Temperature at AO by year

Intro:

The temperature on the platform is measured every two minutes by the laser ranging system. The temperature sensor was located beneath the laser shack (T4 corner of the platform) and was later moved to the NE corner by the faa radar antenna.
Daily and monthly plots are made of the temperature versus hour of day. A set of yearly summary plots is also available. When processing the data, all temperatures outside the range of 50 to 110F is ignored (occasionally the 430 xmter corrupts the data).

Daily,monthly plots of the temperature.

Platform temperature for the last 5 days (.ps) (.pdf)

**Platform temperature by month**
jan08 .ps .pdf	feb08 .ps .pdf	mar08 .ps .pdf	apr08 .ps .pdf	may08 .ps .pdf	jun08 .ps .pdf	jul08 .ps .pdf	aug08 .ps .pdf
jan07 .ps .pdf	feb07 .ps .pdf	mar07 .ps .pdf	apr07 .ps .pdf	may07 .ps .pdf	jun07 .ps .pdf	jul07 .ps .pdf	aug07 .ps .pdf	sep07 .ps .pdf	oct07 .ps .pdf	nov07 .ps .pdf	dec07 .ps .pdf
jan06 .ps .pdf	feb06 .ps .pdf	mar06 .ps .pdf	apr06 .ps .pdf	may06 .ps .pdf	jun06 .ps .pdf	jul06 .ps .pdf	aug06 .ps .pdf	sep06 .ps .pdf	oct06 .ps .pdf	nov06 .ps .pdf	dec06 .ps .pdf
jan05 .ps .pdf	feb05 .ps .pdf	mar05 .ps .pdf	apr05 .ps .pdf	may05 .ps .pdf	jun05 .ps .pdf	jul05 .ps .pdf	aug05 .ps .pdf	sep05 .ps .pdf	oct05 .ps .pdf	nov05 .ps .pdf	dec05 .ps .pdf
jan04 no data	feb04 .ps .pdf	mar04 .ps .pdf	apr04 .ps .pdf	may04 .ps .pdf	jun04 .ps .pdf	jul04 .ps .pdf	aug04 .ps .pdf	sep04 .ps .pdf	oct04 .ps .pdf	nov04 .ps .pdf	dec04 .ps .pdf
jan03 .ps .pdf	feb03 .ps .pdf	mar03 .ps .pdf	apr03 .ps .pdf	may03 .ps .pdf	jun03 .ps .pdf	jul03 .ps .pdf	aug03 .ps .pdf	sep03 .ps .pdf	oct03 .ps .pdf	nov03 .ps .pdf	dec03 .ps .pdf
jan02 .ps .pdf	feb02 .ps .pdf	mar02 .ps .pdf	apr02 .ps .pdf	may02 .ps .pdf	jun02 .ps .pdf	jul02 .ps .pdf	aug02 .ps .pdf	sep02 .ps .pdf	oct02 .ps .pdf	nov02 .ps .pdf	dec02 .ps .pdf
jan01 .ps .pdf	feb01 .ps .pdf	mar01 .ps .pdf	apr01 .ps .pdf	may01 .ps .pdf	jun01 .ps .pdf	jul01 .ps .pdf	aug01 .ps .pdf	sep01 .ps .pdf	oct01 .ps .pdf	nov01 .ps .pdf	dec01 .ps .pdf
jan00 .ps .pdf	feb00 .ps .pdf	mar00 .ps .pdf	apr00 .ps .pdf	may00 .ps .pdf	jun00 .ps .pdf	jul00 .ps .pdf	aug00 .ps .pdf	sep00 .ps .pdf	oct00 .ps .pdf	nov00 .ps .pdf	dec00 .ps .pdf

Yearly summary plots of the temperature.

At the end of each year, summary plots are made for the temperature. The plots include:

Daily minimum, maximum, and median temperatures versus date are plotted for all of the years available.
The daily median temperature is plotted versus hour of day for all of the years available.
The daily min,max temperature are plotted versus hour of day.
A histogram of the yearly temperatures is plotted for each year. The ordinate is in hours and fraction of total time. Each years histogram was scaled to the full number of hours in a year (some years had some missing data).

When processing the data, the data set is smoothed to 22 minutes before searching for the minimum or maximum. Yearly summary plots of the temperature (.ps) (.pdf):

Fig 1 Top. Green: max daily value, red median daily value, black min daily value. The jumps are missing data. The dashed blue lines are the start of each year.
Fig 1 Middle: The daily median value vs day of year. Color separates the different years
Fig 1 Bottom: The daily min, max (after smoothing) vs day of year. Color distinguishes the different years. The top traces are the max value while the bottom traces are the min values.
Fig 2 Top: Histogram or hours spent at each temp for the year. Different colors are different years. The histogram data was not smoothed before computing the histograms.
Fig 2 Bottom: Histogram of fraction of time spent at each temp by year.

Common yearly temperature properties:

The daily median temperature varies by 6 degrees over the year.
98% of the time the temperature is between 65 and 85 F.
The daily (Max - Min) temperature is relatively constant throughout the year. The mean value is 11.5 F.
The histogram of temperature repeats year to year.
The maximum temperatures for the 4th quarter of each year jumps down. This is probably the rain not letting the temp get as hot as usual

Notes on individual years:

apr-may07 the temperature sensor was in the painting containment. Inside it got over 100 degrees.
4th quarter 2004 was especially rainy. The max temps are lower than the other years.
The 2004 histogram has lost some readings around 72,73 F. I don't know whether this is instrumental or real.
The start of 2000 was a particularly cold spell where the median daily temp dropped to 64 F.

processing: x101/temp/tempproc.pro, doit.pro

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