Scenario26

HST V3 Trajectory 26

WSE approach around an articulated retrograde-pointing target, LEO, approach-axis camera

Walking safety ellipse (WSE) approachLEO1000 frames5.66319 s/frame90° FoVarticulatedstereo

Trajectory card & sample video

trajectory_26_card.png · HST_DatasetV3_26_color.mp4
QuaternionRelative attitude of the target in the camera frame, per frame.
Target translationTarget position in the camera frame. tz is the range on the left axis (m); tx/ty use the right axis.
Optical-axis angleAngle from the chaser body front axis to the Sun, the Earth centre and the target — the annotation’s SunToCameraAngle, EarthToCameraAngle and TargetToCameraAngle. A flat 0° target trace means the chaser is pointed at the target.
Scene / illuminationBands along the bottom: eclipse or daylight, plus when the Earth and the Sun are inside the field of view.
TrajectoryWSE approach around an articulated retrograde-pointing target, LEO, approach-axis camera. Start range 50 m · end range 11 m · radial amplitude 4.4033 m · cross-track amplitude 10 m · initial phase -1.5708 rad · cross-track phase 0 rad · unsafe phasing false. Starts at 2025-07-24T03:38:00 UTC.
PlaybackCentre camera, colour post-process, every rendered frame in order — 1000 frames at 30 fps = 33.3 s · 1024×1024 · H.264 · no audio · 15.8 MB

Configuration

Target orbit

Regime
LEO
NORAD ID
20580

Keplerian elements

Semi-major axis a (derived)
6867 km
Eccentricity e
0.0002079
Inclination i
28.4667°
RAAN Ω
151.7145°
Argument of perigee ω
139.3030°
Mean anomaly M
220.7720°

Mean motion & derived

Mean motion
15.25642731 rev/day
Orbital period
94.39 min
Mean altitude
488.9 km
// target two-line element set
1 20580U 90037B   25205.53225489  .00006074  00000-0  22379-3 0  9999
2 20580  28.4667 151.7145 0002079 139.3030 220.7720 15.25642731738397

Target spacecraft

Attitude mode
Retrograde (anti-velocity) pointing
Attitude hold
Controlled

Articulation

Solar-panel Sun tracking
not enabled
TDRS antenna tracking
enabled
ApertureDoor (frames 105–149)
0° → -112°
ApertureDoor (frames 510–564)
-112° → 0°
PV3_Antenna (frames 650–695)
current → 0°
NV3_Antenna (frames 650–695)
current → 0°
NV3_AntennaPitch (frames 600–639)
current → 0°
PV3_AntennaPitch (frames 600–639)
current → 0°
NV3_AntennaYaw (frames 600–639)
current → 0°
PV3_AntennaYaw (frames 600–639)
current → 0°

Camera & render

Behaviour
Body-fixed to the approach (anti-velocity) axis
Attitude mode
Retrograde (anti-velocity) pointing
Attitude hold
Controlled
Target angle
rises 0–40°

Optics & render

Horizontal field of view
90° (default)
fx = fy (derived)
512.00
cx = cy
512
Cameras
Center · Right
Resolution
1024×1024 px
Pixel samples
32
Camera axes
−Z forward · +X right · +Y down

Relative trajectory

Generator
Walking safety ellipse (WSE) approach
Step name
WalkingSafetyEllipseOrbitGenerator
Start range
50 m
End range
11 m
Radial amplitude
4.4033 m
Cross-track amplitude
10 m
Initial phase
-1.5707963267948966 rad
Cross-track phase
0 rad
Allow unsafe phasing
false
Random seed
26

Timing

Start epoch (UTC)
2025-07-24T03:38:00.0000000Z
Frames
1000
Time step
5.66319 s
Duration
5663.19 s
Duration (clock)
1 h 34 min 23 s
Orbits covered (derived)
1.00

Illumination

Class
sweeps through the run
Sun optical-axis angle
30° – 148°
Spotlight
Auto
// 180° = Sun directly behind the camera (target fully lit)
// ~165° = low phase angle · ~95° = high phase angle