Documents / Official release

Gemini 7 Technical Debriefing, 1965

National Aeronautics and Space Administration · 1965 · 222 pages · text from the file's own layer

This is a preliminary transcript of the Gemini 7 technical debriefing, dated December 23, 1965, from the National Aeronautics and Space Administration. It was made from tape recordings of the crew debriefing held December 19 to 21, 1965 at the Crew Quarters, Cape Kennedy, Florida. In it, Frank Borman and Jim Lovell go through countdown, powered flight, insertion, station keeping with the booster, systems, experiments and training. The table of contents also lists a section on visual sightings during orbital flight.

From the source:Release of 2026-06-12 Incident: December 19-21, 1965, Cape Kennedy, Florida. This document is a preliminary transcript derived from voice recordings of the Gemini 7 flight crew debriefing conducted December 19-21, 1965, at the Crew Quarters, Cape Kennedy, Florida. Lights and flashes are mentioned and there is discussion about having proper illumination for vehicle docking. Borman and Lovell discuss celestial and terrestrial observational anomalies and note sightings of Mercury, meteors, aurora, and lightning. They also discuss not being able to see any stars once the Sun comes up.

  • p. 124 …Lovell We never had any l arge amounts of dandruff or anything floating around. Borman The…
1JO
pitch down at guidance initiate. Attitude indications were
nominal all the way through. At insertion , the nomi nal
velocity on address 72 was 25,804 and when we read it up, i t
read 25,804 . The orbit maneuvers using the computer and
the platform were right on the money. The accelerometer
bias did not vary, and we burned them off on the IVI 1 a by
insert i ng them through the MDIU, and it came out very well .
I did not burn on time , we burned on t he IVI 's.
Borman The updates were all made in the PRELAUNCH mode as agreed on
before fl i ght . There was no problem, no mi sunderstanding,
I think F0D did very well i n this regard. I know t hat in
Gemini 5 t here was a little mix-up, but we had none of that.
Borman Retrofire occurred automatically at the exact second. All
four Retros f ired and the IRS was right on the money. Reentry
guidance was nominal. I t was very s i mi lar to the s i mulations
that we had f l o.m. There was one little anomaly in the guid
ance, i n t hat we were gi ven back-up reentry angles of
50 degrees. We computed wi th our onboard char t s a reentry
angle of 50 degrees, back-up angle of 50 degrees. But t hen
after tracking, the ground called up a 35 degrees which proved
to be closer to what we actually f l ew. I am still not aware
of the reason for change; why it changed from 50 degrees t o
35 degrees. The important t hing i s t hat it did change and the
ground was able to update u s in real time, and it agreed very
well with the a

About this file

Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 222 pages are in the text index: search them above, or from the library's search.