fn main() {
    let pv = europas::observation::jupiter_view::JupiterView::sub_jupiter_default();
    println!("Apparent diameter: {} deg", pv.apparent_diameter_deg);
    println!("Visible: {}", pv.is_visible());
    println!(
        "Jupitershine gain: {:.3}",
        europas::observation::jupiter_view::jupitershine_gain(pv, 0.67)
    );
    let nav = europas::observation::navigation::NavigationSolution::autonomous_surface_fix();
    println!("Nav robust: {}", nav.is_robust());
}
