2004-050A
The HLV-OLDSP Heavy Lift Vehicle Operational Launch Service Demonstration Payload (DemoSat) is a 5993 kg 1.95m high x 1.38m dia cylindrical test payload to record launch environment.
The Delta IVH has three LOX/LH2 RS-68 powered CBC stages in tandem and a 5-m D4HSS and 5m fairing. The vehicle is 71.6m tall and has a launch mass of 720t. Cargo capacity is 23t to LEO. Launch thrust is 8700 kN. This was the first flight of the 5-meter diameter upper stage. The CBCs cut off 8s early leading to long SES-1 and SES-2 burns, and the second stage ran out of fuel in the third burn. The post-SECO-1 orbit was marginal, with an apogee of around 105 km,
The Demosat carried USAF-STP's University Nanosat-2, two separating payloads built by ASU and UCoBoulder and integrated by AFRL/VS, and was to have tested low shock satellite separation systems. The satellites were dispensed afte SECO-1 and reentered in less than one orbit.
| Delta 4H | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2004 Dec 21 | 2150:00 | Launch | SLC37B |
| T+0:50 Center RS-68 to 57 percent thrust | |||
| T+3:55 Outboard RS-68 to 57 percent | |||
| T+4:00 Outboard CBCs MECO (8s early?) | |||
| T+4:08 Outboard CBCs sep 75 km | |||
| T+4:08? Center RS-68 to 102 percent | |||
| T+4:50? 101 km | |||
| T+5:30 Center CBC MECO 149 km | |||
| 2155 | CBC sep | ||
| 2155:53 | T+5:53 RL10B-2 SES-1 129 km | ||
| 2156:03 | T+6:03 5-m fairing sep 134 km | ||
| 2203:17? | RL10B-2 SECO-1 | ||
| 2206:52 | T+16:52 Nanosat stack sep in low orbit | 105 x 196 km |
| 2210:29 | T+20:29 RL10B-2 SES-2 | ||
| 2218:32 | T+28:32 RL10B-2 SECO-2 | 185 x 35788 x 27 | |
| 645.30 288 x 36428 x 27.2 | |||
| 2235 | Nanosats at 120 km | ||
| 2246? | Nanosat perigee? | ||
| 2004 Dec 22 | 0327:13 | T+5:37:13 RL10B-2 SES-3 | |
| 0330:28 | T+5:40:28 RL10B-2 SECO-3 | ||
| 0339:37 | T+5:49:37 Demosat sep | ||
| 0345:45 | T+5:55:45 CCAM | ||
| T+5:57:55 CCAM end | |||
| 2005 Jan 7 | 1044.67 19032 x 36420 x 13.5 | ||
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