This directory contains the IRTF Data Archive Weather infromation. The weather data is
collected for each 24 hour UTC period. The data includes:
data/ - various .txt file and graphs for weather and see data.
tau225.txt - timestamp and values for TAU 225GHz optical depth from the SMA weather site
The SMA home page is https://www.cfa.harvard.edu/sma/.
dimm.txt - timestamp and values for DIMM seeing values from the CFHT weather server.
The CFHT home page is http://cfht.hawaii.edu/
mass.txt - timestamp and values for MASS seeing values from the CFHT weather server.
The CFHT home page is http://cfht.hawaii.edu/
hum_ext.txt - External Humitidy from the IRTF sensors HE1 (0-100)
temp_ext.txt - External Air Temperature from the IRTF sensors TE2, in degC.
temp_dome.txt - Internal Dome temperature from an IRTF sensors TD6, in degC.
wind_sp.txt - External mean wind speed from an IRTF sensor WMSPD1, m/s.
wind_dir.txt - External wind directory from an IRTF sensor WDIR1 (N=0, E=90, S=180, W=270).
tcs_mode.txt - The Telescope Control System (TCS) Mode: 0=Stop, 1=MP, 2=MV, 3=Track, 4=Slew
mir_covers.txt - The state of the TCS mirror covers: 0=Close, 1=Open
asiva_{z|h}_{ne|se|sw|nw}.txt - External ASIVA data value. 8 file are produced
This data summaries the cloud coverage in a area the sky. Filename indicate the area
the {z|h} indicates a elevation zone: z=2airmass to zenith. h= Horizon to 2 airmass.
The {ne|se|sw|nw} indicated the azimuth zone: north-east, south-east, etc.
For example,the file asiva_h_ne.txt contains data for H (horizon-2Airmass) in the North-East.
A single value in the file provide a predictive value for the cloud coverage, where:
Value Condition Color
--------- ------------- -------
> 1.00 photometric Green
0.33-0.99 cirus/cloudy Orange
< 0.33 cloudy Red
The color are used on the weather graph, and asiva images.
weather_YYYMMDD.png - a graph of the above data is generate. The graph shows
a line plot for the various data for the UTC date. Most plot are self-explanatory, but..
ASIVA Data: The Asiva data show bar graph for each quardrant (NE, SE, SW, NW).
Since each quardrant has a Hor (Hor to 2 airmass), and Zen (2 airmass to Zenith)
value, they are stacked on each other, note the 2 dash lines.
TCS Trk: This bar graph display green when the TCS is tracking and the
Mirror Covers are open.
PROGRAM_ID data saved - Below the "TCS Trk", the time when data is
saved by each Program ID is plotted in orange, each line represent a saved FITS
file from Spex or iSHELL. The numbers on the left of the graph show the number of
files saved by each Program ID.
Below the graphs, a count of files saved by instrument code is displayed.
asiva/ - The CFHT ASIVA is their All Sky Infrared Visible Analyzer. Used for
cloud detection and coverage data.
The CFHT web link is: http://www.cfht.hawaii.edu/~asiva
The images are collect and the IRTF RA, DEC, Alt, Az, TCS MODE is written in yellow
on the top of each image.
The yellow "+" marks the approximate location of the IRTF telescope.
The .png are used to create a .mpg movie of the entire night.
ASIVS imsage were collect as of 8/5/2016.
hi_watervapor_band09/ - STAR images of Band 9 (IR: mid-level water vapor, wavelength: 6.9 um)
are saved here every hour. The project generates a JPEG
image every 5 minutes. At the end of UTC date,
hi_visible_band02.mp4 (MPEG) animation file is generated
from *.jpg files.
The Center for Satellite Applications and Research,
STAR, project:
https://www.star.nesdis.noaa.gov/
Image of GOES 17 satellite for Hawaii:
https://www.star.nesdis.noaa.gov/GOES/sector.php?sat=G17§or=hi
hi_infrared_band13/ - STAR images of Band 13 (IR: clean longwave window, wavelength: 10.3 um)
are saved here every hour. The project generates a JPEG
image every 5 minutes. At the end of UTC date,
hi_visible_band02.mp4 (MPEG) animation file is generated
from *.jpg files
The Center for Satellite Applications and Research, STAR, project:
https://www.star.nesdis.noaa.gov/
Images of GOES 17 satellite for Hawaii:
https://www.star.nesdis.noaa.gov/GOES/sector.php?sat=G17§or=hi