README file for:
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TIMED SEE Space Weather Data Products
This README file is located at:
ftp://laspftp.colorado.edu/pub/SEE_Data/level2a_egs/README_SEE_SPWX_011.TXT
Also read the SEE_v11_releasenotes.txt file for known issues
with the SEE data at:
https://lasp.colorado.edu/data/timed_see/SEE_v11_releasenotes.txt
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TIMED Data Rules of the Road & Data Access Policy
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Users of TIMED data are asked to respect the following
guidelines
Mission scientific and model results are open to all.
Users should contact the PI or designated team member of an
instrument or modeling group early in an analysis project
to discuss the appropriate use of instrument data or model
results. This applies to TIMED mission team members, guest
investigators, and other members of the scientific
community or general public.
Users that wish to publish the results derived from TIMED
data should normally offer co-authorship to the PI or
his/her designated team member. Co-authorship may be
declined. Appropriate acknowledgement to institutions,
personnel, and funding agencies should be given.
Users should heed the caveats of investigators as to the
interpretation and limitations of data or model results.
Investigators supplying data or models may insist that such
caveats be published, even if co-authorship is declined.
Data and model version numbers should also be specified
Pre-prints of publications and conference abstracts should
be widely distributed to interested parties within the
mission and related projects.
See also: http://www.timed.jhuapl.edu/scripts/mdc_rules.pl
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TIMED SEE Space Weather Data Product
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Observation Averaged Space Weather (ASCII)
OVERVIEW: The SEE Space Weather data products contain 8 solar indices useful
for space weather research and operations. These solar indices are irradiance
bands that are averaged over each 3-minute solar observation and have
corrections applied for instrument degradation, 1-AU, and atmospheric
absorption. These are ASCII (text) files that provide a convenient method to
access select SEE data and are organized into a file for each year. These
solar indices are appropriate proxies for modeling the chromospheric,
transition region, and coronal emissions. The best coronal proxies are the
0.1-7 nm band, Fe XVI 33.5 nm line, and Mg IX 36.8 nm line. The best
transition region proxies are the 27-34 nm band (like the SOHO SEM first
order band), He II 30.4 nm line, and H I 121.6 nm line. The best chromospheric
proxies are the C II 133.5 nm line and the 145-165 nm band.
DIFFERENCES WITH THE LEVEL 2A PRODUCTS: The Level 2A data products
contains the entire EUV and FUV spectral irradiances for each observation
average (~3 min) while the Space Weather product contains a subset of the
spectral measurements. The Space Weather product contains integrated bands
that are readily useable and are currently only a convenience. In an upcoming
software version release, we plan to make this product available as soon after
collection as possible.
EGS OVERVIEW: The EUV Grating Spectrograph (EGS) component
of SEE is a 1/4 meter Rowland circle spectrograph with a
mechanically-ruled concave grating and a microchannel plate
detector with a two-dimensional 1024 x 64 coded anode (CODACON)
readout. The EGS covers the wavelength range from approximately
26 to 190 nm. Details of the instrument can be found at
https://lasp.colorado.edu/see/overview/instrument-overview
For normal operations, SEE observes the Sun for about 3 minutes
every orbit (97 minutes), which usually gives 14-15 measurements
per day. The SEE Level 2A data are time averaged over each 3 minute
observation, after applying corrections for atmospheric absorption,
degradation, and to 1-AU. A suborbital (sounding
rocket) payload is flown once a year for TIMED SEE absolute
calibrations. The first SEE suborbital calibration flight was
on Feb. 8, 2002, the second was on Aug. 12, 2003, the third was
on Oct. 15, 2004, the fourth was on Oct. 28, 2006, and the final
SEE calibration flight was on Apr. 14, 2008.
DATA LOCATION: SEE FTP site at
https://lasp.colorado.edu/data/timed_see/spwx/
Copy the *.pro files (IDL procedures) as ASCII files.
(alternatively copy the .zip file as binary)
Copy the *.txt files (help files) as ASCII files.
FILE FORMAT: ASCII file for each year
FILE CONTENT: Solar indices useful for space weather studies.
CURRENT VERSION: 11 (released 10/01/12)
WARNINGS: This version is not yet fully validated.
See SEE_v11_releasenotes.txt for more information.
READING A FILE:
You can use the IDL procedure read_dat.pro to read the SEE Space Weather
data products, or plot_see_spwx.pro. Example usage follows.
IDL> d=read_dat('2002_TIMED_SEE_obs.dat')
where
d = data read from the specified file
IDL> help, d, /structure ; to list data structure
or
IDL> plot_see_spwx, data=d, att=att
d = data read from the specified file
att = string array listing the attributes (definitions)
IDL> n = n_elements(att) ; to print attributes
IDL> for k=0,n-1 do print, att[k]
IDL procedures can be found at
https://lasp.colorado.edu/data/timed_see/spwx/
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Version History for SEE Space Weather Data Product
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8.00 10/05 First release of this data product.
See SEE_v8_releasenotes.txt for information.
9.00 4/07 See SEE_v9_releasenotes.txt for information.
10.00 7/07 See SEE_v10_releasenotes.txt for information.
11.00 10/12 See SEE_v11_releasenotes.txt for information.
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The main SEE web page is: http://lasp.colorado.edu/see
For SEE data access problems or suggestions, you can send
e-mail to don.woodraska@lasp.colorado.edu or
tom.woods@lasp.colorado.edu
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END OF README FILE