Orbit issues?

[jonsberndt]

It used to be that the ball_orbit script produced a run that did not deviate from the altitude very much. For some reason this same run now seems to be failing horribly.

[jonsberndt]

Disregard this. I updated from the repo and it looks like all is working.

[seanmcleod]

@jonsberndt I pulled the latest from the repo and built and I get this output for the altitude.

Is this is what you were expecting?

[seanmcleod]

Ah, I just realised I was running the script ball.xml and not ball_orbit.xml.

The ball_orbit script does report 800,000ft down to 3 decimal places for all reports.

Time Notify (Event 0) executed at time: 10200.005000
    Height AGL (ft):          = 800000.000105
    Altitude (Geod, ft):      = 800000.000105
    Latitude (Geod, deg):     = -0.000000
    Vehicle Radius (ft):      = 21725646.325565
    Inertial Vel Mag (ft/s):  = 25473.404282
    Body X Velocity (ft/s):   = 19623.958214
    Simulation Frame:         = 2040001.000000
    Density:                  = 0.000000
    Angular momentum (ft^2/s) = 553426172137.420532
    Inclination (deg)         = 0.000000
    Right ascension (deg)     = 0.000000
    Argument of perigee (deg) = 325.231134
    Period (s)                = 5374.952767
    Eccentricity              = 0.001507
    Apoapsis radius (ft)      = 21791206.648235
    Periapsis radius (ft)     = 21725646.325565
    True anomaly (deg)        = 360.000000

End: Friday December 03 2021 00:43:21 (HH:MM:SS)

[jonsberndt]

Ah, I just realised I was running the script ball.xml and not ball_orbit.xml.

The ball_orbit script does report 800,000ft down to 3 decimal places for all reports.

Hi, Sean - thanks. I was using a version of JSBSim from about year ago and there were apparently some changes in it. I started with a fresh checkout and it looks good.