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+--- Thread: Earth to Mars trajectory design (/thread-18912.html)
Earth to Mars trajectory design - cdeaglejr - 10-01-2022 10:26 AM
This HP program can be used to calculate ballistic interplanetary trajectories between the Earth and Mars. The orbit transfer is modelled as a two-body system with an impulsive delta-v at departure and arrival.
The user can provide an Earth departure calendar date and a Mars arrival calendar date. The following is the "hard-wired" data for the attached example.
// departure calendar date
month := 6;
day := 1;
year := 2003;
// departure utc julian day
jd_depart := julian(month, day, year);
// earth is the departure planet
ip_depart := 3;
sv_depart := planet(ip_depart, jd_depart);
for i from 1 to 6 do
oev_depart(i) := sv_depart(i + 6);
end;
// arrival calendar date
month := 12;
day := 27;
year := 2003;
// arrival utc julian day
jd_arrive := julian(month, day, year);
// mars is the arrival planet
ip_arrive := 4;
sv_arrive := planet(ip_arrive, jd_arrive);