TIMED SEE

SEE Version 11 Data Products Are Now Available

Version 11 Release Notes


SEE Space Weather Solar Irradiance Data


    The figure above represents each of the solar indices available in the SEE Space Weather product with independent relative color scale. Solar rotations are noticeable as rainbow colors with black/violet as minimum and red/white as maximum. The scale is logarithmic to enhance the soft X-ray band.

    Space Weather FTP Directory- browse the ftp directory

top

Detailed Space Weather Description

README_SEE_SPWX_011.TXT - information for using SEE Space Weather data

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.

Proxies
RegionWavelength
Corona
  • 0.1 - 7 nm band
  • 33.5 nm line
  • 36.8 nm line
Transition
  • 27 - 34 nm band
  • 30.4 nm line
  • 121.6 nm line
Chromospheric
  • 133.5 nm line
  • 145 - 165 nm band
top

SEE Space Weather Software

  • plot_see_spwx.zip - Zip file containing IDL source code to read and plot Space Weather data. All the following files are locating within this one zip file.

  • read_dat.pro - IDL procedure for reading one ASCII file as a structure
  • plot_see_spwx.pro - IDL procedure for plotting a time series of space weather data files.
  • Space Weather FTP Directory- browse the ftp directory for support files. All IDL procedures are contained in the zip file shown above.

top

SEE Space Weather Solar Irradiance Data Format

Each data file contains columns of data that are converted into a structure by read_dat.pro
SPWX_DATA       STRUCT    = ->  Array[61437]

Each SPWX_DATA structure has the following form:

** Structure <2e93c8>, 23 tags, length=88, data length=84, refs=2:

YEAR INT 2002
MO INT 2
DD INT 8
HH INT 0
MM INT 56
SS INT 2
JD DOUBLE 2452313.5
E1_7 FLOAT 0.894300
U1_7 FLOAT 0.100000
E27_34 FLOAT 1.64600
U27_34 FLOAT 17.4000
E304 FLOAT 0.542000
U304 FLOAT 37.8000
E335 FLOAT 0.231400
U335 FLOAT 15.8000
E368 FLOAT 0.0712900
U368 FLOAT 9.40000
E121 FLOAT 10.9100
U121 FLOAT 10.3000
E1335 FLOAT 0.259400
U1335 FLOAT 11.4000
E145_165 FLOAT 3.19400
U145_165 FLOAT 2.40000
File attributes for this year

; Data_list: latest_TIMED_SEE_obs.dat

; Last_Update: 2014 Apr 18 1422 UTC
; Prepared by the CU/LASP, TIMED-SEE POC
; Please send comments and suggestions to tom.woods @ lasp.colorado.edu
;
; Label: E1_7 = Solar irradiance from 0.1-7 nm measured by XPS diode 1
; Label: U1_7 = Stddev of 0.1-7 nm irradiance reported in L2A
; Label: E27_34 = Solar irradiance from 27-34 nm measured by EGS
; Label: U27_34 = Stddev of 27-34 nm irradiance
; Label: E304 = Solar irradiance from 30.4 nm measured by EGS (He II)
; Label: U304 = Stddev of 30.4 nm irradiance
; Label: E335 = Solar irradiance from 33.5 nm measured by EGS (Fe XVI)
; Label: U335 = Stddev of 33.5 nm irradiance
; Label: E368 = Solar irradiance from 36.8 nm measured by EGS (Mg IX)
; Label: U368 = Stddev of 36.8 nm irradiance
; Label: E121 = Solar irradiance from 121.5 nm measured by EGS (H I)
; Label: U121 = Stddev of 121.5 nm irradiance
; Label: E1335 = Solar irradiance from 133.5 nm measured by EGS (C II)
; Label: U1335 = Stddev of 133.5 nm irradiance
; Label: E145_165 = Solar irradiance from 145-165 nm measured by EGS
; Label: U145_165 = Stddev of 145-165 nm irradiance
; Units: Irradiance = Watts per meter squared per nanometer
; Units: Uncertainty = Percent
; Source: The NASA TIMED-SEE instrument
; Version: 011
; Location: LEO, alt: 625 km, inclination: 74.1 deg
; Missing data: -1.000E+00
; Info: http://lasp.colorado.edu/see
; Note: All times are at the center of the observation
; This file spans 30 days. The most recent two days may not be complete.
; 7% is added to the uncertainties for those days.
;
; 3-minute Observation Averaged TIMED-SEE Solar Irradiance
; Created From Level 2A Irradiances
;
; UTC Date Time Julian 1_7 26_34 304 335 368 121 1335 145_165
; YR MO DA HHMMSS Date E U E U E U E U E U E U E U E U
; -------------------------------------------------------------
top

.
 
      NASA SEE TIMED LASP

Revised: November 2007
+ Questions or comments?