2001-029A
The second ESA heavy communications technology satellite was the SAT-2/DM Advanced Relay Technology Mission (Artemis) was built by Alenia Spazio for ESA using the Italsat bus. Originally scheduled for launch in 1996 [693], the DRS precursor technology mission was delayed until 2000 and oriented to mobile and inter-satellite communications. In 1996 it was moved from Ariane 5 to the Japanese H-IIA, but was later moved back again after H-II delays. Mass is 3105 kg full. Size is 4.8h 8.0wide (with antennas) and 25m span.
4.86 x 2.85 x 2.95m, span 24.73m.
Artemis was placed above SYLDA, which contained BSAT-2B.
Artemis together with Inmarsat 3 AOR and IOR provides the EGNOS European GPS augmentation. It opeated as an IOR-W (Congo) satellite.
The S400 LAE will perform GEO insertion; relocation will be done by the set of 10N RCS biprop thrusters attached to the S400. Biprop load is 1538 kg. Ion propulsion will be used for NSSK. Artemis carries two DASA RIT-10 thrusters and two MMS EIT T5 thrusters with 40 kg of Xe. Isp is 3000s and thrust is 20mN. Deduced dry mass is 1527 kg.
The EPS stage only got to 80 percent of planned thrust and cutoff 1min 20sec early, because of a combustion instability in the Aestus engine. Designers annouced that mixing the propellant more slowly would fix the problem.
Artemis was later raised to a 30900 x 30940 km orbit, significantly below geosynchronous, and then finally by Feb 2003 to GEO.
Avanti bought the satellite in 2014 and in 2016 relocated it to 123E under a contract from the Indonesian ministry of defence, preserving Indonesia's rights to the old Garuda-1.
| Artemis | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2001 Jul 12 | 2158:00 | Launch by Ariane 5G | CSG ELA3 |
| T+0:07 Liftoff | |||
| T+2:24 EAP sep | |||
| T+3:25 Fairing sep | |||
| 2207:59 | T+9:59 EPC cutoff | ||
| 2208:06 | T+10:06 EPC sep | ||
| 2208:28 | T+10:28 EPS burn | ||
| 2208:31 | T+10:31 Aestus problem, 80 percent thrust | ||
| 2223:28 | T+25:28 Aestus cutoff early | ||
| T+26:48 Aestus cutoff due | |||
| 2226 | T+28:06 Artemis sep | ||
| 2228 | T+29:58 Sylda 5 sep | ||
| 2233 | T+35:35 BSAT-2b sep | ||
| 2001 Jul 14 | 318.48 592 x 17548 x 2.9 | ||
| 2001 Jul 18 | 1519 | Perigee burn 1 | 345.35 609 x 19245 x 3.0 |
| 2001 Jul 19 | Perigee burn 2 | ||
| 2001 Jul 19 | Perigee burn 3 | ||
| 2001 Jul 20 | Perigee burn 4 | ||
| 2001 Jul 20 | Perigee burn 5 | ||
| 2001 Jul 21 | 1432 | 546.86 660 x 30886 x 2.9 | |
| 2001 Jul 22 | Apogee burn 1 | ||
| 2001 Jul 22 | 1211 | 579.84 2446 x 30864 x 2.2 | |
| 2001 Jul 23 | Apogee burn 2 | ||
| 2001 Jul 24 | Apogee burn 3, parking orbit | ||
| 2001 Jul 27 | 1553 | 1195.43 30902 x 30964 x 0.8 | |
| 2001 Aug 12 | 1195.18 30897 x 30958 x 0.8 | ||
| 2001 Dec 4 | 1194.85 30901 x 30941 x 0.8 | ||
| 2002 Feb 20 | Ion thruster burns resume | ||
| 2002 Feb 21 | 1195.50 30921 x 30948 x 1.0 | ||
| 2002 Mar 31 | 1206.45 31118 x 31205 x 1.0 | ||
| 2002 Apr 24 | 1222.75 31415 x 31583 x 1.0 | ||
| 2002 Jul 18 | 1284.11 32678 x 32833 x 1.1 | ||
| 2002 Aug 30 | 1312.77 33289 x 33384 x 1.2 | ||
| 2002 Sep 27 | 1330.09 33628 x 33741 x 1.2 | ||
| 2002 Oct 27 | 1353.26 34073 x 34225 x 1.3 | ||
| 2002 Nov 26 | 1378.52 34589 x 34714 x 1.4 | ||
| 2002 Dec 5 | 1386.40 34770 x 34845 x 1.4 | ||
| 2003 Jan 3 | 1409.15 35224 x 35290 x 1.5 | ||
| 2003 Jan 17 | 1421.28 35488 x 35504 x 1.5 GEO 7.0W+3.7E | ||
| 2003 Jan 31 | 1432.32 35664 x 35760 x 1.6 GEO 21.2E+1.0E | ||
| 2003 Feb 5 | 1436.29 35494 x 36086 x 1.5 GEO 21.0E | ||
| 2006 Aug 1 | 1436.11 35776 x 35797 x 4.8 GEO 21.4E | ||
| 2009 Jun 1 | 1436.08 35772 x 35799 x 7.4 GEO 21.5E | ||
| 2015 Feb 15 | AVANTI takes over operation | ||
| 2016 Apr 22 | 1436.06 35773 x 35798 x 12.3 GEO 21.3E | ||
| 2016 May 20 | 1436.06 35775 x 35795 x 12.3 GEO 20.7E | ||
| 2016 May 25 | Move out | 1434.42 35732 x 35775 x 12.3 GEO 24.2E+0.5E/d | |
| 2016 Nov 17 | Move in 123E | 1436.06 35772 x 35799 x 12.5 GEO 123.0E | |
| 2017 Oct 29 | 1436.17 35776 x 35800 x 12.9 GEO 123.2E | ||
No comments:
Post a Comment