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Missing Data and the Accuracy of Magnetic-observatory Hour Means : Volume 27, Issue 9 (29/09/2009)

By Love, J. J.

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Book Id: WPLBN0003977856
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Missing Data and the Accuracy of Magnetic-observatory Hour Means : Volume 27, Issue 9 (29/09/2009)  
Author: Love, J. J.
Volume: Vol. 27, Issue 9
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Love, J. J. (2009). Missing Data and the Accuracy of Magnetic-observatory Hour Means : Volume 27, Issue 9 (29/09/2009). Retrieved from http://worldlibrary.in/


Description
Description: Geomagnetism Program, US Geological Survey, Denver, CO, USA. Analysis is made of the accuracy of magnetic-observatory hourly means constructed from definitive minute data having missing values (gaps). Bootstrap sampling from different data-gap distributions is used to estimate average errors on hourly means as a function of the number of missing data. Absolute and relative error results are calculated for horizontal-intensity, declination, and vertical-component data collected at high, medium, and low magnetic latitudes. For 90% complete coverage (10% missing data), average (RMS) absolute errors on hourly means are generally less than errors permitted by Intermagnet for minute data. As a rule of thumb, the average relative error for hourly means with 10% missing minute data is approximately equal to 10% of the hourly standard deviation of the source minute data.

Summary
Missing data and the accuracy of magnetic-observatory hour means

Excerpt
Barkhatov, N A., Levitin, A E., and Sakharov, S Y.: The method of artificial neuron networks as a procedure for reconstructing gaps in records of individual magnetic observatories from the data at other stations, Geomag. Aeron., 42, 187–190, 2002.; Brooke, C.: On the automatic registration of magnetometers, and other meteorological instruments, by photography, Phil. Trans. R. Soc. Lond., 137, 69–77, 1847.; Bulmer, M G.: Principles of Statistics, Dover Publications, New York, NY, 1979.; Efron, B.: The Jackknife, the Bootstrap and Other Resampling Plans, Soc. for Indust. and Appl. Math., Bristol, UK, 1982.; Hejda, P., Herzog, D., Linthe, H J., Mandea, M., Schott, J J., and Svalgaard, L.: On the derivation of hourly mean values with incomplete data, IAGA Scientific Assembly, Sopron, Hungary, 11, Program Abstract p. 33, 2009.; Hitchman, A P., Crosthwaite, P G., Hopgood, P A., Lewis, A M., and Wang, L.: Australian Geomagnetism Report 2006, Geoscience Australia, Canberra, ACT, 2008.; Herzog, D C.: The effects of missing data on mean hourly values, in: Proceedings of the XIIIth IAGA Workshop on Geomagnetic Instruments, Data Acquisition, and Processing, edited by: Love, J J., pp. 116–126, US Geological Survey, in press, 2009.; Kerridge, D J.: INTERMAGNET: Worldwide near-real-time geomagnetic observatory data, Proc. ESA Space Weather Workshop, ESTEC, Noordwijk, The Netherlands, http://www.esa-spaceweather.net/spweather/workshops/workshops.html, 2001.; Lesur, V., Wardinski, I., Rother, M., and Mandea, M.: GRIMM: the GFZ reference internal magnetic model based on vector satellite and observatory data, Geophys. J. Int., 173, 382–394, doi:10.1111/j.1365-246X.2008.03724.x, 2008.; Little, R. J A. and Rubin, D B.: Statistical Analysis with Missing Data, John Wiley & Sons, Hoboken, NJ, 2002.; Love, J J.: Magnetic monitoring of Earth and space, Physics Today, 61, 31–37, 2008.; Mandea, M.: 60, 59, 58 ... How many minutes for a reliable hourly mean?, in: Proceedings of the Xth IAGA Workshop on Geomagnetic Instruments, Data Acquisition, and Processing, edited by: Loubser, L., pp. 112–120, Hermanus Magnetic Observatory, Hermanus, South Africa, 2002.; McPherron, R L.: Standard indices of geomagnetic activity, in: Introduction to Space Physics, edited by: Russell, C T. and Kivelson, M G., pp. 451–458, Appendix 13B, Cambridge Univ. Press, Cambridge, UK, 1995.; Newitt, L R.: The effects of missing data on the computation of hourly mean values and ranges, in: Proceedings of the XIIIth IAGA Workshop on Geomagnetic Instruments, Data Acquisition, and Processing, edited by: Love, J J., pp. 194–201, US Geological Survey, in press, 2009.; Olsen, N.: The electrical conductivity of the mantle beneath Europe derived from $C$-responses from 3 to 720 hr, Geophys. J. Int., 133, 298–308, 1998.; Press, W H., Teukolsky, S A., Vetterling, W T., and Flannery, B P.: Numerical Recipes, Cambridge Univ. Press, Cambridge, UK, 1992.; Pulz, E., Jäckel, K H., and Bronkalla, O.: A quasi absolute optically pumped magnetometer for the permanent recording of the Earth's magnetic field vector, in: Proceedings of the XIIIth IAGA Workshop on Geomagnetic Instruments, Data Acquisition, and Processing, edited by: Love, J J., pp. 216–219, US Geological Survey, in press, 2009.; Rasson, J L.: INTERMAGNET, in: Encyclopedia of Geomagnetism and Paleomagnetism, edited by Gubbins, D. and Herrero-Bervera, E., pp. 715–717, Springer-Verlag, New York, NY, 2007.; Schott, J J. and Linthe, H J.: The hourly mean computation problem revisited, in: XIIth IAGA Workshop on Geomagnetic Instruments, Data Acquisition and Processing, edited by Reda, J., pp. 135–143, Institute of Geophysics, Polish Acad. Sci., Warszawa, 2007.; Svalgaard, L. and Cliver, E W.: Long-term geomagnetic indices and their use in inferring solar wind parameters in the past, J. Adv. Space Res., 40, 1112–1120, doi:10.1016/j.asr.2007.06.066, 2007.; Winch, D E.: Spherical harmonic analysis of geomagnetic tides, 1964-1965, Phil. Trans. R

 

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