fn main() {
    let pv = phoboss::observation::mars_view::MarsView::sub_mars_default();
    println!("Apparent diameter: {} deg", pv.apparent_diameter_deg);
    println!("Visible: {}", pv.is_visible());
    println!(
        "Planetshine gain: {:.3}",
        phoboss::observation::mars_view::marsshine_gain(pv, 0.5)
    );
    let nav = phoboss::observation::navigation::NavigationSolution::autonomous_surface_fix();
    println!("Nav robust: {}", nav.is_robust());
}
