10 DEAI. 2002
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Editor's note: This page was last updated on 18 May 2009
Mission | |
|---|---|
Launch date | 22 October 2001 |
Launch site | Sriharikota, India |
Launcher | Antrix/ISRO PSLV-C3 |
Orbit | LEO Sun-synchronous |
Orbital parameters | 681x561 km |
Orbital plane inclination | 97.9 degrees |
Orbital period | 96.97 minutes |
Mission duration | One year (planned) |
Number of instruments | Eight |
Number of technological payloads | Six |
Mission operations and ground station | ESA/REDU dedicated 2.4 m dish, average of 4 contacts of 10 m/day, automated evening & weekend passes |
Modh meán
Spacecraft | |
|---|---|
Spacecraft mass | 94 kg |
Instrument mass | 25 kg |
Technological payload mass | 30 kg |
Shape | 60x60x80 cm box shaped aluminium honeycomb structure |
Proba platform features
Computing system (highest performance computing system yet flown on an ESA spacecraft)
ERC-32 (SPARC V7) processor, >80 krad, 10 MIPS, 2 MFLOPS
TCS 21020 digital signal processor, >100 krad, 15 MIPS, 45 MFLOPS
12 other processors in subsystems/payload
off-the-shelf operating system (Vx Works)
full automatic code generation of all attitude control and navigation software (~50000 lines of code)
3-axis stabilisation (Earth pointing or inertial) by four miniaturised reaction wheels
absolute pointing accuracy: 150 arcsec
relative pointing stability: 10 arcsec over 10 s
2-headed star tracker providing arcsec level pointing knowledge
Modh meán
GPS sensor providing 20 m position and fly-by knowledge
Spacecraft agility (along- and across-track), enabling multiple payload imaging (typically 5) of the same target in the same pass
Slew rate: up to 1 deg/s
Autonomous navigation via GPS and orbit propagation (no propulsion)
GaAs solar cells on five structure faces
120 W peak
17 W in safe mode
28 Vdc regulated power bus
Modh meán
9 Ah Li-Ion battery
Passive thermal-control system
1 Mbit/s S-band downlink
4 kbit/s uplink
1.2 Gbit data storage
Modh meán
Observing the Earth
Is é an spás amháin a thugann an dearcadh chun ár ndomhan athraitheach a thuiscint, a mhonatóireacht agus gníomhú ina leith.
Space Engineering
Ag cur ar chumas ESA go n-éireoidh léi trína chinntiú go bhfuil an teicneolaíocht cheart ar fáil ag an am ceart agus ag an aibíocht cheart.
Indian Space Research Organisation
Comhroinn an leathanach seo
Fan suas chun dáta
Liostáil lenár nuachtlitir chun an nuacht is déanaí, nuashonruithe misin, agus léargas eisiach a fháil go díreach i do bhosca isteach. Bí ar an gcéad duine a bheidh ar an eolas faoinár dtionscadail agus ár ndul chun cinn atá le teacht.