1 / 20

Site Testing at Cerro La Negra

Site Testing at Cerro La Negra. Esperanza Carrasco Alberto Carramiñana José Luis Avilés Omar Yam INAOE. October, 2001. Cerro La Negra. Large Millimetre Telescope (LMT) site Latitute: 18°59´ Longitude: 97°18´W 4600m above sea level

flynn-bridges
Download Presentation

Site Testing at Cerro La Negra

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Site Testing at Cerro La Negra Esperanza Carrasco Alberto Carramiñana José Luis Avilés Omar Yam INAOE October, 2001

  2. Cerro La Negra • Large Millimetre Telescope (LMT) site • Latitute: 18°59´ • Longitude: 97°18´W • 4600m above sea level • Low water vapour content: Opacity at 225 GHz down to 0.02

  3. Cerro La Negra: access

  4. Topography

  5. Water vapour • Radiometers at 225 GHz (for LMT project) • median opacities below 0.2 (global) and 1st quartile below 0.1  water vapour column below 1mm • Low water vapour content fine for potential IR telescopes • Summary at http://www.lmtgtm.org/

  6. Optical Seeing • Instrument DIMM (Vernin & Muñoz-Tuñón, 1995) • Tower: 5m height

  7. Seeing Campaigns • February - April 2000 • October - December 2000 • May - September 2001

  8. Feb - Abr 2000 Oct - Dic 2000 0.642” 0.536” Globall May-Sep2001 0.680” 0.870”

  9. Seeing-daily

  10. Without a trend for short periods

  11. Seeing Statistics at Cerro La Negra

  12. Meteorological data • From November 2000 • Temperature • Wind • Humidity

  13. Wind speed histogram 4.92 m/s

  14. Wind • 1st quartile: 3.58 m/s • Median: 4.92 m/s • 3rd quartile: 6.69 m/s • Chajnantor (~4 m/s; Giovanelli 2001)

  15. Conclusions • Seeing is very good: 0.67” • Median value between 0.54” (Winter) & 0.87” (Summer) • Further Monitoring

More Related