Explorer 19

 1963-053A

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S-056B was given the alternate name AD-A (Air Density Explorer A) in the new naming scheme. After launch, it got the name Explorer XIX. Launch was at 1849:25 on 1963 Dec 19, by Scout X-4 from Launch Complex D at Point Arguello Naval Missile Facility. It was inserted into a 590 x 2934 km x 78.6 deg orbit at 1858. Planned orbit had been 596 x 2994 km.

AD-A
Date	Time	Event	Orbit
1963 Dec 19	1849:25	Launch by Scout X-4	NMFPA LC-D
		T+1:08 St 1 Algol burnout
		T+1:25 St 2 Castor burn
		T+2:07 St 2 burnout
		T+2:13 Fairing sep
		T+2:13 St 3 Antares burn
		T+2:45 St 3 burnout
		T+9:40 St 3 sep
	1859:06	T+9:41 St 4 Altair 2 burn
	1859:31	T+10:06 Stage 4 burnout
	1913:36s	T+24:11 Canister opened
		Balloon inflated
	1918:05s	T+28:40 Balloon separation
1963 Dec 21	0454		115.79 592 x 2390 x 78.6
1967 Nov 21			113.60 736 x 2046 x 78.8
1971 Mar 21			112.23 938 x 1719 x 79.9
1973 Sep 27			111.37 722 x 1856 x 78.8
1977 Aug 26			110.67 887 x 1627 x 79.8
1981 Mar 25			100.45 636 x 913 x 78.7
1981 May 10			90.11 258 x 300 x 78.7
1981 May 10		reentered

Payload:

• Canister

• Radio beacon

• 3.6m Mylar balloon