2000-041A
Cluster FM7 (C3) was launched with FM6.
Each of the 4 wire booms extends to 43m long.
In early 2001, the vehicles studies the polar cusp. In May 2001, the spacecraft began to increase their separation distance from 600 to 2000 km, to study larger features in the magnetotail.
In Feb 2004, the Cluster spacing was 250 km to study small structures.
In early 2007 the spacing was 450 km between Samba and Tango, and 10000 km to Rumba and Salsa. The spacing was shrunk further and on 2007 Jun 20, Samba and Tango reached a 17 km separation.
| Cluster FM7 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2000 Jul 16 | 321.30 250 x 18072 x 64.68 | ||
| 2000 Jul 17 | 1121:01 | Burn 1 | 422.67 245 x 24311 x 64.88 |
| 2000 Jul 18 | 0833 | Burn 2 | 616.81 241 x 35007 x 65.10 |
| 2000 Jul 19 | 0515 | TCM-3 10 min | 241 x 57010 x 65.1 |
| 2000 Jul 19 | 2325 | TCM-4 10 min | 246 x 119523 x 64.9 |
| 2000 Jul 21 | 0004 | TCM over VILSPA | 16869 x 121098 x 90 |
| 2000 Oct | Boom deploy | ||
| 2001 May 10 | Manuevers begin | ||
| 2006 | C3 and C4 moved to similar orbits | ||
| 2010 Jul 21 | 1923 | TCM | |
| 2010 Jul 30 | 2040 | TCM | |
| 2010 Sep 2 | 1919 | TCM | |
| 2010 Sep 7 | 0754 | TCM | |
| 2013 Jul 15 | New close formation | ||
| 2015 Nov 1 | Samba burn to move closer to Tango | ||
| 2015 Nov | Samba and Tango within 4 km | ||
Payload:
- WBD Wideband data analyser, E field to 100 kHz
- EFW Electric field and wave, 50 m antennae
- STAFF Spatio temporal analysis of field fluctuation
- FGM Fluxgate magnetometer
- EDI Electron drift instrument
- PEACE Plasma electron and current experiment
- CIS Cluster Ion spectrometer
- RAPID Research with adaptive particle imaging detectors
- WHISPER Waves of high frequency and sounder for probing of electron density by relaxation;
- DWP Digital wave processor
- ASPOC Active spacecraft potential control experiment.
2000-041B
Cluster FM6/C2 is the first of three brand-new replacement Cluster satellites. It was launched with FM7 in Jun 2000.
Cluster has 4 50-m wire antennae, two 5-m rigid booms, 2 axial comm antenna booms. 550 kg dry, 650 kg prop, 1.3 h, 2.9dia. The spacecraft spins at 50 rpm.
Fregat had thrust of 19.6 kN with Isp of 328.5s. Taking the upper values, a 3:45 initial burn corresponds with a prop burn rate of 19.6/3.22 = 6.08 kg/s to 1367 kg. The 9:42 second burn is 3538 kg for a total fuel use excluding deorbit burn of 4905 kg. In fact the nominal prop load was 5350 kg for Fregat,
Mass 6450 full 1100 kg dry, with payload 2400 kg.
Burn 1: 8850 to 7483 kg Est Dv = 540 Burn 2: 7483 to 3945 kg Est Dv = 2061 Actual Dv = 1940? Burn 3: 1545 to 1100 kg Est Dv = 1094
So the burn 2 values agree quite well.
Actual info found in another doc for mission 2
Burn 1: 7837 to 6810 kg est DV = 452 Burn 2: 6810 to 3840 est DV = 1845 Burn 3: 1440 to 1261 est DV = 427, actual DV less
In May 2001, the spacecraft began to increase their separation distance from 600 to 2000 km.
Note that the early TLE orbit data for FM6 and FM8 are swapped.
| Cluster FM6 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2000 Jul 16 | 1239:34 | Launch by Soyuz/Fregat | KB |
| 1241:34 | Strapons sep | ||
| 1242 | Fairing | ||
| 1244:24 | Blok-A sep | ||
| 1244:24 | Blok-I burn | ||
| Fairing sep | |||
| Blok-I MECO | SO x 64.8 | ||
| T+8:48 Blok-I sep | -1120? x 217 x 64.8 | ||
| 1249 | T+8:50? Fregat burn 1 3:45 | ||
| 1251 | Fregat MECO-1 | 217 x 217 x 64.8 | |
| 1257? | Blok I reentry | ||
| 1355:42 | T+1:15:00 Fregat burn 2, 9:42 | ||
| 1403 | Fregat MECO-2 | 251 x 18050 x 64.8 | |
| 1410 | S+0 FM7 sep | ||
| 1410 | S+10s FM6 sep | ||
| 2000 Jul 16 | 321.54 259 x 18078 x 64.81 | ||
| 2000 Jul 16 | 1640? | Fregat deorbit at apogee | |
| 2000 Jul 16 | 1916? | Fregat reentry | -47? x 18058 x 64.8 |
| 2000 Jul 17 | 1121:00 | Apogee raise 1, 10:33 | |
| 1131 | 424.06 247 x 24390 x 64.89 | ||
| 2000 Jul 18 | 0828 | Apo raise 2 | 625.10 261 x 35417 x 65.10 |
| 2000 Jul 19 | 0508 | Apo raise 3 | 250 x 56677 x 64.9 |
| 2000 Jul 19 | 2259 | TCM-4 | 246 x 119523 x 64.9 |
| 2000 Jul 20 | 2302 | TCM-5 18min over PERTH | 16869 x 121098 x 90.5 (ESA) |
| 2000 Jul 20 | ASPOC and CIS covers open | ||
| 2000 Jul 22 | 16714 x 121090 x 90.48 | ||
| 2000 Sep 5 | Boom deploy begin to 15m | ||
| 2000 Sep 11 | s | Deploy to 35m | |
| 2000 Sep 20 | s | Deploy to 43m | |
| 2001 May 10 | Manuevers begin | ||
| 2006 | Move to tetrahedral config | ||
| 2010 Jul 20 | 2020 | TCM | |
| 2010 Jul 30 | 2035 | TCM | |
| 2010 Aug 5 | 1555 | TCM | |
| 2010 Aug 12 | 1055 | TCM | |
| 2010 Aug 20 | 0441 | TCM | |
| 2010 Sep 2 | 1821 | TCM | |
| 2010 Sep 7 | 0655 | TCM | |
| 2016 Feb 2 | TCM | ||
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