Find close approaches between two satellites.
Uses coarse-fine search: scans at a configurable step size, then refines with golden-section search within each candidate interval.
Examples
{:ok, el1} = Orbis.Format.TLE.parse(line1a, line2a)
{:ok, el2} = Orbis.Format.TLE.parse(line1b, line2b)
approaches = Orbis.Conjunction.find(el1, el2,
start_min: 0.0,
end_min: 1440.0,
step_min: 1.0,
threshold_km: 50.0
)
for {tca_min, distance_km} <- approaches do
IO.puts("TCA: +#{Float.round(tca_min / 60, 1)}h, miss: #{Float.round(distance_km, 2)} km")
endSummary
Functions
Find all close approaches between two satellites within a time window.
Functions
@spec find(Orbis.Elements.t(), Orbis.Elements.t(), keyword()) :: [{float(), float()}] | {:error, term()}
Find all close approaches between two satellites within a time window.
Times are in minutes from the first satellite's epoch.
Options
:start_min- start of search window in minutes (default: 0.0):end_min- end of search window in minutes (required):step_min- coarse scan step size in minutes (default: 1.0):threshold_km- only report approaches closer than this (default: 50.0)
Returns
List of {tca_min, distance_km} tuples, sorted by time.