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bes-dev / sssp

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NASA Space Shuttle Synthesis Program (1970) - Revived. FORTRAN IV ported to gfortran, simulates real Space Shuttle launch to orbital velocity.

19
0
100% credibility
Found May 06, 2026 at 19 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
Fortran
AI Summary

A modern revival of a 1970 NASA program that simulates Space Shuttle ascent trajectories to orbit, with tools for optimization, plotting, and 3D visualizations.

How It Works

1
🔍 Discover the Simulator

You find this fun project that revives a 1970 NASA program to simulate real Space Shuttle launches to orbit.

2
🛠️ Get Your Mac Ready

Install a few free helper tools so your computer can run the old NASA simulation smoothly.

3
⚙️ Awaken the Program

Follow one simple preparation step to make the vintage NASA code ready for action on your modern Mac.

4
🚀 Launch the Shuttle

Start the simulation with real shuttle data and watch it calculate the full ascent from liftoff to orbital speed.

5
📊 Read the Flight Path

See a detailed printout of the shuttle's journey, showing time, height, speed, angle, and weight at key moments.

6
🖼️ Make Cool Visuals

Create graphs, 3D Earth views, animations, and maps to see the shuttle's path in exciting ways.

🎉 Orbit Achieved!

You've relived a real Space Shuttle launch using authentic 1970s NASA math, complete with plots and videos.

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Star Growth

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AI-Generated Review

What is sssp?

This GitHub repo revives a 1970 NASA Space Shuttle Synthesis Program from the NASA space center Houston, ported from FORTRAN IV to modern gfortran for macOS. It simulates real NASA space shuttle launches to orbital velocity, handling trajectories, weights, aerodynamics, SRB separation, and MECO with gravity turns and pitch schedules. Build via Makefile, feed input files, and output ASCII tables, plots, 3D animations, or KML/CZML exports for Google Earth or Cesium viewers—Python helpers use numpy, scipy, and matplotlib.

Why is it gaining traction?

Unlike modern sims, it runs original NASA code from the NASA space flight era, calibrated to match real STS data within 1-5%, hitting 7,803 m/s orbit. Standout hooks: quick-start make run for instant liftoff prints, scipy optimizers to tweak weights/aero for custom missions, and polished visuals like flight envelopes vs. actual NASA space pictures. Echoes NASA GitHub open source gems like fprime, cfs, or apollo 11 repos, blending history with usable tools.

Who should use this?

Aerospace engineers prototyping shuttle-like ascents or validating orbital mechanics. Space sim hobbyists scripting what-if launches from NASA space center Florida pads. Students or historians diving into 1970s NASA space shuttle design, optimizing params like thrust or alpha for classroom demos.

Verdict

Niche educational gem for NASA space shuttle fans—try it for the thrill of 50-year-old code reaching orbit, but 19 stars and 1.0% credibility score signal early-stage maturity despite solid docs. Pair with NASA GitHub repos like jeod or rover for deeper space sim stacks.

(198 words)

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