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| © 2007, AGC - INAOE. |
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| Panoramic view of Sierra Negra summit at 15,000 feet or 4,580 m above the sea level. On the left, the 50-m diameter antenna LMT towards the zenith, and on the right Pico de Orizaba mountain of 5000 m. (Photo: Jorge Reyes. © INAOE.) |
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