1963 NASA IBM Gemini Inertial Guidance 6-DOF Re-Entry Simulation Report FORTRAN For Sale

An Analysis of Six Degrees of Freedom Re-entry Simulation Report (Analysis Report No. 7)Publisher/Author: IBM Federal Systems Division, Space Guidance Center (Owego, New York)Target Spacecraft: NASA Gemini Spacecraft (Inertial Guidance & Control System)

ITEM OVERVIEW:Up for sale is a rare and original technical simulation document produced by IBM for NASA's Project Gemini. Prepared at the IBM Space Guidance Center in Owego, NY, this document details the mathematical algorithms, physics modeling, coordinate transformations, and FORTRAN code listings used to simulate six-degrees-of-freedom (6-DOF) spacecraft re-entry and attitude control.

UNIQUE HISTORICAL FEATURES:

• Working Notes & Annotation: This copy features extensive handwritten pencil notes, mathematical flow diagrams, array corrections, and physical parameters added post-publication by a guidance systems engineer.

• Fold-Out Diagrams: Features numerous large, multi-page fold-out schematics detailing complex engineering math flows and logic loops.

• Complete FORTRAN Listings: Includes complete source listings for key flight control subroutines (such as Subroutine 6, Subroutine 10, and Subroutine 12).

• Detailed Technical Diagrams: Hand-drawn math flows, attitude jet layouts, deadband graphs (+/-1 deg/sec threshold), and coordinate system transformations.

• Physical Constants Table: Includes real capsule data parameters (jet torques, thrust levels, mass centroids, moments of inertia Ix, Iy, Iz, total craft weight ~4429.56 lbs, Earth rotation rates, etc.).

• Original Distribution List: Lists delivery to key IBM Owego/Bethesda staff and McDonnell Aircraft Corporation (MAC) engineers.

PHYSICAL CONDITION:

• Binding: Original black comb/spiral binding in intact condition.

• Covers: Original IBM Federal Systems Division paper stock; light shelf wear on edges/corners consistent with age.

• Pages: Clean interior pages with legible print and original handwritten working annotations throughout.

• Thickness: Measures approx. 1" thick.

A fantastic piece of early manned spaceflight, digital computing, and NASA software engineering history.