45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
//! Writes the exact slant path gaseous attenuation computed by this
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//! workspace, for cross-checking against ITU-R P.676-12.
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//!
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//! 写出本工作区计算的精确斜路径气体衰减，用于对照 ITU-R P.676-12 交叉核对。
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//!
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//! Usage:
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//!
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//! ```text
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//! cargo run -p apsis-rs --features rf --example dump_gas_exact \
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//! > validation/data/expected/rust_gas_exact.csv
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//! ```
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use apsis_atmosphere::{Atmosphere, slant_path_attenuation_exact};
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/// The scenarios sampled, as frequency in gigahertz and elevation in
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/// degrees.
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///
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/// 所采样的场景，以吉赫兹计的频率与以度计的仰角。
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const SCENARIOS: &[(f64, f64)] = &[
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(12.0, 90.0),
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(12.0, 30.0),
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(12.0, 10.0),
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(12.0, 5.0),
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(12.0, 1.0),
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(20.0, 30.0),
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(20.0, 5.0),
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(30.0, 10.0),
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(60.0, 30.0),
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(1.0, 30.0),
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(100.0, 5.0),
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];
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fn main() {
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println!("frequency_ghz,elevation_deg,attenuation_db");
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let atmosphere = Atmosphere::REFERENCE;
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for &(frequency, elevation_degrees) in SCENARIOS {
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let Some(attenuation) =
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slant_path_attenuation_exact(frequency, elevation_degrees.to_radians(), atmosphere)
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else {
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continue;
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};
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println!("{frequency},{elevation_degrees},{attenuation:.12}");
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}
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}
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