cdm#

Conjunction Data Message (CCSDS 508.0-B-1).

Parse and manipulate Conjunction Data Messages for space debris collision risk assessment. Supports CSV (TraCSS CA verification dataset), JSON-ST (Space-Track compatible), and KVN (Keyword=Value Notation) formats.

Installation#

opam install cdm

Usage#

(* Parse CDMs from a TraCSS CSV file *)
match Cdm.Csv.of_file "tracss_ca.csv" with
| Ok cdms ->
  List.iter (fun cdm ->
    Printf.printf "TCA: %s  Pc: %e  miss: %.1f m\n"
      (Cdm.tca cdm) (Cdm.pc cdm) cdm.miss_distance
  ) cdms
| Error e -> Fmt.epr "%a\n" Cdm.pp_error e

(* Parse a single CDM from KVN format *)
let cdm = Cdm.Kvn.of_string kvn_string

API Overview#

• type t -- A conjunction event: run_id, conj_id, obj1, obj2, probability, miss_distance, epoch
• type object_data -- Per-object data: state vector, covariance, metadata, OD/physical parameters
• type state_vector -- Position (vec3 km) and velocity (vec3 km/s) in J2000
• type covariance -- 3x3 position covariance upper triangle in RTN frame (m^2)
• Csv -- Parse TraCSS CA verification dataset CSV (of_file, of_string, fold_channel)
• Json_st -- Parse Space-Track JSON format (of_string, of_single)
• Kvn -- Parse CCSDS KVN format (of_string)
• tca, tca_ptime, pc -- Accessors for TCA and probability of collision

License#

ISC