Hubble gyroscopes
E867338
Hubble gyroscopes are precision instruments that help the Hubble Space Telescope maintain accurate pointing and stability for its astronomical observations.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
attitude control sensor
ⓘ
precision instrument ⓘ spacecraft gyroscope ⓘ |
| affectedBy |
internal component degradation
ⓘ
wear-out over time ⓘ |
| controlledBy | Hubble onboard computers NERFINISHED ⓘ |
| designedFor | long-duration operation in low Earth orbit ⓘ |
| developedFor | Hubble Space Telescope mission NERFINISHED ⓘ |
| enables | sub-arcsecond pointing accuracy ⓘ |
| hasFunction |
enable accurate pointing
ⓘ
maintain pointing stability ⓘ measure spacecraft rotation rates ⓘ provide attitude information ⓘ support fine guidance for observations ⓘ |
| hasQuantity |
one-gyro mode contingency capability
ⓘ
six gyroscopes at launch ⓘ three gyroscopes nominally used for science operations ⓘ two-gyro mode capability ⓘ |
| locatedIn | Hubble Space Telescope science instrument bay NERFINISHED ⓘ |
| maintenance | replaced during Space Shuttle servicing missions ⓘ |
| manufacturer | various aerospace contractors under NASA direction ⓘ |
| monitoredBy | Hubble ground control teams NERFINISHED ⓘ |
| operatedBy |
NASA
ⓘ
Space Telescope Science Institute NERFINISHED ⓘ |
| orbitEnvironment | low Earth orbit around Earth ⓘ |
| partOf | Hubble Space Telescope NERFINISHED ⓘ |
| partOfSystem |
Hubble attitude control system
NERFINISHED
ⓘ
Hubble fine guidance system NERFINISHED ⓘ Hubble pointing control system NERFINISHED ⓘ |
| poweredBy | Hubble electrical power system NERFINISHED ⓘ |
| replacedDuring |
STS-103 (Servicing Mission 3A) 1999
NERFINISHED
ⓘ
STS-109 (Servicing Mission 3B) 2002 NERFINISHED ⓘ STS-125 (Servicing Mission 4) 2009 NERFINISHED ⓘ STS-61 (First Servicing Mission) 1993 NERFINISHED ⓘ STS-82 (Servicing Mission 2) 1997 NERFINISHED ⓘ |
| requires |
continuous power
ⓘ
thermal control ⓘ |
| status |
redundant units used to extend mission life
ⓘ
several units have failed over mission lifetime ⓘ |
| use |
rate-sensing technology
ⓘ
ring laser gyroscope technology ⓘ |
| usedFor |
astronomical observations
ⓘ
attitude control ⓘ image stabilization ⓘ target acquisition ⓘ |
| worksWith |
Hubble attitude control electronics
ⓘ
fine guidance sensors ⓘ reaction wheels ⓘ star trackers ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.