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Publications & Brochures

  • DgS Airborne & Marine System Brochure
    DgS Airborne & Marine System Brochure
    Brochure for DgS AT1 Airborne and Marine gravity systems.
  • AT1 Marine Processing Overview
    AT1 Marine Processing Overview
    Introduction to the processing of AT1M files to obtain Free Air Gravity Anomaly data.
  • Airborne Gravity Smoothing by Kalman Filter with Adaptive 2nd Order Gauss Markov Stochastic Gravity Model
    Airborne Gravity Smoothing by Kalman Filter with Adaptive 2nd Order Gauss Markov Stochastic Gravity Model
    Airborne gravimetry requires the use of low pass filtering to obtain the gravity anomalies due to the small signal to noise ratios generated by the aircraft motions and the fact that in general the power of the various sources of noise concentrates in the higher frequencies of the measured data. In this work, a Kalman smoother is designed based on a second order Gauss Markov for free air stochastic gravity model. The optimum parameters for the Gauss Markov gravity model are determined/tuned from the gravity meter data. The performance of the Kalman smoother is then compared with a finite impulse response (FIR) windowed exact Blackman and a Gaussian window design using simulated data.
  • DgS Advanced Technology Hardware
    DgS Advanced Technology Hardware
    Overview of the full feedback system hardware used in Airborne, Marine, Underwater and Land Gravity meters.
  • Results and Advantages of Using an Advanced Technology Airborne Gravity Meter to Map the Geoid in the U.S.
    Results and Advantages of Using an Advanced Technology Airborne Gravity Meter to Map the Geoid in the U.S.
    The National Geodetic Survey (NGS) has been acquiring airborne gravity data over the entire United States and its territories for the past 10 years as part of the GRAV-D project www.ngs.noaa.gov/GRAV-D to directly measure the geoid and redefine the vertical datum for elevation in the USA. The purpose of these flight tests was to determine the suitability and performance of the Advanced Technology gravity meter to use in airborne gravity surveying and in particular whether it could be used in the GRAV-D geoid mapping program The new system was flown concurrently with an NGS TAGS-7 gravity meter and compared to calculated EGM 2008 for reference.