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astronautix.com Atlas IIAS

Atlas 2AS
Atlas 2AS - Atlas 2AS - AC-108 - COSPAR 1993-077

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Family: Atlas. Country: USA. Status: Hardware.

The Atlas II booster was 2.7-meters longer than an Atlas I and included uprated Rocketdyne MA-5A engines. The Atlas I vernier engines were replaced with a hydrazine roll control system. The Centaur stage was stretched 0.9-meters compared to the Centaur I stage. Fixed foam insulation replaced Atlas I's jettisonable insulation panels. Higher performance RL10A-4 (or RL10A-4-1) engines replaced Atlas II's RL10A-3-3A engines. RL10A-4 and RL10A-4-1 engines were offered with or without extendable nozzles (Extendible nozzles increased the engines specific impulse, providing additional performance if required). The Atlas IIAS model added four Thiokol Castor IVA solid rocket boosters (SRBs) to the core Atlas stage to augment thrust for the first two minutes of flight. The first SRB pair was ignited at liftoff and burned for 54 seconds. The second pair was ignited in flight when vehicle loading constraints were satisfied. Both pairs were jettisoned shortly after their respective burnouts. The first Atlas IIAS successfully launched AC-108 / Telstar 401 on 15 December 1993.


Specifications

Launches: 20. Failures: 0. Success Rate: 100.00% pct. First Launch Date: 16 December 1993. Last Launch Date: 14 July 2000. LEO Payload: 8,610 kg. to: 185 km Orbit. at: 28.5 degrees. Payload: 3,630 kg. to a: Geosynchronous transfer trajectory. Liftoff Thrust: 361,620 kgf. Total Mass: 234,000 kg. Core Diameter: 4.9 m. Total Length: 47.5 m. Launch Price $: 105.00 million. in 1994 price dollars.


Atlas IIAS Chronology


1993 Dec 16 - - 00:38 GMT. LV Configuration: Atlas IIAS (4N) s/n AC-108 / Centaur II s/n 8201. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1994 Oct 6 - - 06:35 GMT. LV Configuration: Atlas IIAS (4N) s/n AC-111 / Centaur II s/n 8202. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1995 Jan 10 - - 06:18 GMT. LV Configuration: Atlas IIAS (1N) s/n AC-113 / Centaur II s/n 8203. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1995 Mar 22 - - 06:18 GMT. LV Configuration: Atlas IIAS (1N) s/n AC-115 / Centaur II. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1995 Aug 29 - - 00:53 GMT. LV Configuration: Atlas IIAS (1N) s/n AC-117 / Centaur II. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1995 Dec 2 - - 08:08 GMT. LV Configuration: Atlas IIAS (4N) s/n AC-121 / Centaur II. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1996 Feb 1 - - 01:15 GMT. LV Configuration: Atlas IIAS (4N) s/n AC-126 / Centaur II. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1997 Feb 17 - - 01:42 GMT. LV Configuration: Atlas IIAS (1N) s/n AC-127 / Centaur II. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1997 Jul 28 - - 01:15 GMT. LV Configuration: Atlas IIAS (1N) s/n AC-133. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1997 Sep 4 - - 12:03 GMT. LV Configuration: Atlas IIAS (1N) s/n AC-146. Launch Site: Cape Canaveral . Launch Complex: LC36A.
1997 Oct 5 - - 21:01 GMT. LV Configuration: Atlas IIAS (1N) s/n AC-135. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1997 Dec 8 - - 23:52 GMT. LV Configuration: Atlas IIAS s/n AC-149. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1998 Feb 28 - - 00:21 GMT. LV Configuration: Atlas IIAS s/n AC-151. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1998 Jun 18 - - 22:48 GMT. LV Configuration: Atlas IIAS s/n AC-153. Launch Site: Cape Canaveral . Launch Complex: LC36A.
1999 Feb 16 - - 01:45 GMT. LV Configuration: Atlas IIAS s/n AC-152. Launch Site: Cape Canaveral . Launch Complex: SLC36A.
1999 Apr 12 - - 22:50 GMT. LV Configuration: Atlas IIAS s/n AC-154. Launch Site: Cape Canaveral . Launch Complex: SLC36A.
1999 Sep 23 - - 06:02 GMT. LV Configuration: Atlas IIAS s/n AC-155. Launch Site: Cape Canaveral . Launch Complex: SLC36A.
1999 Dec 18 - - 18:57 GMT. LV Configuration: Atlas IIAS s/n AC-141. Launch Site: Vandenberg . Launch Complex: SLC3E.
2000 Feb 3 - - 23:39 GMT. LV Configuration: Atlas IIAS s/n AC-158. Launch Site: Cape Canaveral . Launch Complex: SLC36B.
2000 Jul 14 - - 05:21 GMT. Launch Site: Cape Canaveral . Launch Complex: SLC36B.

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Last update 12 March 2001.
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