Simple ISS Orbitals inside of the Concave Earth (with Python Source Code)

CE Library Overview
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Python Script for ISS Orbitals

  • The script as is, is configured to have a full day’s orbital for the ISS in 240 frames.

  • A full days orbitals of the ISS consists of 15.5 orbits per day.

  • Script caps total frames to 5000

Here is the python script below

# @TRUEMODELOFTHEWORLD 
# https://concaveearth.net/t/simple-iss-orbitals-inside-of-the-concave-earth-with-python-source-code/548
# 

import bpy
import math

def create_iss_orbit():
    # Clear existing objects
    bpy.ops.object.select_all(action='SELECT')
    bpy.ops.object.delete(use_global=False)

    # Add a sphere to represent Earth
    bpy.ops.mesh.primitive_uv_sphere_add(radius=1, location=(0, 0, 0))
    earth = bpy.context.object
    earth.name = "Earth"

    # Add a smaller sphere to represent the ISS
    bpy.ops.mesh.primitive_uv_sphere_add(radius=0.05, location=(1.2, 0, 0))
    iss = bpy.context.object
    iss.name = "ISS"

    # Set up animation parameters
    total_frames = 5000  # Total frames for extended animation
    frames_per_day = 240  # 240 frames represent one full day
    orbits_per_day = 15.5  # ISS completes ~15.5 orbits per day
    total_days = total_frames / frames_per_day

    # Add keyframes for the ISS to simulate an inclined orbit
    orbit_inclination = math.radians(51.6)  # Approximate inclination of the ISS in degrees
    orbital_radius = 1.2  # Distance of ISS from Earth's center

    for frame in range(total_frames + 1):
        # Calculate time elapsed in days
        time_in_days = frame / frames_per_day
        
        # Calculate the orbital angle for the current frame
        angle = 2 * math.pi * orbits_per_day * time_in_days
        
        # Calculate the position in the inclined orbit
        x = orbital_radius * math.cos(angle)
        y = orbital_radius * math.sin(angle) * math.cos(orbit_inclination)
        z = orbital_radius * math.sin(angle) * math.sin(orbit_inclination)

        # Set the ISS location for the current frame
        iss.location = (x, y, z)
        iss.keyframe_insert(data_path="location", frame=frame)

    # Set scene settings
    bpy.context.scene.frame_start = 0
    bpy.context.scene.frame_end = total_frames

# Run the script to create the ISS orbit animation
create_iss_orbit()