10 OTT. 2002
Data di pubblicazione
468
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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 |
Modal media
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
Modal media
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
Modal media
9 Ah Li-Ion battery
Passive thermal-control system
1 Mbit/s S-band downlink
4 kbit/s uplink
1.2 Gbit data storage
Modal media
Observing the Earth
Solo lo spazio offre la prospettiva necessaria per comprendere, monitorare e agire in un mondo in continua evoluzione.
Space Engineering
Contribuire al successo dell’ESA garantendo che la tecnologia adeguata sia disponibile al momento giusto e al giusto stadio di maturità.
Indian Space Research Organisation
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