I'm trying to create an Earth-Earth-Jupiter flight plan around the year 2020 with TransX. The Trajectory Browser as well as the [ame="http://www.orbithangar.com/searchid.php?ID=5418"]trajectory optimization tool[/ame] suggest that this is possible.
In TransX however, I cannot get the closest approach to Jupiter actually close enough for an actual encounter. At the end of the post is one of my attempts and the report of the trajectory optimization tool.
I think the Earth flyby date in the TransX plan is close enough to the traj. opt. tools report but when I tweak the encounter MJD in TransX to be close to the date in the report with just the outward angle, Jupiter is way off. Changing the inclination in that stage quickly results in an even worse closest approach.
Has someone done a similar flight plan and might have some tips for me?
In TransX however, I cannot get the closest approach to Jupiter actually close enough for an actual encounter. At the end of the post is one of my attempts and the report of the trajectory optimization tool.
I think the Earth flyby date in the TransX plan is close enough to the traj. opt. tools report but when I tweak the encounter MJD in TransX to be close to the date in the report with just the outward angle, Jupiter is way off. Changing the inclination in that stage quickly results in an even worse closest approach.
Has someone done a similar flight plan and might have some tips for me?
Code:
BEGIN_DESC
Contains the latest simulation state.
END_DESC
BEGIN_ENVIRONMENT
System Sol
Date MJD 58954.0058771777
END_ENVIRONMENT
BEGIN_FOCUS
Ship GL-01
END_FOCUS
BEGIN_CAMERA
TARGET GL-01
MODE Cockpit
FOV 50.00
END_CAMERA
BEGIN_HUD
TYPE Surface
END_HUD
BEGIN_MFD Left
TYPE User
MODE TransX
Ship GL-01
FNumber 5
Int 1
Orbit True
Vector -3154733.83829 967691.937969 5449864.94235
Vector -336.547907833 92.2880495285 -211.202568637
Double 3.98600439969e+014
Double 58954.0058769
Handle Earth
Handle NULL
Handle NULL
Select Target
0 Escape
Autoplan
0 0
Plan type
0 0
Plan
0 1
Plan
0 0
Plan
0 0
Select Minor
0 None
Manoeuvre mode
0 0
Auto-Centerٍ
0 0
Base Orbit
0 0
Prograde vel.
1 0
Man. date
1 58954.0053384
Outward vel.
1 0
Ch. plane vel.
1 0
Intercept with
0 0
Orbits to Icept
0 0
Graph projection
0 0
Scale to view
0 0
Advanced
0 0
Pe Distance
1 7645212
Ej Orientation
1 0
Equatorial view
0 0
Finvars
Finish BaseFunction
Int 2
Orbit False
Handle Sun
Handle Earth
Handle Earth
Select Target
0 Earth
Autoplan
0 0
Plan type
0 2
Plan
0 0
Plan
0 0
Plan
0 1
Select Minor
0 None
Manoeuvre mode
0 0
Auto-Centerٍ
0 0
Base Orbit
0 1
Prograde vel.
1 0
Man. date
1 58954.0058765
Outward vel.
1 0
Ch. plane vel.
1 0
Intercept with
0 0
Orbits to Icept
0 2
Graph projection
0 0
Scale to view
0 0
Advanced
0 0
Prograde vel.
3 5099.70972896
Eject date
1 58954.0004909
Outward vel.
1 0
Ch. plane vel.
3 0.9
Finvars
Finish BaseFunction
Int 4
Orbit True
Vector -3230602597.41 2391586.87093 8700969905.86
Vector 1645.53585251 -1.68070115895 -4896.98023055
Double 3.98600439969e+014
Double 59670.6411156
Handle Earth
Handle NULL
Handle NULL
Select Target
0 Escape
Autoplan
0 0
Plan type
0 1
Plan
0 0
Plan
0 1
Plan
0 0
Select Minor
0 None
Manoeuvre mode
0 0
Auto-Centerٍ
0 0
Base Orbit
0 0
Prograde vel.
1 0
Man. date
1 58954.0056684
Outward vel.
1 0
Ch. plane vel.
1 0
Intercept with
0 0
Orbits to Icept
0 0
Graph projection
0 0
Scale to view
0 0
Advanced
0 0
View Orbit
0 0
Finvars
Finish BaseFunction
Int 3
Orbit True
Vector -128540279493 1869741.48294 -79868493914.7
Vector 17392.1280201 0.592738394835 -30096.2253314
Double 1.32712838556e+020
Double 59691.3523283
Handle Sun
Handle Earth
Handle Jupiter
Select Target
0 Jupiter
Autoplan
0 0
Plan type
0 2
Plan
0 0
Plan
0 0
Plan
0 2
Select Minor
0 None
Manoeuvre mode
0 0
Auto-Centerٍ
0 0
Base Orbit
0 0
Prograde vel.
1 0
Man. date
1 58954.0058765
Outward vel.
1 0
Ch. plane vel.
1 0
Intercept with
0 0
Orbits to Icept
0 0
Graph projection
0 0
Scale to view
0 0
Advanced
0 0
Velocity.
1 0
Outward angle
5 0.213251658392
Inc. angle
1 0
Inherit Vel.
0 0
Eject date
1 59691.3523283
Finvars
Finish BaseFunction
Int 5
Orbit False
Handle Jupiter
Handle NULL
Handle NULL
Select Target
0 None
Autoplan
0 0
Plan type
0 1
Plan
0 0
Plan
0 2
Plan
0 0
Select Minor
0 None
Manoeuvre mode
0 0
Auto-Centerٍ
0 0
Base Orbit
0 1
Prograde vel.
1 0
Man. date
1 58954.0005475
Outward vel.
1 0
Ch. plane vel.
1 0
Intercept with
0 0
Orbits to Icept
0 0
Graph projection
0 0
Scale to view
0 0
Advanced
0 0
Draw Base
0 0
Finvars
Finish BaseFunction
END_MFD
BEGIN_MFD Right
TYPE User
MODE TransX
END_MFD
BEGIN_SHIPS
GL-01:DeltaGlider
STATUS Landed Earth
POS -80.6824940 28.5967940
HEADING 330.01
RCSMODE 0
AFCMODE 7
PRPLEVEL 0:0.995000 1:1.000000
NAVFREQ 94 524 84 114
XPDR 0
GEAR 1 1.0000
PSNGR 2 3 4
AAP 0:0 0:0 0:0
END
END_SHIPS
BEGIN_ExtMFD
END
Code:
TRAJECTORY OPTIMIZATION TOOL v2
Optimization Report - 14-Jan-2015 19:38:20
Flight Plan: EEJ 2020
----------------------------------------------------------------
RESULTS
--------------------------------
OPTIMUM EARTH DEPARTURE DATE: 9/8/2020 14:37:59 - C3: 90.1377 km²/sec²
OPTIMUM EARTH SWINGBY DATE: 5/28/2022 23:52:9 - Powered Delta-V Required: 3.3249e-006 km/sec
OPTIMUM JUPITER BARYCENTER ARRIVAL DATE: 12/19/2024 13:14:26 - Body-centric Arrival Velocity: 5.8187 km/sec
TOTAL COST: 197.7315505
ORBITAL ELEMENTS - J2000 Ecliptic Reference Frame
--------------------------------
LEG 1 (Number of Full Revolutions: 0)
-Semi-major Axis: 232078105.9956491 km
-Eccentricity: 0.4154591
-Inclination: 0.0029463 deg
-Long. of Ascending Node: 177.0795112 deg
-Argument of Periapse: 120.3432078 deg
-True Anomaly (start): 48.6939094 deg
-True Anomaly (end): 309.9015247 deg
LEG 2 (Number of Full Revolutions: 0)
-Semi-major Axis: 455597028.6213902 km
-Eccentricity: 0.6700455
-Inclination: 3.1096967 deg
-Long. of Ascending Node: 247.2732039 deg
-Argument of Periapse: 11.8618472 deg
-True Anomaly (start): 348.1892673 deg
-True Anomaly (end): 177.8032643 deg
GENETIC ALGORITHM INFORMATION
--------------------------------
Termination Reason: Maximum number of iterations exceeded. Consider increasing maximum number of iterations in the optimization options.
Number of Generations Computed: 250.0
Number of Fitness Function Evaluations: 63147.0
Random Number Generator Type: mt19937ar