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NASA-LLIS-1713: Lessons Learned - Simulate the Launch Site RF Configuration During I&T
Abstract: Abstract:
Science data losses during compatibility testing at the CloudSat launch site were traced to an RF cabling configuration that differed from the cables, couplers, and attenuators used during ...
Science data losses during compatibility testing at the CloudSat launch site were traced to an RF cabling configuration that differed from the cables, couplers, and attenuators used during ...
NASA-LLIS-1799: Lessons Learned – Erroneous Onboard Status Reporting Disabled IMAGE's Radio
Abstract: Abstract:
The loss of the IMAGE satellite was attributed to a Single Event Upset-induced "instant trip" of the Solid State Power Controller (SSPC) that supplies power to the single-string Transponder. ...
The loss of the IMAGE satellite was attributed to a Single Event Upset-induced "instant trip" of the Solid State Power Controller (SSPC) that supplies power to the single-string Transponder. ...
NASA-LLIS-2157: Lessons Learned – Network/Radio Frequency (RF) Compatibility Testing
Abstract: Abstract:
When conducting any type of compatibility testing, no matter how repetitive, it is important to always follow written procedures and best engineering practices even though those procedures ...
When conducting any type of compatibility testing, no matter how repetitive, it is important to always follow written procedures and best engineering practices even though those procedures ...
NASA-LLIS-1805: Lessons Learned – Mars Global Surveyor (MGS) Spacecraft Loss of Contact
Abstract: Abstract:
Contact was lost with the Mars Global Surveyor (MGS) spacecraft in November 2006 during its 4th extended mission. A routine memory load command sent to an incorrect address 5 months earlier ...
Contact was lost with the Mars Global Surveyor (MGS) spacecraft in November 2006 during its 4th extended mission. A routine memory load command sent to an incorrect address 5 months earlier ...
NASA-LLIS-1878: Lessons Learned - Contamination from Flaked Silver Plating Off Waveguides and Microwave Components
Abstract: Abstract:
Poorly plated RF waveguides pose a low to moderate risk of corona or arcing in NASA spacecraft that are presently in operation or under development. If use of plated waveguides cannot be ...
Poorly plated RF waveguides pose a low to moderate risk of corona or arcing in NASA spacecraft that are presently in operation or under development. If use of plated waveguides cannot be ...
NASA-LLIS-1796: Lessons Learned - MRO Waveguide Transfer Switch Anomaly
Abstract: Abstract:
A waveguide transfer switch failed five months after the insertion of Mars Reconnaissance Orbiter into Mars orbit. The likely cause was debris-induced RF breakdown that pyrolized a polyimide ...
A waveguide transfer switch failed five months after the insertion of Mars Reconnaissance Orbiter into Mars orbit. The likely cause was debris-induced RF breakdown that pyrolized a polyimide ...
NASA-LLIS-2376: Lessons Learned - Cosmic Background Explorer (COBE) On Orbit Engineering Performance
Abstract: Abstract:
The Cosmic Background Explorer (COBE) successfully launched on November 18, 1989, following a postponement due the the Challenger Shuttle Accident. The spacecraft enabled NASA scientist Dr. ...
The Cosmic Background Explorer (COBE) successfully launched on November 18, 1989, following a postponement due the the Challenger Shuttle Accident. The spacecraft enabled NASA scientist Dr. ...
NASA-LLIS-1765: Lessons Learned - Managing Rover-Orbiter Relay Link Prediction Variability
Abstract: Abstract:
The difference between the predicted versus achieved data volume returned by the Mars Exploration Rover relay link impacted the daily planning of rover driving and science data collection. ...
The difference between the predicted versus achieved data volume returned by the Mars Exploration Rover relay link impacted the daily planning of rover driving and science data collection. ...
NASA-LLIS-2156: Lessons Learned - Use of Research and Education Networks (RENS) for Science Data Transfe
Abstract: Abstract:
Missions that have a high data rate and/or high daily volume should consider the use of the RENS to transfer data from the control center to remote sites.
Missions that have a high data rate and/or high daily volume should consider the use of the RENS to transfer data from the control center to remote sites.
NASA-LLIS-1803: Lessons Learned – CSAM Augments X-Ray Inspection of Die Attach (MRO Ka-Band Anomaly)
Abstract: Abstract:
An in-flight failure of a hybrid amplifier used to derive the Ka-band downlink signal for Mars Reconnaissance Orbiter suggests that X-ray screening alone may not be adequate to determine the ...
An in-flight failure of a hybrid amplifier used to derive the Ka-band downlink signal for Mars Reconnaissance Orbiter suggests that X-ray screening alone may not be adequate to determine the ...