SPWG Activities

Historical Results

SPWG Results SEP 1999

SPWG Results DEC 2000

SPWG Results DEC 2001

SPWG Results OCT 2002

SPWG Results APR 2003

SPWG Results OCT 2003

SPWG Minutes JUN 2004

Signal Processing WG Activities

These activities were last updated October 2003.

The SPWG has built on previous work in order to develop and test models to derive Center of Mass (CoM) corrections appropriate to various observing systems for a number of satellite arrays. In particular, the following have been considered:

CoM corrections for LAGEOS, Ajisai, and Etalon
Return energy effects for single-photon detectors
Data clipping effects
Statistics to monitor system stability
Planar array effects (e.g. GLONASS)

REFERENCES:

Appleby, G.M. Satellite Signatures in SLR Observations, Proc 8th Int. Workshop on Laser Ranging Instrumentation, NASA CP-3214, p2.1-2.14, 1992.

Appleby, G.M., Gibbs P., Monitoring Potential Range Biases in Single Photon SLR Systems, proc Ninth Int. Workshop on Laser Ranging Instrumentation, pp 92-102. Luck, J McK, ed, Canberra, 1996.

Arnold, D., Optical and Infrared Transfer Function of the LAGEOS Retroreflector Array, Grant NGR 09-015-002, May 1978.

Arnold, D., Method of Calculating Retroreflector-Array Transfer Functions, Smithsonian Astrophysical Observatory SPECIAL REPORT 382.

Arnold, D., Retroreflector-Array Transfer Functions, 13th International Laser Ranging Workshop, Washington DC, October 2002.

Chang, R., Alley, C., Currie, D., Faller, J., Optical Properties of the Apollo Laser Ranging Retroreflector Arrays, Space Research XII, Akademie-Verlag, Berlin, 1972.

Kirchner, G, Koidl, F. Automatic SPAD time walk compensation, proc. Tenth Int. Workshop on Laser Ranging Instrumentation, pp 293-296. Fumin Y, Wanzhen, C, eds, Shanghai, 1996.

Minott, O., Zagwodski, T., Varghese, T., Seldon, M., Prelaunch Optical Characterization of the Laser Geodynamics Satellite (LAGEOS-2).

Neubert, R. An analytical model of satellite signature effects, proc Ninth Int. Workshop on Laser Ranging Instrumentation, pp 82-91. Luck, J McK, ed, Canberra, 1996.

Otsubo, T., Amagai, J., Kunimori, H. The centre-of-mass correction of the geodetic satellite AJISAI for single-photon laser ranging, IEEE Trans. on Geoscience and Remote Sensing, Vol 37, No. 4, pp 2011-2018, 1999.

Otsubo, T., Amagai, J., Kunimori, H, Elphick, M. Spin motion of AJISAI satellite derived from spectral analysis of laser ranging data. IEEE Trans. on Geoscience and Remote Sensing, Vol 38, No. 3, pp 1417-1424, 2000.

Otsubo, T., Appleby G.M., Gibbs P., GLONASS laser ranging accuracy with satellite signature effects, Surv. Geophys., 22, 509-516, 2001.

Otsubo, T., Appleby, G., Recovery of Target Responses Function for Centre-of-mass Corrections of Spherical Satellites, 13th International Laser Ranging Workshop, Washington DC, October 2002.

Otsubo, T., Appleby, G., System-dependent center-of-mass correction for spherical geodetic satellites, Journal of Geophysical Research, Vol. 108, No. B4, 2201, 2003.

Otsubo, T., Appleby, G., Theoretical Centre-of-mass Corrections for LAGEOS, ETALON and AJISAI, ILRS Workshop, Koetzting, Germany, Oct 2003.

Sinclair, A.T, Neubert, R., Appleby, G.M. The LAGEOS centre of mass correction for different detection techniques, proc Annual EUROLAS meeting, pp 31-36, Sinclair, A.T., ed, Royal Greenwich Observatory, 1995.

T. Varghese, T.W. Zagwodzki, J. F. McGarry, J.J. Degnan, and B. Conklin," On-orbit Measurement of TOPEX Impulse Response: Assessment of Coherent Interaction and Verification of Range Correction", Proc. 10th International Workshop on Laser Ranging Instrumentation, pp. 242-250, Shanghai, China, Nov. 10-14, 1996.

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