January 3, 2008
Space Weather Prediction Center
USAF Magnetometer Analysis Report
The U.S. Air Force (USAF) issues Hourly and 24-Hour (daily) reports
containing geomagnetic A and K indices and maxiumum gamma deflections.
The Space Weather Prediction Center makes these reports available on
the internet via FTP and the World Wide Web. See sample and description
below.
SWPC updates the files as they are received, usually between 20 and 30
minutes past the hour. The most recent messages are available here
and in the "Latest Solar-Geophysical Data" directory (/pub/latest/).
There are hourly and daily messages in the files MAhr.txt and
MAda.txt are taken from USAF messages with the headers AXXX51 KHMN
and AXXX52 KHMN
In this directory:
o the most recent messages (MAhr.txt, MAda.txt)
o the last 48 hourly messages (oldMAhr.txt)
o the last 7 daily messages (oldMAda.txt)
Available:
via SWPC Anonymous FTP server ftp.swpc.noaa.gov
/pub/latest/MAda.txt --- most recent report
/pub/latest/MAhr.txt --- most recent report
/pub/forecasts/MA --- last Hourly, last Daily,
last 48 Hourly, last 7 Daily
via SWPC Web site:
http://swpc.noaa.gov/ftpdir/latest/MAda.txt
http://swpc.noaa.gov/ftpdir/latest/MAhr.txt
http://swpc.noaa.gov/ftpmenu/forecasts/MA.html
***************************************************************
** Please read the SWPC Disclaimer at http://www.swpc.noaa.gov/
** before using the forecasts and data in these reports.
***************************************************************
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 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
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Product Description
From Air Force Catalog 15-152, Volume 5, 7 November 1994
Hourly Magnetometer Analysis Report -- MAhr.txt
2.15.1. Description. This bulletin describes the geomagnetic
field's current state and summarizes geomagnetic indices observed
during the previous seven hours. It contains local 60-minute
variations in the geomagnetic field (maximum gamma deflections and
corresponding 1-hour K-indices) reported by magnetic observatories
in Canada, the United States, and United Kingdom. These bulletins
comprise indices as calculated from magnetic observations
reported by the Natural Resources Canada magnetic observatories
located at Meanook, Ottawa, and Saint Johns; the US Geological
Survey magnetometer stations located at Sitka, Newport,
Fredericksburg, Boulder, and Fresno; also the British Geological
Survey station in Hartland, England. [NOTE: The magnetometer
data used to generate the product are one-minute averaged data.]
The bulletin also lists several indices derived from these local
variations: the 3-hour ap (and corresponding 3-hour Kp) index, as
well as the 12 and 24-hour running mean of the Ap index.
Compatibility with world-standard Goettingen, Germany, indices
is achieved by computing values at the synoptic hours (03Z, 06Z,
09Z, ..., and 24Z). The indices computed between the synoptic
hours are estimates (or projections) of what the indices will be
at the next synoptic hour.
2.15.2. Transmission Times. No later than 0030Z, plus every 60
minutes.
2.15.3. Format (see Figure 2.15.). Computer generated plain
language bulletin. An asterisk indicates missing data.
**************************************************************
SAMPLE
**************************************************************
:Product: Hourly Magnetometer Analysis Reports MAhr.txt
:Issued: 2008 Jan 03 2124 UT
# Prepared by the U.S. Air Force.
# Retransmitted by the Dept. of Commerce, NOAA, Space Weather Prediction Center
# Please send comments and suggestions to SWPC.Webmaster@noaa.gov
#
#
# USAF Hourly Magnetometer Analysis Report
#-----------------------------------------------------------------
MAGNETOMETER ANALYSIS FOR 03/2100
HOURLY MAX GAMMA DEFLECTIONS/K INDICES
12-15 13-16 14-17 15-18 16-19 17-20 18-21
MEANOOK 10/0 10/0 12/0 9/0 9/0 7/0 8/0
SITKA 4/0 4/0 4/0 5/0 5/0 6/0 7/0
OTTAWA 12/0 12/0 17/1 14/0 13/1 9/0 12/0
SAINT JOHNS 11/0 10/0 8/0 7/0 9/0 8/0 6/0
NEWPORT 4/0 4/0 6/0 7/0 8/0 7/0 9/0
FREDERICKSBURG 11/0 10/0 14/0 20/2 17/1 16/1 18/1
BOULDER 5/0 7/0 8/0 10/0 8/0 9/0 12/0
HARTLAND 9/0 7/0 6/0 4/0 3/0 3/0 4/0
FRESNO 5/0 7/0 6/0 10/0 12/0 11/0 11/0
12-15 13-16 14-17 15-18 16-19 17-20 18-21
3-HOUR AP 0 0 0 0 0 0 0
3-HOUR KP 0Z 0Z 0Z 0Z 0Z 0Z 0Z
12-HOUR AP ** ** ** ** ** ** **
24-HOUR AP 1 1 1 1 1 0 1
#SYNOPTIC VALUE ESTIMATED FROM AVAILABLE DATA
14-15 15-16 16-17 17-18 18-19 19-20 20-21
1-HOUR KP ** ** ** ** ** ** **
12-15 13-16 14-17 15-18 16-19 17-20 18-21
RUN 3-HOUR AP 0 0 0 0 0 0 0
RUN 3-HOUR KP 0Z 0Z 0Z 0Z 0Z 0Z 0Z
99999
=========================================================================
=========================================================================
=========================================================================
Daily Magnetometer Analysis Report -- MAda.txt
2.16.1. Description. This bulletin contains a summary of
geomagnetic field conditions observed during the previous 24
hours. The bulletin contains local 3-hour variations in the
geomagnetic field (gamma deflections and 3-hour K-indices) at
synoptic hours (03Z, 06Z, 09Z, ..., and 24Z). Although this
bulletin basically summarizes data previously reported in the
day's HMUS1 KSFC bulletins, the values listed are final values in
the sense that missing, late, or corrected data have been
included.
2.16.2. Transmission Times. Once daily near 0115Z via AUTODIN
and the AWN.
2.16.3. Format (see Figure 2.16.). Computer generated plain
language bulletin. An asterisk indicates missing data.
*************************************************************
SAMPLE
*************************************************************
:Product: Daily Magnetometer Analysis Reports MAda.txt
:Issued: 2008 Jan 03 0024 UT
# Prepared by the U.S. Air Force.
# Retransmitted by the Dept. of Commerce, NOAA, Space Weather Prediction Center
# Please send comments and suggestions to SWPC.Webmaster@noaa.gov
#
#
# USAF Daily Magnetometer Analysis Report
#-----------------------------------------------------------------
MAGNETOMETER ANALYSIS FOR 02 JAN 08
24 HOUR SUMMARY OF 3-HOURLY MAX GAMMA DEFLECTIONS/K INDICES
00-03 03-06 06-09 09-12 12-15 15-18 18-21 21-00
MEANOOK 6/0 4/0 5/0 11/0 13/0 14/0 13/0 14/0
SITKA 6/0 5/0 6/0 14/0 9/0 14/0 12/0 10/0
OTTAWA 5/0 4/0 5/0 4/0 13/0 16/1 11/0 6/0
SAINT JOHNS 4/0 4/0 6/0 3/0 10/0 12/0 7/0 5/0
NEWPORT 4/0 5/0 3/0 8/0 7/0 9/0 7/0 9/0
FREDERICKSBU 4/0 3/0 5/0 4/0 10/0 13/0 7/0 5/0
BOULDER 4/0 4/0 3/0 5/0 5/0 9/0 14/0 11/1
HARTLAND 6/0 5/0 6/0 8/0 7/0 9/0 8/0 5/0
FRESNO 4/0 4/0 3/0 5/0 5/0 9/0 12/0 13/1
3-HOUR AP 0 0 0 0 2 2 2 2
3-HOUR KP 0Z 0Z 0Z 0Z 0P 0P 0P 0P
24-HOUR AP 2 2 2 2 1 1 1 1
99999
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