STRaND-1

STRaND-1 magnetic field vector analysis

STRaND-1 magnetic field vector analysis by DK3WN
                                                              (Click to enlarge)

    
 Germany (Mike)                          Australia (Colin)


    
 West Coast US (Ken)                     Japan (Mineo)


Subject: STRaND-1 magnetometer data analysis
From: Mike Rupprecht
Date: Fri, 29 Mar 2013 19:45:50 +0100

Hi all,

I finished my orbit simulation software and did some interesting analyses.
See attached 4 screenshots. These data are from Colin - Australia, Ken-
West Coast US, Mineo - Japan und Mike.

You can see the calculated F value from the WMM2010 model and the real F
(calculated by mag x, y, z) sent by STRaND. It is very intersting to see
the deviation here in Europe and in Japan.

Maybe I will add a spline function to smooth the real F curve later.

The plots in the world mag map are not very precise because I have some
issues with the y conversion into mercator projection. Will fix that later.

@Chris: I assume the mag telemetry values are not calibrated, so we have
the raw values from the magnetometer?

Additionally I optimized the telemetry decoder software. I calculated
the time offset of the OBC clock and can now recalculate the "real" time.
In this way I got the timestamp for Mineo's and Ken's telemetry file.
Colin and I using a software which adds a timestamp to the kiss file -
so we have a accurate time for later processing.

So, I wish you all a great Easter time.
Best wishes
Mike


[Supplement1]
 World Magnetic Model
 NOAA National Geophysical Data Center
 http://www.ngdc.noaa.gov/geomag/WMM/DoDWMM.shtml

[Supplement2]
 STRaND-1 Telemetry Decoder by DK3WN
 http://www.dk3wn.info/files/strand1.zip

[Supplement3]
 Geospatial Information Authority of Japan, Geomagnetic Survey
 Kakioka Magnetic Observatory, Japan Meteorological Agency
 Data Analysis Center for Geomagnetism and Space Magnetism, Graduate School of Science, Kyoto University