Selected gamma-ray spectrometry references (1 of 6)
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Grasty, R.L., 1979, Gamma-ray spectrometric methods in uranium exploration – theory and operational procedures: In Geophysics and Geochemistry in the Search for Metallic Ores; ed. P.J. Hood, Geological Survey of Canada, Economic Geology Report 31, 147-161.

Grasty, R.L., 1997. Radon emanation and soil moisture effects on airborne gamma-ray measurements. Geophysics, v. 62, n. 5, 1379-1385.
IAEA, 2003, Guidelines for radioelement mapping using gamma-ray spectrometry data: IAEA-TECDOC-1363, International Atomic Energy Agency, Vienna.

Løvborg, L., Mose, E., 1987. Counting statistics in radioelement assaying with a portable spectrometer. Geophysics, v. 52, n.4, 555-563.
Minty, B.R.S., 1997. Fundamentals of airborne gamma-ray spectrometry. AGSO Journal of Australian Geology and Geophysics, v. 17, n. 2, 39-50.
Grasty R.L., Minty B.R.S., 1995. A guide to the technical specifications for airborne gamma-ray surveys. Australian Geological Survey Organisation Record 1995/60. 
IAEA, 1989. Construction and Use of Calibration Facilities for Radiometric Field Equipment. Technical Reports Series No. 309, International Atomic Energy Agency, Vienna.

IAEA, 1991. Airborne gamma-ray spectrometer surveying. Technical Report Series, No. 323. International Atomic Energy Agency, Vienna.

IAEA, 2003, Guidelines for radioelement mapping using gamma-ray spectrometry data: IAEA-TECDOC-1363, International Atomic Energy Agency, Vienna.

Spectral noise reduction 
Dickson, B. and Taylor, G., 1998, Noise reduction on aerial gamma-ray surveys: Exploration Geophysics, 29(3/4), 324-329. 
Grasty, R.L., 2001. Spectral component analysis applied to portable gamma ray spectrometry. Extended Abstracts, 15th Geophysical Conference, Australian Society of Exploration Geophysicists.

Green A.A., Berman M., Switzer P., Craig M.D., 1988. A transformation for ordering multispectral data in terms of image quality with implications for noise removal. IEEE Trans. Geosci. and Remote Sensing, GE-26, 65-74.
Hovgaard, J., 1997, A new processing technique for airborne gamma-ray spectrometer data (Noise adjusted singular value decomposition): Am Nucl. Soc. Sixth topical meeting on Emergency Preparedness and Response, pp. 123-127, San Fransisco, April 22-25,1997.

Hovgaard, J., and Grasty, R.L., 1997. Reducing statistical noise in airborne gamma-ray data through spectral component analysis. In “Proceedings of Exploration 97: Fourth Decennial Conference on Mineral Exploration” edited by A.G. Gubins, 753-764.

Lee, J.B., Woodyatt, A.S. and Berman M., 1990, Enhancement of high spectral resolution remote-sensing data by a noise-adjusted principal components transform: IEEE Trans. Geosci. and Remote Sensing, v. 28(3), 295-304.

Minty, B.R.S. 2000. Reducing noise in airborne gamma-ray spectra. Preview, Issue n. 89.
Minty, B.R.S. and Hovgaard, J., 2002, Reducing noise in gamma-ray spectra using spectral component analysis: Exploration Geophysics, 33 (3/4),172-176.

Minty, B.R.S., McFadden, P., 1998. Improved NASVD smoothing of airborne gamma-ray spectra. Exploration Geophysics, v. 29, n. 3/4, 516-523. 
Switzer P. and Green A., 1984, Min/max autocorrelation factors for multivariate spatial imagery: Dept. of Statistics, Stanford University, Tech. Rep. 6.

Calibration and data processing 
Billings, S.D., 1998. Geophysical aspects of soil mapping using airborne gamma-ray spectrometry. PhD thesis (unpublished), University of Sydney, 1998.

Billings, S.D., Hovgaard, J., 1999. Modeling detector response in airborne gamma-ray spectrometry. Geophysics, v. 64, 1378-1392.

Billings, S.D., Minty, B.R.S. and Newsam, G.N., 2003. Deconvolution and spatial resolution of airborne gamma-ray surveys. Geophysics, 68 (4), 1257-1266.

Craig, M., Dickinson, B., Rodrigues, S., 1999. Correcting aerial gamma-ray survey data for aircraft altitude. Exploration Geophysics, v. 30, 161-166.


Selected Gamma References