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Targets, Signatures, and Biases Session Summary

G. Appleby and T. Otsubo

Title of Paper Principal Author
Laser Retroreflector Array of Geostationary Satellite, ETS-VIII M. Sawabe
Design of Laser Retro-Reflector Array and Laser Ranging Experiment for Shenzhou-IV Satellite Y. Fumin
REFLECTOR, LARETS and METEOR-3M(1) what did we learn from tracking campaign results V. Burmistrov
A New Approach for Mission Design for Geodetic Satellites M. Lara
Lageos' Asymmetric Reflectivity D. Arnold
Centre-of-Mass Correction Issues: Towards mm-Ranging Accuracy T. Otsubo
Return Energy Estimates Derived from Normal Point and Full-Rate Laser Data M. Wilkinson
Centre-of-Mass Correction Issues: Determining Intensity Dependency at a Multi-Photon (Moblas-5) Station R. Carman
Identifying Single Retro Tracks with a 2 Khz SLR System-Simulations and Actual Results D. Arnold


Laser System Diagram
LAGEOS Satellite
    Signal Transfer Diagram
  • Target design of new missions
    • Geostationary satellite ETS-8: # of photon = 1/100 of LAGEOS
    • Very low orbiter Shenzhou-4: first Chinese reflector in space
    • Nearly 1-ccr response LARETS: almost no signature effect
    • Dual-sphere satellite (METEOR3M-like): no signature at all! What orbit?
    • Analytical orbit design tool for future missions
    • Re-visiting non-gravitational force modeling for LAGEOS’
  • Signature and biases
    • Eliminate intensity-dependent biases contaminating geodetic parameters.
    • cm to mm high-low offset seen at Yarragadee and Herstmonceux (+Zimmerwald and McDonald).
    • kHz system at Graz seeing every CCR (like streak camera!)
  • It is highly recommended that stations quantify the effect by carrying out test ranging to
    Ground target, LAGEOS, Ajisai and (say) Envisat
    during which return levels are switched in a controlled way between minimum and maximum return levels within the systems’ dynamic ranges.
Signal return example


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Author: Carey E. Noll
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Last Updated: August 16, 2004