Saturday, February 19, 2000
Thursday, February 17, 2000
Wednesday, February 16, 2000
Kosmos 720
1975-019A
Kosmos-720 flew in a 62.8 deg orbit from Mar 21 to Apr 1; TLEs for Apr 1-3 refer to an ejected object,possibly a sensor cover.
| Kosmos-720 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1975 Mar 21 | 0650? | Launch by Soyuz | Plesetsk |
| 0654? | Blok-I burn | ||
| 0658? | Blok-I sep | ||
| 1975 Mar 21 | 89.3 212x273x62.8 | ||
| 1975 Mar 31 | 89.25 210 x 265 x 62.8 | ||
| 1975 Apr 1 | |||
| 0440? | Deorbit | ||
| 0450? | PO sep | ||
| 0459? | Entry | ||
| 0512? | Landed | ||
Monday, February 14, 2000
IRDT
2000-009B
The 110 kg demonstrator is deorbited after 5 orbits and deploys an inflatable shield during reentry. The initial shield is 0.8 x 0.7m in size, and inflates with He to 2.4m diameter and then during braking to 3.6m diam.
The IRDT consists of a conical front shield, the inflation system, the TRD shield, a cylindrical payload canister, and a cylindrical adaptor.
The demonstrator carries the 'Stone 2' experiment with basalt, dolomite and cement-carbonate samples embedded in the heat shield to study heating effects on meteorites.
Landing is in Orenburg zone, Russia
The demonstrator shield, built by Lavochkin, was originally to be used in Mars-96.
Fregat's shield, the Fregat Rescue System, inflates to 14m dia.
The Inflatable Reentry and Descent Technology Demonstrator flies on Soyuz/Fregat in 2000. The Fregat demo flight places itself, the test vehicle, and the attached DASA Mission 2000 payload in orbit. After 8 hours it deorbits and deploys an inflatable thermal shield. The shield is built by Lavochkin. Landing in Kazakhstan. [509] The shield is 8m dia stage 1, 14-m diameter stage 2.
The demonstrator payload also deorbits with a smaller inflatable shield 4-m diameter
2 burns to prove Cluster, and 2 burns for reentry.
IRDT has a mass of 111 kg. Diameter 0.8m initial, 2.3m stage 1, 3.8m stage 2. Landed at 53E 51N. Stage 2 did not deploy and impact was at 60 m/s. Total mass was 112 kg (plus the 33 kg small NTU).
In Russian the inflatable heat shield is called NTU:
\uni{ надувного тормозного устройства }{ }
(\uni{ НТУ)}{ }
| Fregat | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2000 Feb 8 | 2320:00 | Launch | KB LC31 |
| T+1:58 Strapon sep | |||
| T+2:54 GO sep | |||
| T+4:47 Blok A sep | |||
| T+5:21 Interstage sep | |||
| 2328:45 | T+8:45 MECO | ||
| T+8:49 Blok I sep | -1200 x 180? x 64.9 | ||
| T+8:54 Fregat SOZ burn 195s 0.53 km/s | |||
| T+9:49 Fregat MES-1 | |||
| 2333:04 | T+13:04 Fregat MECO-1, transfer orbit | 168 x 564 x 64.9 | |
| 2336? | Blok I reentry | ||
| 2000 Feb 9 | 0022:00 | T+1:02:00 Fregat SOZ-2 | |
| 2000 Feb 9 | 0022:55 | T+1:02:55 Fregat MES-2 | |
| T+1:03:35 Fregat MECO-2 | 590 x 613 x 64.9 | ||
| 0023:48 | T+1:03:48 GM (Dummy mass) sep | ||
| 0641:46 | T+7:21:46 SOZ-3 | ||
| T+7:22:41 Fregat Burn 3, lower peri | |||
| T+ 7:23:17 Fregat MECO-3 at 582 km | 151 x 601 x 64.9 | ||
| 0728:43 | T+8:04:43 SOZ-4 | ||
| 0729:38 | T+8:09:38 MES-4 | ||
| 0737:49 | T+8:17:49 MECO-4 at 135 km | -4300 x 180 x 64.9 | |
| 0738:11 | T+8:18:11 Demo RV sep | ||
| 0738:31 | T+8:18:31 Adapter sep from Fregat | ||
| Shield deploy at 50 km | |||
| T+8:19:45 Entry | |||
| 0757 | T+8:35s Impact at 13m/s | ||