Other data: 225 GHz tipper status monitor, radiosonde launches, surveillance images

Chajnantor Site Data

Caveats

These data are the results of NRAO's site characterization measurements since 1995 April together with some results of ESO's measurements since 1998 June. They are available for use by the ALMA project and other researchers, but please note:

Not all links are active. Some files are preliminary and may be replaced without notice.
Some files may contain "bad" data when, for example, instruments were malfunctioning. Although we have tried to edit out these data, use the files at your own risk.
Please do not refer to these data in any publication, etc., without contacting us first.

Simon Radford, ALMA/US Site Scientist

1995 April to 2004 August

	Quartiles			Cumul. Distrib.	Variations				Uptime
	25%	Median	75%	Cumul. Distrib.	Monthly	Seasonal	Diurnal	Combined	Overall	Monthly
225 GHz Transparency [τ₂₂₅]	0.037	0.061	0.121	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf	80 %	gif, ps.gz, pdf
Phase Stability [µm]†	117	238	489	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz	gif, ps.gz, pdf	73 %	gif, ps.gz, pdf
Temperature [°C]	-7.7	-2.7	+2.9	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf	79 %	gif, ps.gz, pdf
Wind Speed [m s^-1]	2.7	6.1	9.9	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf	gif, ps.gz, pdf
Wind Direction				gif, ps.gz, pdf
Wind Rose				gif, ps.gz, pdf		gif, ps.gz, pdf	gif, ps.gz, pdf

† R. m. s. path length fluctuations in 10 min intervals on 300 m baseline.

Yearly and monthly summaries

2004

	225 GHz Transparency			Phase Stability†					Temperature		Wind Speed		Wind Direction		Wind Rose	Weather Data	Images
Month	dist.	time	data	dist.	time	dist.	time	comp.	dist.	time	dist.	time	dist.	time	Wind Rose	Weather Data	Images
2004	gif, ps.gz			gif, ps.gz		gif, ps.gz			gif, ps.gz		gif, ps.gz		gif, ps.gz		gif, ps.gz
October	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz						text	n
September	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz						text	n
August	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz						text	n
July	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n
June	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n
May	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
April	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
March	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
February	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
January	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e

† Left columns are data from NRAO instrument, middle columns are data from ESO instrument (since 1998 June), and right column is comparison.

2003

	225 GHz Transparency			Phase Stability†					Temperature		Wind Speed		Wind Direction		Wind Rose	Weather Data	Images
Month	dist.	time	data	dist.	time	dist.	time	comp.	dist.	time	dist.	time	dist.	time	Wind Rose	Weather Data	Images
2003	gif, ps.gz			gif, ps.gz		gif, ps.gz			gif, ps.gz		gif, ps.gz		gif, ps.gz		gif, ps.gz
December	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
November	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
October	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
September	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
August	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
July	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
June	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
May				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz									n,e
April	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
March	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
February	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
January	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e

† Left columns are data from NRAO instrument, middle columns are data from ESO instrument (since 1998 June), and right column is comparison.

2002

	225 GHz Transparency			Phase Stability†					Temperature		Wind Speed		Wind Direction		Weather Data	Images
Month	dist.	time	data	dist.	time	dist.	time	comp.	dist.	time	dist.	time	dist.	time	Weather Data	Images
2002	gif, ps.gz			gif, ps.gz		gif, ps.gz			gif, ps.gz		gif, ps.gz		gif, ps.gz
December	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
November	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
October	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
September				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz								n,e
August				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz								n,e
July				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz								n,e
June	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
May	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
April	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
March	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
February	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
January				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz								n,e

† Left columns are data from NRAO instrument, middle columns are data from ESO instrument (since 1998 June), and right column is comparison.

2001

	225 GHz Transparency			Phase Stability†					Temperature		Wind Speed		Wind Direction		Weather Data	Images
Month	dist.	time	data	dist.	time	dist.	time	comp.	dist.	time	dist.	time	dist.	time	Weather Data	Images
2001	gif, ps.gz			gif, ps.gz		gif, ps.gz			gif, ps.gz		gif, ps.gz		gif, ps.gz
December	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
November	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
October	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
September	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
August	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz					text	n,e
July	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz					text	n,e
June	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz					text	n,e
May	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
April	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
March	gif, ps.gz	gif, ps.gz	text			gif, ps.gz	gif, ps.gz		gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
February	gif, ps.gz	gif, ps.gz	text						gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
January	gif, ps.gz	gif, ps.gz	text			gif, ps.gz	gif, ps.gz		gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e

† Left columns are data from NRAO instrument, middle columns are data from ESO instrument (since 1998 June), and right column is comparison.

2000

	225 GHz Transparency			Phase Stability†					Temperature		Wind Speed		Wind Direction		Weather Data	Images
Month	dist.	time	data	dist.	time	dist.	time	comp.	dist.	time	dist.	time	dist.	time	Weather Data	Images
2000	gif, ps.gz			gif, ps.gz		gif, ps.gz			gif, ps.gz		gif, ps.gz		gif, ps.gz
December	gif, ps.gz	gif, ps.gz	text			gif, ps.gz	gif, ps.gz		gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	n,e
November	gif, ps.gz	gif, ps.gz	text			gif, ps.gz	gif, ps.gz		gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
October	gif, ps.gz	gif, ps.gz	text			gif, ps.gz	gif, ps.gz		gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
September	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz		gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
August				gif, ps.gz	gif, ps.gz											x
July	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
June	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz		gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
May	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
April	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
March	gif, ps.gz	gif, ps.gz	text						gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
February
January	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x

† Left columns are data from NRAO instrument, middle columns are data from ESO instrument (since 1998 June), and right column is comparison.

1999

	225 GHz Transparency			Phase Stability†					Temperature		Wind Speed		Wind Direction		Weather Data	Images
Month	dist.	time	data	dist.	time	dist.	time	comp.	dist.	time	dist.	time	dist.	time	Weather Data	Images
1999	gif, ps.gz			gif, ps.gz		gif, ps.gz			gif, ps.gz		gif, ps.gz		gif, ps.gz
December	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
November	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
October	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
September	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
August	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
July	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	gif, ps.gz	text	x
June	gif, ps.gz	gif, ps.gz	text	gif, ps.gz	gif, ps.gz				gif,