Used by the Mobilesat communications service to cover main land Australia. Based on the Hughes HS-601 satellite, the company's first 3-axis design, accommodating three bands simultaneously for high power services such as land mobile, large area DBS (Direct Broadcast Service) and HDTV (High Definition Television).
Solar arrays provide 601 W BOL/489 W after 3 yr., two 19 Ahr nickel cadmium batteries. Attitude control <1 arcmin, determination <0.3arcmin; 3 axis control by 4 reaction wheels, ensuring Sun incidenceangle on panels <30 deg. Bubble memory 134 Mb recorder downlinked onX-band at 264 kbit/sec. The tubular telescoping optical truss is constructed of carbon fiber which is folded for launch, extending by a sliding mechanism in orbit.
Four x-ray telescopes, consisting of four sets of coaxially aligned multilayer thin foil mirrors provided by GSFC. At the focus of two of the telescopes is a Gas Imaging Spectrophotometer (GIS) of two gas imaging scintillation propotional counters covering 0.7-10 keV. The second focal plane instrument is a Solid-state Imaging Spectrometer of two CCDs covering 0.5-8 keV. This is the first satellite to use CCDs
for X-ray astronomy.
|Country of Origin ||Australia|
|Size ||229x254x254 cm, deployable solar arrays span 18.3-26m|
|Orbit ||156 deg east|
|Design Life ||10-15 years|
| Name || Int'l Desig. || Date || Site || Vehicle || Orbit || Mass(kg) |
| Aussat 1 || 1985-076B || 8/27/85 || ESMC || STS 51I || GEO || 655 |
| Released by STS 51I 8/27/85; 158 deg W |
| Aussat 2 || 1985-109C || 11/27/85 || ESMC || STS 61B || GEO || 1259 |
| Released by STS 61B 11/28/85; 156 deg E |
| Aussat B1 (Optus B1) || 1992-054A || 8/13/92 || Xichang || CZ-2E || GEO || 1600 |
| 160 deg E |
| Aussat B2 (Optus B2) || 1992-090A || 12/21/92 || Xichang || CZ-2E || LEO || 1600 |
| Exploded 45 seconds after launch; debris placed into orbit |
| Aussat B3 (Optus B3) || 1994-055A || 8/27/94 || Xichang || CZ-2E || GEO || 3000 |
| Telephone; TV; mobile communications; air traffic control; 156 deg E |
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