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A comment on SR-71 Blackbird Astro-Nav System (a.k.a. R2-D2) worked by tracking the stars. Parent comment
There aren’t many details but it’s some kind of electronic countermeasures/data collection system.
See the museum exhibit here:
http://www.sr71.us/sr_sensors_pg3.htm
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There aren’t many details but it’s some kind of electronic countermeasures/data collection system.
See the museum exhibit here:
http://www.sr71.us/sr_sensors_pg3.htm