File:A51 Sigma.svg
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| Description |
English: Many patches from Groom Lake projects show the Greek letter Sigma (in inverted form), which often identifies as a technical term for how well an object reflects radar waves, a crucial parameter in developing stealth aircraft. |
| Date | (UTC) |
| Source | Unknown source |
| Author | Unknown author |
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This work has been released into the public domain by its author, Flakeyswilson at English Wikipedia. This applies worldwide. In some countries this may not be legally possible; if so: Flakeyswilson grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
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The original description page was here. All following user names refer to en.wikipedia.
| Date/Time | Dimensions | User | Comment |
|---|---|---|---|
| 2010-06-10 16:11 | 244×241× (1722 bytes) | Flakeyswilson | {{Information |Description = |Source = I (~~~) created this work entirely by myself. |Date = ~~~~~ |Author = ~~~ |other_versions = }} |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:21, 3 July 2015 | | 244 × 241 (2 KB) | Jo-Jo Eumerus (talk | contribs) | Transferred from en.wikipedia |
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