Time Travel Positioning Program by ChatGPT

gistfile1.txt

"""
Python script to calculate displacement in space between two points in time, compensating for Earth's movement through the solar system and galaxy
Created by ChatGPT
Use at your own risk! I have absolutely no idea if this works!
Saved just in case time travel becomes a thing somehow
"""

from astroquery.jplhorizons import Horizons
from astropy.time import Time
import numpy as np
import math

# Constants
R_EARTH_KM = 6371.0
SIDEREAL_DAY_SECONDS = 86164.1  # Earth's sidereal rotation
GALACTIC_VELOCITY_KMPS = 220    # Sun’s galactic orbital speed

def gps_to_eci(lat_deg, lon_deg, time_str, alt_km=0):
    """
    Converts GPS coordinates to Earth-Centered Inertial (ECI) position at a given time.
    """
    lat = math.radians(lat_deg)
    lon = math.radians(lon_deg)

    time = Time(time_str, scale='utc')
    jd = time.jd
    sidereal_angle = ((280.46061837 + 360.98564736629 * (jd - 2451545.0)) % 360)
    theta = math.radians((lon + sidereal_angle) % 360)

    r = R_EARTH_KM + alt_km
    x = r * math.cos(lat) * math.cos(theta)
    y = r * math.cos(lat) * math.sin(theta)
    z = r * math.sin(lat)

    return np.array([x, y, z])

def get_earth_position(time_str):
    """
    Gets Earth's position in space from JPL Horizons (relative to solar system barycenter).
    """
    obj = Horizons(id='399', location='500@0', epochs=Time(time_str, format='iso').jd)
    vec = obj.vectors()[0]
    return np.array([float(vec['x']), float(vec['y']), float(vec['z'])])

def estimate_solar_displacement(time_now, time_target, velocity_kmps=GALACTIC_VELOCITY_KMPS):
    """
    Estimates Sun's linear galactic displacement between two times (in +Y direction).
    """
    t1 = Time(time_now, scale='utc')
    t2 = Time(time_target, scale='utc')
    dt_seconds = (t2 - t1).sec
    dy = velocity_kmps * dt_seconds
    return np.array([0.0, dy, 0.0])  # +Y galactic direction

def calculate_displacement(lat, lon, alt_km, time_now, time_target):
    """
    Calculates full spatial displacement in galactic frame for a GPS point between two times.
    """
    # Step 1: Get Earth's barycentric position
    earth_now = get_earth_position(time_now)
    earth_then = get_earth_position(time_target)

    # Step 2: Add surface GPS position (ECI adjusted)
    local_now = gps_to_eci(lat, lon, time_now, alt_km)
    local_then = gps_to_eci(lat, lon, time_target, alt_km)

    abs_now = earth_now + local_now
    abs_then = earth_then + local_then

    # Step 3: Estimate Sun’s galactic displacement
    solar_offset = estimate_solar_displacement(time_now, time_target)
    galactic_now = abs_now + estimate_solar_displacement(time_now, time_now)
    galactic_then = abs_then + solar_offset

    # Step 4: Calculate total galactic displacement
    vector = galactic_then - galactic_now
    displacement_km = np.linalg.norm(vector)

    return {
        'displacement_km': displacement_km,
        'vector_km': vector,
        'from_position_km': galactic_now,
        'to_position_km': galactic_then
    }

# Example usage
if __name__ == "__main__":
    lat = 37.7749    # San Francisco
    lon = -122.4194
    alt = 0          # Sea level
    time_now = "2025-04-24 00:00"
    time_target = "1925-04-24 00:00"

    result = calculate_displacement(lat, lon, alt, time_now, time_target)

    print(f"\nTotal galactic displacement over time jump: {result['displacement_km']:.2f} km")
    print(f"Displacement vector: {result['vector_km']}")
    print(f"Start galactic position (km): {result['from_position_km']}")
    print(f"End galactic position (km): {result['to_position_km']}")