured tracing via `BADAL_LOG` env var

Quick Start

[dependencies]
badal = "1"

use badal::{atmosphere, moisture, wind, precipitation, radiation};

let state = atmosphere::AtmosphericState::at_altitude(3000.0);
println!("T={:.1}K, P={:.0}Pa", state.temperature_k(), state.pressure_pa());

let dp = moisture::dew_point(25.0, 60.0).unwrap();
let rate = precipitation::rain_rate(badal::CloudType::Cumulonimbus, 2000.0);
let day = radiation::day_length(45.0_f64.to_radians(), radiation::solar_declination(172));
let b = wind::beaufort_scale(15.0); // 7 (High wind)

Building

cargo build
cargo test --all-features   # 266 tests
make bench                  # 27 criterion benchmarks

Consumers

kiran/joshua — game weather, environmental effects
bhava 1.5 — planetary conditions → personality modulation
pavan — atmospheric state feeds aerodynamics
goonj — temperature → speed of sound

License