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January 10, 2011
Space Weather Prediction Center (SWPC)
Geomagnetic Data Lists
==========================================================================
GOES 15 to replace GOES 11 as Secondary SWPC
GOES Satellite Magnetometer Data
in late February
January 10, 2011 -- GOES 15 will replace GOES 11 as the Secondary SWPC
GOES Satellite for Protons, Electrons, and Magnetometer in late February.
See details at http://www.swpc.noaa.gov/Data/goes.html
GOES ascii data files use the file naming convention 'Gs' for Secondary
GOES data. This means only the header lines within the ascii file changes.
Send comments and questions to SWPC.CustomerSupport@noaa.gov
==========================================================================
This directory contains two geomagnetic data lists:
o A and K indices for ground-based magnetometer stations received
at SWPC. There are three lists; Last 2 days of A and K indices,
Last 7 days of A and K indices, and monthly lists.
The 2- and 7- lists contain the 8 stations that report in
near-real-time, they update every hour.
The monthly lists contain all stations received at SWPC,
they are updated once a day and begin on the 8th of the month.
Station are ordered alphabetically.
"-1" denotes missing values.
SWPC compiles the A and K-indices lists from preliminary
data provided by the contributing stations. Errors and invalid
indices are possible. Final values and older values are available
at the Solar Terrestrial Physics site at the National Geophysical
Data Center http://www.ngdc.noaa.gov/stp/
o 1-minute magnetometer component values from the primary and
secondary SWPC GOES satellites. See desription below.
All files update every minute.
Files with no date in the filename contain data for the last 2-hours.
Users retrieving data frequently are asked to use these files.
The daily files are named with the UT day of the data and the GOES
satellite, i.e G12 refers to GOES 12.
The file format follows the SWPC standard data list conventions where
header lines start with either # or :.
Date/times
Dates are shown as year month day (2006 02 06) and a Modified
Julian Day (MJD). The MJD for Jan 1, 2004 is 53005
Time is shown as HourMin (1900) and seconds of the day (68400)
GOES data are archived at the National Geophysical Data Center
http://www.ngdc.noaa.gov/stp
Filename convention
SWPC designates a Primary and a Secondary GOES Satellite for each
instrument. SEe http://www.swpc.noaa.gov/Data/goes.html
Filenames include a 'p' for Primary and 's' for Secondary
satellite. The satellite number is available in the Data List
file header.
2-hour lists: Gp_mag_1m.txt and Gs_mag_1m.txt
Full day lists: 20100414_Gp_mag_1m.txt and 20100414_Gs_mag_1m.txt
******************************************************************
** Please read the SWPC Disclaimer at http://www.swpc.noaa.gov/ **
******************************************************************
SWPC provides near-real-time and recent data, solar and geomagnetic
indices and solar event reports created from preliminary reports.
Preliminary data may contain errors or be revised after further
review. The historical products in this SWPC Warehouse are the
preliminary reports as originally published. SWPC does not encourage
the use of preliminary data for research purposes.
Links to on-line data at SWPC and archive sites with final data:
http://www.swpc.noaa.gov/Data/
******************************************************************
Please send comments and questions to SWPC.Webmaster@noaa.gov
Report problems to SWPC.CustomerSupport@noaa.gov
=======================================================================
=======================================================================
************************************************
Sample Geomagnetic A and K Indices List Product
************************************************
:Product: Geomagnetic Data 200712AK.txt
:Issued: 1636 UTC 04 Jan 2008
#
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
# Please send comments and suggestions to SWPC.Webmaster@noaa.gov
# Updated daily. Values are shown as reported, SEC does not verify accuracy.
# Missing Data: -1
#
# Geomagnetic A and K indices from the U.S. Geological Survey Stations
#
# Geomagnetic
# Dipole A ------------- 3 Hourly K Indices --------------
# Station Lat Long Index 00-03 03-06 06-09 09-12 12-15 15-18 18-21 21-24
#-------------------------------------------------------------------------------
2007 Dec 1
Beijing N29 W174 -1 -1 -1 -1 -1 -1 -1 -1 -1
Belsk N69 E 40 6 3 1 1 2 2 1 1 1
Boulder N49 W 42 2 2 0 1 1 1 1 0 1
Cape Chelyuskin N66 E177 -1 -1 -1 -1 -1 -1 -1 -1 -1
Chambon-la-foret N-- E--- 7 -1 -1 0 1 0 0 0 0
College N65 W102 3 1 0 2 3 0 0 0 0
Dixon Island N63 E162 -1 -1 -1 -1 -1 -1 -1 -1 -1
Fredericksburg N38 W 78 2 2 0 1 1 0 0 0 0
Gottingen(provisional Ap) -1 -1 -1 -1 -1 -1 -1 -1 -1
Kergulen Island S57 E130 -1 -1 -1 -1 -1 -1 -1 -1 -1
Krenkel N71 E156 104 4 4 3 3 2 1 1 2
Learmonth S22 E114 -1 -1 -1 -1 -1 -1 -1 -1 -1
St. Petersburg N56 E118 3 1 1 1 1 1 1 1 1
Magadan N51 W148 4 2 1 1 2 0 0 0 3
Moscow N51 E122 5 2 2 1 2 1 1 1 2
Murmansk N63 E127 4 3 1 1 0 2 0 0 1
Novosibirsk N45 E159 2 2 0 1 1 0 0 0 0
P. Tunguska N51 E165 2 0 1 1 1 1 0 1 1
Petropavlovsk N45 W140 -1 -1 -1 -1 -1 -1 -1 -1 -1
Planetary(estimated Ap) 2 2 0 1 1 0 0 0 0
Tiksi Bay N61 W168 -1 -1 -1 -1 -1 -1 -1 -1 -1
Wingst N54 E 95 3 3 1 1 1 0 0 0 1
2007 Dec 2
Beijing N29 W174 -1 -1 -1 -1 -1 -1 -1 -1 -1
Belsk N69 E 40 6 1 2 2 2 2 2 2 1
Boulder N49 W 42 1 0 1 1 0 0 1 1 1
Cape Chelyuskin N66 E177 -1 -1 -1 -1 -1 -1 -1 -1 -1
Chambon-la-foret N-- E--- -1 0 0 -1 -1 -1 -1 -1 -1
College N65 W102 0 0 0 0 0 0 0 0 0
Dixon Island N63 E162 -1 -1 -1 -1 -1 -1 -1 -1 -1
Fredericksburg N38 W 78 2 0 1 1 0 0 1 0 1
Gottingen(provisional Ap) -1 -1 -1 -1 -1 -1 -1 -1 -1
Kergulen Island S57 E130 -1 -1 -1 -1 -1 -1 -1 -1 -1
Krenkel N71 E156 92 3 3 3 2 1 2 3 3
Learmonth S22 E114 -1 -1 -1 -1 -1 -1 -1 -1 -1
St. Petersburg N56 E118 3 1 1 1 1 1 1 1 1
Magadan N51 W148 2 0 1 1 1 1 1 0 0
Moscow N51 E122 5 1 1 2 2 2 1 1 1
Murmansk N63 E127 3 1 0 1 1 1 2 1 1
Novosibirsk N45 E159 1 0 1 1 0 0 0 0 0
P. Tunguska N51 E165 5 1 2 1 1 1 2 2 1
Petropavlovsk N45 W140 -1 -1 -1 -1 -1 -1 -1 -1 -1
Planetary(estimated Ap) 2 0 1 0 0 0 0 0 1
Tiksi Bay N61 W168 -1 -1 -1 -1 -1 -1 -1 -1 -1
Wingst N54 E 95 -1 -1 -1 -1 -1 -1 -1 -1 -1
************************************************
Sample GOES Magnetometer List --
See GOES magnetometer data description below
************************************************
:Data_list: Gp_mag_1m.txt
:Created: 2010 Apr 14 1917 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
# Please send comments and suggestions to SWPC.Webmaster@noaa.gov
#
# Label: Hp component = perpendicular to the satellite orbital plane or
# parallel to the Earth's spin axis
# Label: He component = perpendicular to Hp and directed earthwards
# Label: Hn component = perpendicular to both Hp and He, directed eastwards
# Label: Total Field =
# Units: nanotesla (nT)
# Source: GOES-13
# Location: W081
# Missing data: -1.00e+05
#
# 1-minute GOES-13 Geomagnetic Components and Total Field
#
# Modified Seconds
# UTC Date Time Julian of the
# YR MO DA HHMM Day Day Hp He Hn Total Field
#-------------------------------------------------------------------------------
2010 04 14 1717 55300 62220 1.44e+02 3.29e+01 2.08e+00 1.48e+02
2010 04 14 1718 55300 62280 1.44e+02 3.35e+01 1.99e+00 1.48e+02
2010 04 14 1719 55300 62340 1.44e+02 3.36e+01 1.99e+00 1.48e+02
2010 04 14 1720 55300 62400 1.45e+02 3.38e+01 1.96e+00 1.49e+02
2010 04 14 1721 55300 62460 1.45e+02 3.33e+01 1.89e+00 1.48e+02
2010 04 14 1722 55300 62520 1.44e+02 3.28e+01 1.72e+00 1.48e+02
2010 04 14 1723 55300 62580 1.43e+02 3.24e+01 1.41e+00 1.47e+02
2010 04 14 1724 55300 62640 1.42e+02 3.24e+01 9.99e-01 1.46e+02
2010 04 14 1725 55300 62700 1.42e+02 3.29e+01 1.02e+00 1.46e+02
2010 04 14 1726 55300 62760 1.42e+02 3.30e+01 1.33e+00 1.46e+02
2010 04 14 1727 55300 62820 1.42e+02 3.27e+01 1.61e+00 1.46e+02
...
================================================================================
================================================================================
DESCRIPTION OF GOES MAGNETOMETER DATA
September 1996
SWPC designates two GOES satellites as operational, one at about 135 degrees
geographic west longitude and one at about 75 degrees geographic west
longitude. The satellite inclination is typically within a few tenths of a
degree of of the geographic equator. However, the satellites can be moved,
especially during the six months to one year following launch, and the
inclination can increase after years of satellite operation. The following
information is provided as an aid for interpreting and using magnetometer
data from GOES satellites.
1. Coordinate system:
The three components are: Hp, perpendicular to the satellite orbital plane
or parallel to the Earth's spin axis in the case of a zero degree
inclination orbit; He, perpendicular to Hp and directed earthwards; and Hn,
perpendicular to both Hp and He and directed eastwards. (This is the same
coordinate system used for all the GOES magnetic field measurements since
GOES-5; prior to GOES-5, Hn was directed westwards.)
2. Effect of three-axis stabilized, rather than spinning spacecraft:
Calibration data are used from ground and on-orbit testing, including a
one-time 3-axis spacecraft maneuver to determine offsets resulting from the
spacecraft field and magnetometer electronics. However, it is important to
remember that absolute vector magnetic field measurements are difficult to
determine on non-spinning spacecraft such as GOES 8 and 9. We will continue
to evaluate the data, including comparisons with model fields, and provide
improved knowledge of magnetic field absolute accuracy as it becomes known.
3. Torquer current effects:
A calibration between torquer currents and magnetic field signatures was
made both on the ground and in space for correcting the magnetic field
measurement; however, on GOES-8, noise in the torquer current telemetry
introduced artificial noise in the "corrected" magnetic field at the few
nanoTesla level. A correction has been instituted on GOES-8, and will be
included on following spacecraft, to allow use of torquer command data for
torquer current correction. The problem has been further dealt with on
GOES-9, and future spacecraft, by filtering the torquer current telemetry
before it is transmitted. These effects should be insignificant in the vast
majority of the 1-minute data.
4.GOES 9 eclipse intervals:
GOES-9 is undergoing few degree rotations during the eclipse seasons for
spacecraft thermal control to extend the life of motors used for the imager
and sounder. The first tests were on August 14, 1996, and then rotations
were performed routinely from August 20, 1996 to September 1, 1996. These
rotations will be performed again from October 13, 1996 to October 26, 1996.
The schedule may be cancelled during severe weather monitoring intervals.
The spacecraft, including magnetometer sensors, is rotated 3.5 degrees to
the east about four hours before local midnight. At local midnight, the
spacecraft is rotated to face four degrees west from the usual orientation.
Approximately four hours later, the spacecraft orientation is returned to
normal. For example, on August 14, the first maneuver was about 0430 UT,
the second at 0840 UT and the final rotaion at 1302 UT.
At present, there is no correction applied to the magnetometer data, but the
correction should be present by the spring eclipse season.
5. Calibrations:
Calibrations are performed once per week and will result in a few minutes of
deleted 1 minute average data.
6. Reference:
Singer, H.J., L. Matheson, R. Grubb, A. Newman and S.D. Bouwer, Monitoring
Space Weather with the GOES Magnetometers, SPIE Conference Proceedings,
Volume 2812, 4-9 August 1996, in press.
Contacts:
Dr. Howard.Singer@noaa.gov Lead Scientist for GOES SEM Instruments
Dr. Terry.Onsager@noaa.gov Energetic Particles
Dr. Howard.Singer@noaa.gov Magnetometer
=========================================================================
=========================================================================
=========================================================================
OLD NOTICES
=========================================================================
May 15, 2003
Space Environment Center GOES MAGNETOMETER Data Lists
==========================================================================
On April 14, 2010
GOES 13 will be designated Primary Satellite for
Proton, Electron and Magnetometer Data
****** Data List Naming Convention Changing ******
April 5, 2010: On Wednesday, 14 April, the GOES 12 satellite will
be decommissioned. At that time, GOES 13 will become the Primary
SWPC GOES Satellite for Magnetometer data. GOES 11 will become the
Secondary Satellite.
**************************************************
******* Data List Naming Convention Change *******
**************************************************
The SWPC data list naming convention will be changed to better support
future GOES satellite designation changes. SWPC designates a Primary and
a Secondary GOES Satellite for each instrument.
http://www.swpc.noaa.gov/Data/goes.html
The old data list naming convention included the satellite number, e.g.
G10mag_1m.txt. This required customer changes whenever the satellite
designation changed. The new Data List Naming Convention replaces the
satellite number with a 'p' for Primary and 's' for Secondary. The satellite
number is available in the Data List file header.
The new convention will begin April 14 when GOES 13 replaces GOES 12 as
the SWPC Primary GOES Magnetometer Satellite.
Naming Convention:
2-hour lists: Gp_mag_1m.txt and Gs_mag_1m.txt
Full day lists: 20100414_Gp_mag_1m.txt and 20100414_Gs_mag_1m.txt
==========================================================================
======================================================================
May 15, 2003 -- The GOES 10 energetic proton detectors are showing
intermittent, high noise levels in the higher energy proton channels
(greater than about 80 MeV). This problem was first noticed in data
taken April 26, 2003. To ensure continued operational monitoring of
important energetic particle data, it is necessary to reassign
primary/secondary designations for the GOES Space Environment
Monitor (SEM) detectors. As of 1500 UT on May 15, GOES-8 became the
primary satellite for protons. GOES 12 is the primary satellite
for magnetometer, X-ray, and electron measurements. GOES 10 is
the secondary satellite for all SEM sensors - magnetometer, X-ray
sensor, and energetic particle sensor. This short-term solution
(approximately 2 - 3 months) will be in place until we define and
implement a permanent fix.
See details at http://www.swpc.noaa.gov/GOES.html
======================================================================
April 8, SWPC stopped using GOES 8 data.
GOES 10 is now SWPC's primary GOES satellite, with GOES 12 the backup
for magnetometer, XRS x-ray measurements, and energetic particle data.
However, no integral particle and electron flux values are available
on GOES 12.
===========================================================================
===========================================================================