Assertion: voyager's instrument | /r/CapableOf | remain stable
Facets:
value: photometrically
type: DEGREE
value: since 1977
type: TEMPORAL
Source sentences:
text: With the singular exception of a decrease in the Voyager 1 microchannel plates (MCP) gain, due to a high radiation-induced count rate during passage through the inner Jovian magnetosphere, both instruments have remained photometrically stable at a better than 3% level since 1977.