GNSS

High level definitions to work with GNSS in Rust

• Space Vehicles definitions: SV
• GNSS Constellations: Constellation
• GNSS Timescales: Constellation.timescale()

Getting started

Add "gnss" to your Cargo.toml

gnss-rs = "2"

Import "gnss-rs":

extern crate gnss_rs as gnss;

Space Vehicles

A small library to define and handle satellite vehicles and constellation.

use gnss_rs::sv;
use gnss_rs::prelude::*;

use std::str::FromStr;
use hifitime::{TimeScale, Epoch};

// This method lets you construct satellites that may not exist
let sv = SV::new(Constellation::GPS, 1);

assert_eq!(sv.constellation, Constellation::GPS);
assert_eq!(sv.prn, 1);
assert_eq!(sv.launch_date(), None); // only for SBAS vehicles

SBAS (Geostationary) vehicles

The library integrates a smart SBAS constellation identifier. We use the RINEX convention (PRN ranging from 0..100), therefore the true satellite number of SBAS vehicles is the PRN we use +100.

use gnss_rs::sv;
use gnss_rs::prelude::*;

use std::str::FromStr;
use hifitime::{TimeScale, Epoch, MonthName};

// This only works if satellite do exist in our database
assert!(SV::new_sbas(1).is_none());

let egnos_geo23 = SV::new_sbas(23)
    .unwrap(); // GEO #123

assert_eq!(egnos_geo23.prn, 23);
assert!(egnos_geo23.constellation.is_sbas()); // obviously
assert_eq!(egnos_geo23.constellation, Constellation::EGNOS); // smart builder

let launch_date = egnos_geo23.launch_date()
    .unwrap(); // only for detailed SBAS

assert_eq!(launch_date.year(), 2021);
assert_eq!(launch_date.month_name(), MonthName::November);

Other definitions and features

Other definitions and features exist. Use compilation options (crate features) to unlock them. The idea is to maintain a very minimal default library.

• The SERDE features unlocks serialization/deserialization of the main structures defined here.

• The DOMES features unlocks the definition of DOMES GNSS/IGS reference station, that are widely used in GNSS data processing. This number identifies a station uniquely.

• The COSPAR features unlocks the definition of the COSPAR (Launch) ID number. This number identifies the launch of a vehicule uniquely. It is used in RINEX and other files format.

• The SBAS feature will create a static database that defines each SBAS service areas, projected on ground as WKT/GEO objects, with one method to select a SBAS service based on Latitude and Longitude coordinates.

Relevant Ecosystems

Many libraries exist nowadays to process GNSS data or perform typical GNSS processing tasks.
Amongst them, be sure to checkout:

• Nyx: Orbital navigation
• ANISE: Earth orientation modeling and Orbital navigation
• GNSS-RTK: Precise Point Positioning, related calculations and modeling
• RINEX: files processing and management
• SP3: files processing and management
• Hifitime: Timescale and related calculations
• CGGTTS: files production and processing

License

This library is part of the NAV-Solutions framework which is licensed under Mozilla V2 Public license.