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p1: lat_fix

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ntnt
2026-02-02 16:31:36 +08:00
parent 9a54d9ddcb
commit a3c5e2987c
3 changed files with 20 additions and 3 deletions
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p1/latitude_effects.png
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p1/specific_energy_comparison.py
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@@ -551,7 +551,22 @@ def plot_latitude_effects(
# Plot continuous curve # Plot continuous curve
ax.plot(latitudes, fuel_ratios, 'g-', linewidth=2, label='Fuel Ratio vs Latitude') ax.plot(latitudes, fuel_ratios, 'g-', linewidth=2, label='Fuel Ratio vs Latitude')
# Mark launch sites # Mark launch sites with custom offsets to avoid overlap with curve
# Offsets: (x, y) in points - positive y moves text up, positive x moves right
label_offsets = {
'赤道': (5, -15), # Below curve
'Kourou': (5, 8), # Above curve
'SDSC': (5, -15), # Below curve
'Texas': (-50, 8), # Left and above
'Florida': (5, 8), # Above curve
'California': (-60, -8), # Left
'Virginia': (5, 8), # Above curve
'Taiyuan': (-45, -12), # Left and below
'Mahia': (5, 8), # Above curve
'Alaska': (5, -15), # Below curve
'Baikonur': (5, 8), # Above curve
}
for name, site in LAUNCH_SITES.items(): for name, site in LAUNCH_SITES.items():
abs_lat = abs(site.latitude) abs_lat = abs(site.latitude)
site_temp = LaunchSite(site.name, abs_lat) site_temp = LaunchSite(site.name, abs_lat)
@@ -559,12 +574,14 @@ def plot_latitude_effects(
ax.plot(abs_lat, result['fuel_ratio'], 'mo', markersize=8) ax.plot(abs_lat, result['fuel_ratio'], 'mo', markersize=8)
# Simplified label # Simplified label
label = site.name.split('(')[0].strip() label = site.name.split('(')[0].strip()
# Get custom offset for this site, default to (5, 8)
offset = label_offsets.get(name, (5, 8))
ax.annotate(label, (abs_lat, result['fuel_ratio']), ax.annotate(label, (abs_lat, result['fuel_ratio']),
textcoords="offset points", xytext=(3, 3), fontsize=8, rotation=15) textcoords="offset points", xytext=offset, fontsize=11)
ax.set_xlabel('Latitude |φ| (°)', fontsize=12) ax.set_xlabel('Latitude |φ| (°)', fontsize=12)
ax.set_ylabel('Fuel / Payload Mass Ratio', fontsize=12) ax.set_ylabel('Fuel / Payload Mass Ratio', fontsize=12)
ax.set_title(f'Fuel Requirement vs Launch Latitude{title_suffix}', fontsize=13) # ax.set_title(f'Fuel Requirement vs Launch Latitude{title_suffix}', fontsize=13)
ax.grid(True, alpha=0.3) ax.grid(True, alpha=0.3)
ax.set_xlim(0, 65) ax.set_xlim(0, 65)