2004-049A
Second generation Franco-German recon sat, by Astrium (Matra Marconi Space/Toulouse). Launch by Ariane 5 with ASAP5 carrying Nanosat, Parasol, Essaim 1-4 into a 665 x 666 km x 98.1 deg orbit. The EPS depletion lowered the rocket stage's perigee to 608 km, while the ASAP payloads had slightly lower perigees than Helios, between 650 and 657 km.
Mass 4200 kg. Size 6.0 x 3.7 x 3.4m
Resolution is believed to be 0.5m.
| Helios 2A | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| T-0:07 EPC MES | |||
| 2004 Dec 18 | 1626 | T+0:00 Launch by Ariane 5G+ 520 (V165) | CSG ELA3 |
| 1628:10 | 62 km, 2.04 km/s | -6180 x 90 ? | |
| T+2:14 EAP sep at 72 km | |||
| 1629:15 | 118 km, 2.21 km/s | -6130 x 150 ? | |
| 1629:21 | T+3:21 Fairing sep | ||
| 1630:20 | 160 km, 2.5 km/s | -6100 x 200 ? | |
| 1634 | 205 km, 4.5 km/s | -5100 x 300? | |
| 1635 | T+9:47 EPC MECO | ||
| T+9:53 EPC sep at 361 km | -2500 x 600 ?? | ||
| 1635:59? | T+9:59 EPS burn | ||
| 1637:20 | 477 km, 6.55 km/s | -2500 x 600 ? | |
| 1646 | -1800 x 750 ? | ||
| 1651 | Perigee positive? | ||
| 1652 | T+26:54 EPS MECO at 680 km | ||
| 1658? | EPC impact Arctic | ||
| 1726 | T+1:00:01 Helios 1A sep | ||
| 1732 | T+1:06:08 Nanosat sep | ||
| 1732 | T+1:06:29 ESSAIM 1 and 4 sep | ||
| 1732 | T+1:06:30 ESSAIM 2 and 3 sep | ||
| 1734 | T+1:08:27 Parasol sep | ||
| 2004 Dec 19 | 0221 | 98.06 665 x 666 x 98.1 | |
| 2004 Dec 22 | Raise orbit | 98.34 677 x 689 x 98.1 | |
| 2004 Dec 25 | 98.39 680 x 682 x 98.1 | ||
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