Gemini 7 Technical Debriefing, 1965

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71
by the thrusters.
The scanners worked great except at sun­
rise and sunset.
Lovell
They woul d l ose lock•••
Borman
Sometimes they wouldn't lose lock but, remember, they drove
the spacecraft nose down.
About 40° pitch down.
Lovell
The one big thing, which wa.s the question in all our minds,
actually b•PP4D•d,
Another spacecraft nearby will interrupt
the HORIZON SCAN mode.
Borman
Right.
Lovell
It does effect the scanner operation, so it i s something you
have to take in consideration.
Borman
That' s right. When 6 got between us a.nd tha aun, the scan­
ners were inoperative and lost lock. PLA'Tlt'ORM mode worked
excellently when we had it, and we 'll.lled it to align the
first two time ■ we had the platform.
I think that you can
do a finer job, and, you can a lign the platform more closely
manually. Thie is because the deadband on the PLA.TFOlffl mode
i a l arger than you can control manually. But it certainly
i a a worthwhile mode and for station keepin&' it is a super­
ior type of operation. Tra.nal&tion maneuver• at apacecr&ft
aepa.ra.tion at SECO + 30--I did not hear the thrusters. I
jwst thrwsted.
Jim hit the SEP spacecraft. Did you hear
the thru.aters?