NOAA 10

 1986-073A

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NOAA G (NOAA 10), an Advanced Tiros N satellite, was launched on 1986 Sep 17 at 1552 by Atlas E from Vandenberg. This was the first use of the Atlas E for NOAA satellites. NOAA 10 reached an 809 x 827 km x 98.8 deg orbit. It replaced NOAA 6 and 8.

NOAA 10
Date	Time	Event	Orbit
1986 Sep 17	1552:00	Launch by Atlas E
		T+2:01 BECO
		T+2:04 BPJ Booster Package Jettison
		T+2:31 NFJ Nose Fairing Jettison
		T+5:21 SECO
		T+5:40 VECO
	1557:46	T+5:46 Atlas sep	-2850? x 810? x 98.7
	1605:36	T+13:36 Star 37 burn
	1606:20	T+14:20 Star 37 burnout
		T+14:25 RCS start
		T+14:40 RCS stop
		T+17min? Hydrazine blowdown
		T+35min arrays and booms deployed
1986 Sep 17			101.22 807 x 825 x 98.75
1986 Oct 7		AVHRR operational
1986 Oct 30			101.23 806 x 827 x 98.74
1986 Nov 17		Operational service
1987 Jan 7		TOVS operational
1991 Sep 17		On standby, replaced by NOAA 12

USA-81

 1992-023A

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The third Titan 23G test payload was launched in Apr 1992. It was discovered shortly after launch by R. Kracht in an orbit similar to that of USA 32 but in an orbital plane displaced by 90 degrees. This satellite was registered with the UN, with a low parking orbit of 145 x 175 km given. This may be the orbit of the Titan rocket just prior to reentry, rather than the actual parking orbit of the payload.

USA 81
Date	Time	Event	Orbit
1992 Apr 25	0853	Launch by Titan 23G	V SLC4W
		T+2:30? Stage 1 sep
		T+2:30? Stage 2 burn
		T+3:45? Fairing
		T+5:25? Stage 2 MECO
	0858?	T+5:30? Stage 2 sep
1992 Apr 25			89.1 147 x 175 x 85.0 (UN)
1992 Apr 25		Orbit raise 1
1992 Apr 25		Orbit raise 2
1992 May 11			100.77 788 x 801 x 85.03